Clinical determinants of the modified incremental step test in adults with non-cystic fibrosis bronchiectasis / Determinantes clínicos do teste do degrau incremental modificado em adultos com bronquiectasia não fibrocística

ABSTRACT Objectives: This study primarily aimed to investigate the clinical determinants of the Modified Incremental Step Test (MIST) in adults with non-cystic fibrosis bronchiectasis (NCFB). A secondary objective was to compare the cardiopulmonary responses after the MIST and Incremental Shuttle Walk Test (ISWT), two commonly adopted symptom-limited maximum field tests in chronic respiratory diseases. Methods: Forty-six patients with clinically stable bronchiectasis participated in this cross-sectional study. MIST and ISWT were performed to determine exercise capacity, while disease severity, fatigue, and quality of life were assessed using the Bronchiectasis Severity Index (BSI), the Fatigue Severity Scale (FSS), and St. George's Respiratory Questionnaire (SGRQ), respectively. Quadriceps muscle strength was evaluated using a hand-held dynamometer, walking speed with a wireless inertial sensing device, and the level of physical activity (steps/day) with a pedometer. Results: The BSI score, quadriceps muscle strength, daily step count, and the SGRQ total score explained 61.9% of the variance in the MIST (p < 0.001, R2 = 0.67, AR2 = 0.619). The BSI score (r = -0.412, p = 0.004), quadriceps muscle strength (r = 0.574, p = 0.001), daily step count (r = 0.523, p < 0.001), walking speed (r = 0.402, p = 0.006), FSS score (r = -0.551, p < 0.001), and SGRQ total score (r = -0.570, p < 0.001) correlated with the MIST. The patients achieved higher heart rates (HR), HR%, desaturation, dyspnea, and leg fatigue in the MIST compared to the ISWT (p < 0.05). Conclusions: Disease severity, quadriceps muscle strength, physical activity level, and quality of life were determinants of MIST. The advantages of the MIST, including higher cardiopulmonary response than ISWT and greater portability, which facilitates its use in various settings, make MIST the preferred choice for investigating symptom-limited exercise capacity in patients with NCFB.

RESUMO Objetivos: Este estudo teve como objetivo principal investigar os determinantes clínicos do Teste do Degrau Incremental Modificado (TDIM) em adultos com bronquiectasia não fibrocística (BNFC). Um objetivo secundário foi comparar as respostas cardiopulmonares após o TDIM e o Teste Graduado de Caminhada (TGC), dois testes de campo máximos amplamente adotados e limitados por sintomas em doenças respiratórias crônicas. Métodos: Quarenta e seis pacientes com bronquiectasia clinicamente estável participaram deste estudo transversal. O TDIM e TGC foram realizados para determinar a capacidade de exercício, enquanto a gravidade da doença, fadiga e qualidade de vida foram avaliadas usando o Índice de Gravidade da Bronquiectasia (BSI), a Escala de Gravidade da Fadiga (FSS) e o Questionário Respiratório de Saint George (SGRQ), respectivamente. A força muscular do quadríceps foi avaliada usando um dinamômetro manual, a velocidade de caminhada com um dispositivo de sensor inercial sem fio e o nível de atividade física (passos/dia) com um pedômetro. Resultados: O escore BSI, a força muscular do quadríceps, a contagem diária de passos e o escore total do SGRQ explicaram 61,9% da variação no TDIM (p < 0,001, R2 = 0,67, AR2 = 0,619). O escore BSI (r = -0,412, p = 0,004), a força muscular do quadríceps (r = 0,574, p = 0,001), a contagem diária de passos (r = 0,523, p < 0,001), a velocidade de caminhada (r = 0,402, p = 0,006), o escore FSS (r = -0,551, p < 0,001) e o escore total do SGRQ (r = -0,570, p < 0,001) correlacionaram-se com o TDIM. Os pacientes atingiram maiores frequências cardíacas (FC), FC%, dessaturação, dispneia e fadiga nas pernas no TDIM em comparação com o TGC (p < 0,05). Conclusões: A gravidade da doença, a força muscular do quadríceps, o nível de atividade física e a qualidade de vida foram determinantes do TDIM. As vantagens do TDIM, incluindo uma resposta cardiopulmonar mais elevada que no TGC e maior portabilidade, que facilita sua utilização em diversos ambientes, fazem do TDIM a escolha preferencial para investigar a capacidade de exercício limitada por sintomas em pacientes com BNFC.

Associação entre declínio cognitivo, sintomas depressivos e do medo de cair com a velocidade da marcha confortável em idosos comunitários / Association between cognitive decline, depressive symptoms and the fear of falling with the speed gait in community-dwelling older adults

Diminuições na velocidade da marcha (VM) estão associadas a desfechos adversos na saúde física e mental em idosos. Assim, torna-se relevante identificar fatores que podem associar-se com a VM confortável em idosos, de forma a propor estratégias para prevenção de alterações na mobilidade. Objetivo: verificar a associação entre declínio cognitivo, sintomas depressivos e do medo de cair com a VM confortável em idosos comunitários. Métodos: tratou-se de um estudo transversal, com amostra probabilística, incluindo 308 idosos comunitários. O desfecho do estudo foi a VM confortável, sendo considerado como baixo desempenho VM < 0,8m/s. As variáveis preditoras foram 1) declínio cognitivo avaliado pelo Mini Exame do Estado Mental, 2) sintomas depressivos avaliados com a Escala de Depressão Geriátrica Abreviada e 3) medo de cair avaliado pela Falls Efficacy Scale ­ Brasil. Para analisar a associação entre as variáveis foi utilizada a Regressão Logística Multivariada. Resultados: idosos tiveram chances significativamente maiores de apresentar baixo desempenho na VM confortável quando apresentaram declínio cognitivo (OR: 4,67; IC95%: 1,68; 12,94), sintomas depressivos (OR: 2,90; IC95%: 1,42; 5,92) e medo de cair (OR: 4,08; IC95%: 1,72; 9,71) quando comparados aos que não tiveram essas condições. Conclusão: o declínio cognitivo, sintomas depressivos e medo de cair foram associados ao baixo desempenho na VM confortável nos idosos amostrados. Esses achados podem servir para identificação precoce dos fatores que estão associados a alterações na VM confortável, contribuindo para a proposição de estratégias públicas em saúde e no direcionamento de atividades de promoção em saúde para idosos comunitários.(AU)

Decreases in gait speed (GS) are associated with adverse outcomes in the physical and mental health of the elderly. Thus, it is relevant to identify factors that can be associated with comfortable GS in community-dwelling older adults, to propose strategies to prevent changes in mobility. Objective: To verify the association between cognitive decline, depressive symptoms, and fear of falling with comfortable GS in community-dwelling older adults. Methods: This was a cross-sectional study with a probabilistic sample, including 308 community-dwelling older adults. The study outcome was comfortable GS, being considered as low-performance MV < 0.8m/s. Predictive variables were 1) cognitive decline assessed by the Mini-Mental State Examination, 2) depressive symptoms assessed by the Abbreviated Geriatric Depression Scale, and 3) fear of falling assessed by the Falls Efficacy Scale - Brasil. Multivariate Logistic Regression was used to verify the association between the variables. Results: Community-dwelling older adults were significantly more likely to have poor performance in comfortable GS when they presented cognitive decline (OR: 4.67; 95%CI: 1.68; 12.94), depressive symptoms (OR: 2.90; 95%CI: 1 .42; 5.92), and fear of falling (OR: 4.08; 95%CI: 1.72; 9.71) when compared to those who did not have these conditions. Conclusion: Cognitive decline, depressive symptoms, and fear of falling were associated with poor performance in comfortable GS in the community-dwelling older adults sampled. These findings can serve for early identification of factors that are associated with changes in comfortable GS, contributing to the proposition of public health strategies and in directing health promotion activities for community-dwelling older adults.(AU)

Association between isokinetic strength measures and functional performance in community-dwelling older adults / Asociación entre las medidas de fuerza isocinética y el rendimiento funcional en personas mayores en la comunidad / Associação entre medidas de força isocinética e desempenho funcional em pessoas idosas da comunidade

ABSTRACT Previous studies have shown an association between lower limb muscle strength and functional performance, but a dose-response relationship between the strength of each lower limb muscle group and performance in daily life activities in older adults has not been well established. Thus, this study aimed to investigate the association between isokinetic muscle strength of all eight major lower limb muscle groups and functional performance in community-dwelling older adults. The muscle strength of the plantar flexors and dorsiflexors of the ankle, flexors and extensors of the knee, and flexors, extensors, adductors, and abductors of the hip were evaluated using a Biodex System 4 Pro® isokinetic dynamometer. Functional performance was evaluated in 109 participants using the five-times sit-to-stand test (STS) and 4-meter usual walking speed (UWS). The multiple linear regression analyses showed that the hip abductors strength predicted 31.3% of the variability for UWS (p=0.011), and the knee extensors strength (p=0.015) predicted 31.6% of the variability for the STS. We conclude that hip abductors and knee extensors could be the key muscle groups involved in sit to stand and walking speed performance in older adults.

RESUMEN Estudios previos ya demostraron la asociación entre la fuerza muscular de los miembros inferiores y el rendimiento funcional, sin embargo, no está bien establecida la contribución de los principales músculos de los miembros inferiores sobre el rendimiento de las personas mayores en las actividades diarias. El objetivo de este estudio fue evaluar la asociación entre la fuerza muscular isocinética de los ocho principales grupos musculares de los miembros inferiores y el rendimiento funcional en personas mayores que viven en la comunidad. La fuerza muscular de los plantiflexores y dorsiflexores del tobillo, los flexores y extensores de la rodilla y los flexores, extensores, aductores y abductores de la cadera se evaluaron por medio del dinamómetro isocinético Biodex System 4 Pro®. El rendimiento funcional de 109 participantes se evaluó mediante el test de sentarse y pararse cinco veces (STS) y la velocidad de marcha habitual de 4 metros. Los análisis de regresión lineal múltiple mostraron que la fuerza de los abductores de la cadera predijo el 31,3% de la variabilidad para la velocidad de marcha habitual (p=0,011); y la fuerza de los extensores de la rodilla (p=0,015), el 31,6% de variabilidad para STS. Se concluyó que los abductores de la cadera y los extensores de la rodilla pueden ser los principales grupos musculares involucrados en el rendimiento de los adultos mayores para sentarse, pararse y caminar.

RESUMO Estudos anteriores já demonstraram a associação entre força muscular de membros inferiores e desempenho funcional, mas a contribuição dos principais músculos dos membros inferiores para o desempenho de pessoas idosas nas atividades cotidianas não foi bem estabelecida. O objetivo deste estudo foi investigar a associação entre a força muscular isocinética dos oito principais grupos musculares dos membros inferiores e o desempenho funcional em pessoas idosas da comunidade. A força muscular dos plantiflexores e dorsiflexores do tornozelo, flexores e extensores do joelho e flexores, extensores, adutores e abdutores do quadril foi avaliada utilizando um dinamômetro isocinético Biodex System 4 Pro®. O desempenho funcional de 109 participantes foi avaliado usando o teste de sentar e levantar cinco vezes (TSL) e de velocidade de marcha habitual de 4 metros (VMH). As análises de regressão linear múltipla mostraram que a força dos abdutores do quadril previu 31,3% da variabilidade para a VMH (p=0,011), e a força dos extensores do joelho (p=0,015) 31,6% da variabilidade para o TSL. Concluímos que os abdutores do quadril e os extensores do joelho podem ser os principais grupos musculares envolvidos no desempenho de pessoas idosas para sentar-levantar e caminhar.

Efecto de la retroalimentación visual sobre la velocidad de la marcha después de un accidente cerebrovascular: diseño de caso único / Effects of Visual Feedback on Walking Speed for Stroke Patients: Single-case Design

Introducción. La recuperación de la marcha es uno de los principales objetivos en rehabilitación después de un ACV. Basados en los principios de aprendizaje motor, se han desarrollado nuevas estrategias en neurorrehabilitación basadas en la práctica repetitiva, orientada a la tarea y la retroalimentación. Esto último ha demostrado ser una de las variables clave para el entrenamiento, por su fácil obtención y manipulación. Sin embargo, aún no existen estudios concluyentes que permitan identificar el efecto real de esta variable y su influencia en la recuperación y el desempeño funcional de la marcha. Objetivo. Determinar el efecto de la retroalimentación visual sobre la velocidad de la marcha después de un accidente cerebrovascular en adultos con estadios subagudos y crónicos. Metodología. Diseño de caso único de línea de base múltiple, aleatorio no concurrente de cuatro participantes. Se evaluó la velocidad de la marcha determinando las diferencias en el nivel, la tendencia, la estabilidad de los datos y la no superposición de datos mediante el análisis visual basado en la documentación técnica para diseños de caso único de la What Works Clearinghouse. Resultados. Cuatro participantes con rango de edad de 19 a 73 años fueron incluidos en el estudio. El cambio en el nivel para todos los participantes demostró un incremento en los valores de la velocidad de la marcha después de la introducción de la intervención (media: 0.76 m/s). El análisis visual de la tendencia estimó aceleración para la línea de intervención para tres participantes. Los datos en la fase de base e intervención cumplieron el criterio de estabilidad medido con el método de banda de dos desviaciones estándar (media: 0.05 m/s); los patrones de cambio demostraron efecto inmediato con mejoría gradual durante la intervención para los participantes 1, 3 y 4. El porcentaje de no superposición de datos mostró efectividad de la intervención para tres de los participantes (PND >91.67%). Conclusiones. Los hallazgos presentados en este estudio representan un aporte científico que respalda la pertinencia del uso y aplicación de los principios de aprendizaje motor para el desarrollo de nuevas estrategias en rehabilitación motora. Sin embargo, este estudio constituye un primer paso para realizar estudios más robustos que incluyan replicación de las fases en el estudio y la evaluación del seguimiento para determinar la permanencia de los efectos a largo plazo.

Introduction. Gait recovery is one of the main goals in post-stroke rehabilitation. Based on the principles of motor learning, new strategies have been developed in neurorehabilitation based on repetitive, task-oriented practice, and feedback. The latter has proven to be one of the most critical variables for training, because it is easy to obtain and manipulate. However, there are still no conclusive studies to identify the real effect of this variable and its influence on recovery and functional gait performance. Objective. To determine the effect of visual feedback on gait speed after stroke in adults with subacute and chronic stages.Methodology. Single-case, multiple baseline, non-concurrent randomized, and four-participant design. Gait velocity was assessed by determining differences in level, trend, data stability, and nonoverlapping data using visual analysis based on technical documentation for single-case designs from the What Works Clearinghouse.Results. Four participants ranging in age from 19 to 73 years were included in the study. The change in level for all participants demonstrated an increase in gait velocity values after the introduction of the intervention (mean: 0.76 m/s). Visual trend analysis estimated acceleration for the intervention line for three participants. The data in the baseline and intervention phase met the stability criterion measured with the two standard deviation band method (mean: 0.05 m/s); patterns of change demonstrated immediate effect with gradual improvement during the intervention for participants 1, 3, and 4. The percentage of nonoverlapping data showed effective-ness of the intervention for three of the participants (PND >91.67%).Conclusions. The findings presented in this study represent a scientific contribution that supports the relevance of the use and application of motor learning principles for the development of new strategies in motor rehabilitation. However, this study constitutes a first step towards more robust studies that include replication of the phases in the study and follow-up evaluation to determine the permanence of long-term effects.

Relationship between lower limb muscle strength and walk speed in community dwelling older adults: the chain mediating role of flexibility and dynamic balance / 中国康复理论与实践

ObjectiveTo investigate the relationship between lower limb muscle strength and walking speed in older adults, and to analyze the mediating role of flexibility and dynamic balance. MethodsFrom November to December, 2021, a total of 155 older adults at the Shanghai Senior Sports and Health Home were included. Their basic health information was collected, and the lower limb muscle strength, flexibility, dynamic balance and walking speed were tested. A mediated effects analysis was conducted. ResultsThere was a pairwise correlation among lower limb muscle strength, flexibility, dynamic balance and walking speed in older adults (r > 0.210, P < 0.01). In the mediated effects model, after controlling for age and gender, lower limb muscle strength did not directly predict walking speed in older adults (β = 0.029, P = 0.699), however, lower limb muscle strength could influence walking speed through the partial mediation of dynamic balance (effect = 0.0130, 95% CI 0.0073~0.0197) and the chain mediation of lower flexibility and dynamic balance (effect = 0.0019, 95% CI 0.0003~0.0043). ConclusionLower limb muscle strength can indirectly affect walking speed in older adults through the mediators of flexibility and dynamic balance, or the dynamic balance alone.

The effects of fast walking on persons with sarcopenia / 中华物理医学与康复杂志

Objective:To observe any effect of fast walking on walking speed, 6-minute walking test (6MWT) time, and on serum levels of growth differentiation factor-8 (GDF-8) and insulin-like growth factor-1 (IGF-1) in patients with sarcopenia.Methods:A total of 61 sarcopenia patients were randomly divided into an observation group ( n=31) and a control group ( n=30). Both groups were given conventional drug therapy. In addition, the observation group underwent 30-minutes of walking at 100-120 steps/min (about 60% of maximum heart rate) three times a week for 12 weeks. The control group also walked, but at 70-90 steps/min (less than 50% of maximum heart rate). Grip strength, walking speed, 6MWT time, skeletal muscle index (ASMI) and serum GDF-8 and IGF-1 were compared before and after the intervention. Results:There were no significant differences in grip strength or ASMI between observation group and control group (comparing males with males and females with females) before the experiment. Afterward, grip strength and ASMI in the observation group had increased significantly on average. Both were then significantly higher than the control groups′ averages, which had not changed significantly. Average walking speed, 6MWT time and serum IGF-1 levels had improved significantly in both groups, but the observation group′s average improvement was significantly greater. A significant decrease the average serum GDF-8 level was observed in the observation group, but not in the control group.Conclusion:Fast walking can improve the walking of persons with sarcopenia, raise serum IGF-1 levels, and significantly reduce serum GDF-8.

Relação entre marcadores hematológicos, endócrinos e imunológicos e a sarcopenia em idosos / Relationship between hematological, endocrine and immunological markers and sarcopenia in the elderly

Objetivo: Relacionar os marcadores hematológicos, endócrinos e imunológicos com os critérios de classificação da sarcopenia em idosos residentes na comunidade. Métodos: Estudo transversal, vinculado à pesquisa institucional "Atenção Integral à Saúde do Idoso". A população foi composta por indivíduos com idade igual ou superior a 60 anos, ambos os sexos, usuários da atenção primária à saúde. O protocolo de pesquisa contemplou entrevista, avaliação da sarcopenia e exames laboratoriais para avaliação do hemograma, da 25-hidroxivitamina D, paratormônio, fator de crescimento semelhante à insulina-1, interleucina-6 e proteína C reativa. Para análise estatística utilizou-se Teste de Mann-Whitney, Teste de qui-quadrado de Pearson, Exato de Fisher e Odds Ratio. Resultados: Verificou-se relação de interleucina-6 (p= 0,004), eritrócitos (p= 0,038), hemoglobina (p<0,001) e hematócrito (p= 0,002) com sarcopenia. Também observou-se que os idosos com força muscular alterada apresentaram valores mais baixos de hematócrito (p= 0,037) e mais altos de interleucina-6 (p= 0,002); e com desempenho físico alterado apresentaram valores mais baixos de leucócitos (p=0,024), hemoglobina (p<0,001), hematócrito (p= 0,007) e 25-hidroxivitamina D (p= 0,034) e mais altos de paratormônio (p= 0,018) e interleucina-6 (p= 0,002). Conclusão: Sugere-se a avaliação e acompanhamento dos níveis de interleucina-6, paratormônio, 25-hidroxivitamina D e da série vermelha do hemograma durante a prática assistencial.

Objective: To relate hematological, endocrine and immunological markers to the criteria for classifying sarcopenia in older people residents in the community. Method: Cross- sectional study, linked to the institutional research "Integrated Health Care for Older People". The study population consisted of males and females aged 60 years or more and assisted in primary health care. The research protocol included an interview and physical examination to evaluate the sarcopenia criteria. Analysis of the following were done: complete blood count, 25-hydroxyvitamin D, parathyroid hormone, insulin-like growth factor-1, interleukin-6 and C-reactive protein. Statistical analysis included the Mann-Whitney test, Pearson's chi-square test, Fisher's exact test and Odds Ratio. Results: There was a relationship between interleukin-6 (p= 0,004), erythrocytes (p= 0,038), hemoglobin (p<0,001) and hematocrit (p= 0,002) with sarcopenia. It was also observed that the older people with altered muscular strength had lower values of hematocrit (p= 0,037) and higher of interleukin-6 (p= 0,002); and with altered physical performance had lower values of leukocytes (p= 0,024), hemoglobin (p<0,001), hematocrit (p= 0,007) and 25-hydroxyvitamin D (p= 0,034) and higher levels of parathyroid hormone (p= 0,018) and interleukin-6 (p= 0,002). Conclusion: It is suggested to evaluate and monitor the levels of interleukin-6, parathyroid hormone, 25- hydroxyvitamin D and the red blood count series during care practice.

Functional Classification Spaces according to walking speed in self-sufficient Chilean older adults: A complement to the Periodic Physical Examination / Espacios de Clasificación Funcional según velocidad de marcha aplicada a adultos mayores autovalentes chilenos: Un complemento al Examen de Medicina Preventiva

Introduction Walking speed is related to functionality in daily activities. Preventive Medicine Examination of the Chilean older adults is a vital prevention program for Chilean community- dwelling older adults. However, this evaluation does not include speed in its battery of tests. Objective To evaluate the functional classification spaces for threshold, reference, and categorization val-ues of self- selected and maximum walking speed applied to self- sufficient older adults. Methods Seventy- two self- sufficient older adults participated in this observational, exploratory, and cross- sectional study. Each participant was asked to walk naturally and then at full speed for three minutes. Through a dispersion graph between self- selected walking speed (axis "x") and maximum walking speed (axis "y"), functional classification spaces were constructed according to documented values for i) thresholds of basic functionality, ii) referential for the instrumental spectrum and iii) functional categorization for "household walker" (< 0.4 meters per second, m/s), "limited community ambulator" (0.40 to 0.80 m/s), "community ambulator" (0.81 to 1.3 m/s), and "cross street safely" (> 1.3 m/s). The relative frequency (%) of older adults who meet each established quadrant was determined. Results The threshold was reached by 100% of the participants (basic daily activities). About 80% of the older adults have a functional classification space below the reference limit (instrumental and advanced daily activities). It was also found that 81% of women and 69% of men are "efficient in the community", and 31% of men and 14% of women reach the minimum value for "effec-tive street crossing" (advanced daily activities). Conclusions The exploration of functional classification spaces according to self- selected walking speed and maximum walking speed applied to a group of self- sufficient older adults reveals that this pop-ulation is at risk of deteriorating instrumental and advanced activities of daily living.

Introducción La velocidad de marcha se relaciona con la funcionalidad en actividades cotidianas. El Examen de Medicina Preventiva del Adulto Mayor es un hito relevante en la prevención de adultos mayores chilenos de la comunidad. Sin embargo, no incorpora a la velocidad dentro de su batería de pruebas. Objetivo Evaluar una propuesta complementaria al Examen de Medicina Preventiva del Adulto Mayor según Espacios de Clasificación Funcional para valores umbrales, referenciales y de categorización de velocidad de marcha confortable y máxima aplicada a personas mayores autovalentes. Métodos Participaron en este estudio observacional, exploratorio y transversal 72 adultos mayores autovalentes. Se solicitó a cada participante caminar naturalmente y luego a máxima velocidad durante 3 minutos. A través de un gráfico de dispersión entre velocidad de mar-cha confortable (eje "x") y máxima (eje "y"), se construyeron Espacios de Clasificación Funcional según valores documentados para i) umbrales de funcionalidad básica, ii) referenciales para el espectro instrumental y iii) categorización funcional para actividades "dentro del hogar" (< 0,4 m/s), "limitadas en la comunidad" (0,40 a0,80 m/s), "eficiente en la comunidad" (0,81 a1,3 m/s) y "cruce seguro de calles" (> 1,3 m/s). Se determinó la frecuencia relativa (%) de adultos mayores que cumplen con cada cuadrante establecido. Resultados El umbral fue sobrepasado por el 100% de los participantes (actividades cotidianas básicas). Cerca del 80% de los participantes presenta un Espacio de Clasificación Funcional bajo el límite de referencia (actividades cotidianas instrumentales y avanzadas). El 81% de las mujeres y el 69% de los hombres, se encuentran dentro del Espacio de Clasificación Funcional "eficiente en la comuni-dad". El 31% de los hombres y el 14% de las mujeres alcanzan el valor mínimo para el "cruce efectivo de calles" (actividades coti-dianas avanzadas). Conclusiones La exploración de Espacios de Clasificación Funcional según de velocidad de marcha confortable y máxima aplicada a un grupo de adultos mayores clasificados como autovalentes, resulta en individuos con riesgo para desarrollar actividades instrumentales y avanzadas.

Efectividad a mediano plazo de un programa multidimensional en personas mayores en centros diurnos en Chile / Effectiveness of a multidimensional therapeutic program for aged people attending senior centers

BACKGROUND: It is imperative to have effective programs to improve or maintain the health of aged people. AIM: To evaluate the effectiveness of an intervention based on a multidimensional program in Senior centers in Chile five months after its implementation, in the domains of physical and mental health, functionality and quality of life in aged people. MATERIAL AND METHODS: Sixty participants older than 60 years completed a multidimensional program for one month that included interventions of guided physical exercises, in addition to educational and social activities. They were evaluated at baseline and one and five months after the intervention. RESULTS: After the first and fifth months, significant improvements were observed in the five times sit to stand test (5TSTS) and gait speed (WST), in addition, significant improvements were observed in literacy measured by the Short Assessment of Health Literacy for Spanish-speaking Adults (SAHLSA). At the fifth month, slight improvements were observed in the Yesavage and short Falls efficacy scales, Barthel index, Unipodal Station and EuroQol five-dimensional quality of life tests. CONCLUSIONS: A multidimensional program for aged people lasting one month, improved the physical health dimension and literacy by the fifth month of evaluation.

Insufficient physical activity and multimorbidity was associated with low physical functional performance in older adults: a cross-sectional study / Atividade física insuficiente e multimorbidade foram associadas ao baixo desempenho físico funcional em idosos: um estudo transversal

Aging, physical inactivity, and chronic disease can decrease strength and muscle mass and affect mobility and autonomy in older adults. This study aimed to analyze the prevalence and associated factors of low physical functional performance among older adults in the city of Pomerode, in southern Brazil. Methods: This is a cross-sectional population-based study with data on 733 older adults from the Study of Health in Pomerode ­ SHIP-Brazil. Low functional physical performance was defined as handgrip strength ≤ 32 kg for men or ≤ 20 kg for women and/or a Timed Up and Go test ≥ 11 seconds for men or ≥ 13 seconds for women. Associations were analyzed by multiple logistic regression. Results: The prevalence of low physical functional performance was 43.7% (42.2% among women and 45.5% among men). Low physical functional performance was associated with the 70­79 years age group (odds ratio [OR] = 2.07) and insufficient physical activity (OR = 2.73) in men, and with the 70­79 years age group (OR = 2.09) and multimorbidity (OR = 1.87) in women. In general, older age, insufficient physical activity, and multimorbidity were associated with low physical functional performance in older adults.

O envelhecimento, o sedentarismo e as doenças crônicas podem diminuir a força e a massa muscular e afetar a mobilidade e a autonomia do idoso. O objetivo deste estudo foi analisar a prevalência e os fatores associados ao baixo desempenho funcional em idosos de uma cidade de origem pomerana no sul do Brasil. Metodologia: Estudo transversal de base populacional com dados de 733 idosos do Estudo Vida e Saúde em Pomerode ­ ShipBrazil. O baixo desempenho físico funcional foi definido como a força de preensão palmar ≤ 32 kg para os homens ou ≤ 20 kg para as mulheres e(ou) timed up and go ≥ 11 segundos para os homens ou ≥ 13 segundos para as mulheres. As associações foram analisadas por regressão logística múltipla. Resultados: A prevalência de baixo desempenho físico funcional foi de 43,7% (42,2% idosas e 45,5% idosos). O baixo desempenho físico funcional foi associado à idade, 70-79 anos (OR = 2,07), e à atividade física insuficiente (OR = 2,73) nos homens; e à idade, 70­79 anos (OR = 2,09), e à presença de multimorbidade (OR = 1,87) nas mulheres. Em geral, maior idade, atividade física insuficiente e multimorbidade foram associadas ao baixo desempenho físico funcional entre os idosos.

Respostas fisiológicas à caminhada máxima e submáxima em pacientes com doença arterial periférica sintomática / Physiological responses to maximal and submaximal walking in patients with symptomatic peripheral artery disease

Resumo Fundamento: Embora a caminhada máxima e submáxima sejam recomendadas para pacientes com doença arterial periférica (DAP), a realização desses exercícios pode induzir diferentes respostas fisiológicas. Objetivos: Comparar os efeitos agudos de caminhada máxima e submáxima na função cardiovascular, a regulação e os processos fisiopatológicos associados pós-exercício em pacientes com DAP sintomática. Métodos: Trinta pacientes do sexo masculino foram submetidos a 2 sessões: caminhada máxima (protocolo de Gardner) e caminhada submáxima (15 períodos de 2 minutos de caminhada separados por 2 minutos de repouso ereto). Em cada sessão, foram medidos a pressão arterial (PA), a frequência cardíaca (FC), a modulação autonômica cardíaca (variabilidade da FC), os fluxos sanguíneos (FS) do antebraço e da panturrilha, a capacidade vasodilatadora (hiperemia reativa), o óxido nítrico (ON), o estresse oxidativo (a peroxidação lipídica) e a inflamação (quatro marcadores), pré e pós-caminhada. ANOVAs foram empregadas e p < 0,05 foi considerado significativo. Resultados: A PA sistólica e a PA média diminuíram após a sessão submáxima, mas aumentaram após a sessão máxima (interações, p < 0,001 para ambas). A PA diastólica não foi alterada após a sessão submáxima (p > 0,05), mas aumentou após a caminhada máxima (interação, p < 0,001). A FC, o equilíbrio simpatovagal e os FS aumentaram de forma semelhante após as duas sessões (momento, p < 0,001, p = 0,04 e p < 0,001, respectivamente), enquanto a capacidade vasodilatadora, o ON e o estresse oxidativo permaneceram inalterados (p > 0,05). As moléculas de adesão vascular e intercelular aumentaram de forma semelhante após as sessões de caminhada máxima e submáxima (momento, p = 0,001). Conclusões: Nos pacientes com a DAP sintomática, a caminhada submáxima, mas não a máxima, reduziu a PA pós-exercício, enquanto a caminhada máxima manteve a sobrecarga cardíaca elevada durante o período de recuperação. Por outro lado, as sessões de caminhada máxima e submáxima aumentaram a FC, o equilíbrio simpatovagal cardíaco e a inflamação pós-exercício de forma semelhante, enquanto não alteraram a biodisponibilidade de ON e o estresse oxidativo pós-exercício.

Abstract Background: Although maximal and submaximal walking are recommended for patients with peripheral artery disease (PAD), performing these exercises may induce different physiological responses. Objectives: To compare the acute effects of maximal and submaximal walking on post-exercise cardiovascular function, regulation, and associated pathophysiological processes in patients with symptomatic PAD. Methods: Thirty male patients underwent 2 sessions: maximal walking (Gardner's protocol) and submaximal walking (15 bouts of 2 minutes of walking separated by 2 minutes of upright rest). In each session, blood pressure (BP), heart rate (HR), cardiac autonomic modulation (HR variability), forearm and calf blood flows (BF), vasodilatory capacity (reactive hyperemia), nitric oxide (NO), oxidative stress (lipid peroxidation), and inflammation (four markers) were measured pre- and post-walking. ANOVAs were employed, and p < 0.05 was considered significant. Results: Systolic and mean BP decreased after the submaximal session, but they increased after the maximal session (interactions, p < 0.001 for both). Diastolic BP did not change after the submaximal session (p > 0.05), and it increased after maximal walking (interaction, p < 0.001). HR, sympathovagal balance, and BF increased similarly after both sessions (moment, p < 0.001, p = 0.04, and p < 0.001, respectively), while vasodilatory capacity, NO, and oxidative stress remained unchanged (p > 0.05). Vascular and intercellular adhesion molecules increased similarly after both maximal and submaximal walking sessions (moment, p = 0.001). Conclusions: In patients with symptomatic PAD, submaximal, but not maximal walking reduced post-exercise BP, while maximal walking maintained elevated cardiac overload during the recovery period. On the other hand, maximal and submaximal walking sessions similarly increased post-exercise HR, cardiac sympathovagal balance, and inflammation, while they did not change post-exercise NO bioavailability and oxidative stress.

Correlaciones entre el test de velocidad en 4 metros y el test de caminata en 6 min en enfermos respiratorios crónicos / Correlations between the 4 meter speed test and the 6-minute walking test in chronic respiratory patients

Resumen La prueba de velocidad de marcha en 4 metros (T4M) es considerada sustituto de la caminata en 6 min (TC6M) en EPOC. Sin embargo, no ha sido bien investigada en otras enfermedades respiratorias. Durante un año estudiamos pacientes que concurrieron a nuestra Unidad para realizar el TC6M midiendo la velocidad alcanzada en 4 metros, 2 h previo a realizar el TC6M. De 162 pacientes 99 eran mujeres. La edad media fue de 65 años, peso de 73 kg, talla de 158 cm, IMC 29,4 kg/m2. 36% tenían fibrosis pulmonar idiopática, 17% EPOC, GOLD IV,11% EPOC, GOLD III, 12% apnea de sueño y 12% otras enfermedades. No hubo diferencia para los distintos diagnósticos en ambos tests. La distancia media en TC6Mfue 368,5 m la velocidad: 1,01 m/s en T4M.Hubo una correlación positiva significativa entre ambos test: alto rendimiento en T4M es equivalente a un alto rendimiento en el TC6M. Hubo correlación negativa con la edad y positiva con la estatura. Al año de seguimiento 16 pacientes habían fallecido, siendo estos los que habían obtenido los más bajos rendimientos en ambos tests (T4M: 0,69 m/s y 248,1 m en TC6M) La posibilidad de sobrevida cayó a 20% en aquellos individuos que alcanzaron una velocidad inferior a 0,69 m/s. Es posible sustituir el TC6M por el T4M en pacientes con diferentes patologías respiratoria, podemos predecir la muerte por cualquier causa si un sujeto camina a una velocidad ≤ 0,69 m/s, T4M es barato y fácil de realizar en atención primaria, sirviendo como evaluación de riesgo para referir a un centro más complejo.

4-Meter Gait Speed Test (4MGST) a frailty test, is considered a surrogate for the 6-Minute Walk Test (6MWT) in COPD. However, it has not been investigated in other respiratory conditions. Over a year, we studied patients attending our Unit for evaluation with 6MWT, measuring the speed they achieved walking 4 m, 2 h before performing 6MWT. 162 patients (99 women) were studied; series' mean values were: age 65 years-old; body weight, 73 kg; height, 158 cm and BMI, 29.4 kg/m2. 36% of them had idiopathic pulmonary fibrosis, 17% GOLD IV COPD, 11% GOLD III COPD, 12% pulmonary arterial hypertension, 12% obstructive apnea-hypopnea syndrome, and 12% other conditions. ANOVA showed no difference between diagnostic categories for both test. Average score in 6MWT was 368.5 m and 1.01 m/s in 4MGST. Pearson correlation coefficient revealed significant positive correlation between results of both tests: high score in 4MGST is equivalent to high score in 6MWT. There was negative correlation with age and positive correlation with height. At one year follow-up, 16 patients had died. They obtained significantly lower scores in both tests (4MGST: 0.69 m/s and 6MWT: 248.1 m) Survival chance fell to 20% for patients walking slower than 0.69 m/s. It is possible to replace TC6M with T4M in patients with different respiratory pathologies, we can predict death for any cause if a subject walked at ≤ speed at 0.69 m/s. T4M is cheap and easy to perform in primary care, serving as a risk assessment to refer to a more complex center.

Changes in executive function and gait in people with mild cognitive impairment and Alzheimer disease / Alterações na função executiva e na marcha em pessoas com comprometimento cognitivo leve e doença de alzheimer

ABSTRACT. Changes in executive function and motor aspects can compromise the prognosis of older adults with mild cognitive impairment (MCI) and favor the evolution to dementia. Objectives: The aim of this study was to investigate the changes in executive function and gait and to determine the association between changes in these variables. Methods: A 32-month longitudinal study was conducted with 40 volunteers: 19 with preserved cognition (PrC), 15 with MCI and 6 with Alzheimer disease (AD). Executive function and gait speed were assessed using the Frontal Assessment Battery, the Clock-Drawing test and the 10-meter walk test. For data analysis, the Pearson product-moment correlation, two-way repeated-measures ANOVA, and chi-square were conducted. Results: After 32 months, an improvement in the executive function was found in all groups (p=0.003). At baseline, gait speed was slower in individuals with MCI and AD compared to those with PrC (p=0.044), that was maintained after the follow-up (p=0.001). There was significant increase in number of steps in all groups (p=0.001). No significant association was found between changes in gait speed and executive function. Conclusions: It should be taken into account that gait deteriorates prior to executive function to plan interventions and health strategies for this population.

RESUMO. Alterações na função executiva e nos aspectos motores podem comprometer o prognóstico de idosos com comprometimento cognitivo leve (CCL) e favorecer a evolução para demência. Objetivos: O objetivo deste estudo foi investigar alterações na função executiva e na marcha e determinar a associação entre alterações nessas variáveis. Método: Foi realizado um estudo longitudinal de 32 meses com 40 voluntários: 19 com cognição preservada (PrC), 15 com CCL e 6 com doença de Alzheimer (DA). A função executiva e a velocidade da marcha foram avaliadas por meio de bateria de avaliação frontal, do teste de desenho do relógio e do teste de caminhada de 10 metros. Para a análise de dados, o coeficiente de correlação produto-momento de Pearson, ANOVA de medidas repetidas bidirecional e o qui-quadrado foram realizados. Resultados: Após 32 meses, houve melhora na função executiva em todos os grupos (p=0,003). No início do estudo, a velocidade da marcha foi mais lenta nos indivíduos com CCL e DA em comparação com os PrC (p=0,044), que foi mantida após o acompanhamento (p=0,001). Houve aumento significativo no número de etapas em todos os grupos (p=0,001). Não foi encontrada associação significativa entre alterações na velocidade da marcha e função executiva. Conclusões: Deve-se levar em consideração que a marcha se deteriora antes da função executiva para planejar intervenções e estratégias de saúde para essa população.

Síndrome de risco cognitivo motor em pessoas idosas de um serviço de saúde do Distrito Federal: estudo transversal / Motoric cognitive risk syndrome in older adults at a health service in the Distrito Federal: a cross-sectional study

Resumo Objetivo Verificar a prevalência da síndrome de risco cognitivo motor (SRCM) em pessoas idosas do Distrito Federal (DF), Brasil, que frequentaram os serviços de saúde de uma unidade de referência em Geriatria e Gerontologia, comparar os grupos de idosos com e sem a síndrome e investigar os possíveis fatores associados ao desenvolvimento dessa síndrome. Método Trata-se de estudo observacional transversal analítico, desenvolvido com idosos (idade ≥60 anos) com marcha independente e sem alterações cognitivas graves, que possuíam registro de dados sociodemográficos, avaliação cognitiva, capacidade funcional e velocidade de marcha em prontuários datados de 2017 a 2019. A análise dos dados foi expressa em média e desvio-padrão, frequência e percentual, e em odds ratios (OR) com intervalos de confiança de 95%. As comparações entre os grupos com e sem a SRCM foram feitas por meio dos testes: qui-quadrado, U de Mann-Whitney e t de Student. Resultados Não houve diferenças significativas na comparação das variáveis entre os grupos. A prevalência da SRCM na população estudada foi de 24%. Nenhum dos fatores analisados demonstrou associação com a presença da síndrome. Conclusão A prevalência da SRCM na amostra foi de 24% e mostrou-se mais alta na população do DF quando comparada as populações estudadas em outros países. Não houve diferenças entre os grupos de idosos com e sem a síndrome, e os fatores associados não foram encontrados. O rastreio da síndrome é de extrema relevância, pois a partir desses achados pode-se desenvolver mecanismos para a prevenção de demência em idosos.

Abstract Objective To verify the prevalence of the motoric cognitive risk syndrome (MCR) in older adults from the Distrito Federal (DF), Brazil, who attended the health services of a reference unit in Geriatrics and Gerontology, compare groups of older adults with and without the syndrome and investigate the possible associated factors for the development of this syndrome. Method This is an observational cross-sectional analytical study, developed with older adults (age ≥ 60 years) with independent gait and without severe cognitive dysfunctions, who had a record of sociodemographic data, cognitive assessment, functional capacity and gait speed in medical records dated 2017 to 2019. Data analysis was expressed as mean and standard deviation, frequency and percentage, and odds ratios (OR) with 95% confidence intervals. Comparisons between groups with and without MCR were made using the chi-square, U Mann Whitney and t-student tests. Results There were no significant differences in the comparison of variables between groups. The prevalence of MCR in the studied population was 24%. None of the factors analyzed showed an association with the presence of the syndrome. Conclusion The prevalence of MCR in the sample was 24% and was shown to be higher in the population of the DF when compared to the populations studied in other countries. There were no differences between the groups of older adults with and without the syndrome, and the associated factors were not found. Screening for the syndrome is hugely relevant, as, from these findings, mechanisms can be developed to prevent dementia in old people.

Associação entre cognição, velocidade da marcha e habilitação veicular em idosos / Relación entre cognición, velocidad de la marcha y licencia de conducir en adultos mayores / Association between cognition, gait speed and vehicle habilitation in elderly people

Resumo Objetivo: Investigar a associação entre cognição, velocidade da marcha e resultado final da habilitação veicular de idosos candidatos à Carteira Nacional de Habilitação. Métodos: Estudo quantitativo de corte transversal desenvolvido em 12 clínicas de trânsito de Curitiba/Paraná/Brasil. A amostra do tipo probabilística foi constituída por 421 idosos (≥ 60 anos). Para a coleta de dados foram aplicados o Mini-Exame do Estado Mental (MEEM), teste de velocidade da marcha e realizadas consultas ao formulário Registro Nacional de Condutores Habilitados. A relação entre as variáveis foi identificada por meio do teste de regressão linear múltipla, método stepwise, utilizando-se o programa estatístico R versão 3.4.0. Resultados: Observou-se que, ao aumentar o escore no MEEM em uma unidade a chance do idoso ser considerado inapto temporariamente para dirigir diminui em 54,96% (95%; IC 28,47% - 92,69%; p<0,0001), e ao aumentar uma unidade no escore do MEEM houve um aumento na velocidade da marcha (VM) de 0,0091 (95%; IC 0,0005 - 0,0174; p=0,0366). Conclusão: O elevado escore no MEEM diminuiu a probabilidade do idoso ser considerado inapto temporariamente para dirigir veículos automotores e houve uma tendência de aumento da VM com o aumento dos escores do MEEM. A VM é um importante indicador a ser avaliado em idosos motoristas, logo, é um tópico a ser incluído nas avaliações das clínicas de trânsito, assim como o rastreamento cognitivo, fundamental para avaliar um conjunto de atividades mentais necessárias à direção veicular segura.

Resumen Objetivo: Investigar la relación entre cognición, velocidad de la marcha y obtención del permiso de conducir en adultos mayores que tramitan la licencia de conducir. Métodos: Estudio cuantitativo de corte transversal llevado a cabo en 12 centros médicos de evaluación de tránsito de Curitiba, estado de Paraná, Brasil. La muestra probabilística fue formada por 421 adultos mayores (≥ 60 años). Para la recolección de datos se aplicó el Mini Examen del Estado Mental (MEEM), la prueba de velocidad de la marcha y se realizaron consultas al formulario del Registro Nacional de Conductores Habilitados. La relación entre las variables fue identificada mediante la prueba de regresión lineal múltiple, método stepwise, con el programa de estadística R versión 3.4.0. Resultados: Se observó que, al aumentar la puntuación del MEEM una unidad, la probabilidad de que el adulto mayor sea considerado no apto temporalmente para conducir se redujo un 54,96 % (95 %; IC 28,47 % - 92,69 %; p<0,0001), y al aumentar una unidad la puntuación del MEEM, hubo un aumento en la velocidad de la marcha (VM) de 0,0091 (95 %; IC 0,0005 - 0,0174; p=0,0366). Conclusión: La puntuación del MEEM elevada redujo la probabilidad de que el adulto mayor sea considerado no apto temporalmente para conducir automóviles y hubo una tendencia de aumento de la VM con un aumento de la puntuación del MEEM. La VM es un indicador importante que debe ser evaluado en adultos mayores conductores. Por lo tanto, es un tema que deberá ser incluido en las evaluaciones de los centros médicos de evaluación de tránsito, así como también el rastreo cognitivo, fundamental para analizar un conjunto de actividades mentales necesarias para una conducción vehicular segura.

Abstract Objective: To investigate the association between cognition, gait speed and the result of vehicle habilitation of elderly candidates for the National Driver's License. Methods: Quantitative cross-sectional study developed in 12 traffic agencies in Curitiba, state of Paraná, Brazil. The probabilistic sample consisted of 421 elderly people (≥ 60 years). The Mini-Mental State Examination (MMSE), gait speed testing and consultations to forms of the National Qualified Drivers Registration were used for data collection. The relationship between variables was identified through the multiple linear regression test, stepwise method, using the statistical program R, version 3.4.0. Results: When increasing a unit in the MMSE score, the chance of the elderly person being considered as temporarily unfit to drive decreased by 54.96% (95% CI; 28.47% - 92.69%I; p<0.0001). When increasing a unit in the MMSE score, there was an increase in gait speed (GS) of 0.0091 (95% CI: 0.0005 - 0.0174; p=0.0366). Conclusion: The high MMSE score decreased the probability of the elderly participant being considered temporarily unfit to drive motor vehicles. There was a trend of higher GS with the increase in MMSE scores. As GS is an important indicator to be assessed in elderly drivers, this topic should be included in evaluations of traffic agencies, as well as cognitive screening, which is essential to assess a set of mental activities necessary for safe driving.

Effects of Shoe Type and Walking Speed on Knee Joint Loads / 医用生物力学

Objective To investigate the effects of shoes type (barefoot, ordinary running shoes, minimalist shoes) and walking speed (jogging, walking at normal speed) on biomechanical parameters of knee joint, so as to provide theoretical reference for scientific fitness. Methods Vicon three-dimensional （3D） motion capture system and Kistler 3D force plate were used to collect biomechanical parameters of lower limbs from 10 subjects during walking at different speed with different shoes. Two-way (2 walking conditions × 3 shoe conditions) repeated measures analysis of variance was used to statistically analyze each dependent variable. Results Compared with jogging, the lateral excursion of plantar center of pressure (COP) was greater, the moment arm in frontal plane, the adduction moment and peak loading rate of knee joint were smaller, but the angular impulse of knee joint in frontal plane was greater. Compared with ordinary running shoes, the stride length was decreased, the lateral excursion of COP was greater, and the moment arm of knee joint in frontal plane, the knee adduction moment, the peak load rate and the angular impulse of knee joint in frontal plane were smaller. Conclusions In order to reduce the angular impulse and peak loading rate of knee joint in frontal plane, it is recommended to jog with small strides for ordinary people with minimalist footwear.

The relationship between knee muscle strength and walking ability after incomplete lumbar spinal cord injury / 中华物理医学与康复杂志

Objective:To explore any correlation between knee muscle strength and walking ability after an incomplete lumbar spinal cord injury and the factors influencing walking ability.Methods:Twenty-seven persons with an incomplete lumbar spinal cord injury were tested. Their bilateral quadriceps and hamstring muscle strength and peak torque during knee extension and flexion were assessed. They completed the 10m walking time test (10MWT) and each person′s WWISCI II spinal cord injury walking index was evaluated. Spearman correlations among the data were computed and stepwise regression was used to analyze the factors significantly influencing the 10MWT and WISCI II results.Results:The average hamstring strength was significantly negatively correlated with the 10MWT times and WISCI II ratings. Hamstring torque also was negatively correlated with the 10MWT times, but positively correlated with the WISCI II ratings. The 10MWT times and WISCI II ratings were significantly inter-correlated. Hamstring strength was the best predictor of 10MWT times (accounting for 63% of the variance) and WISCI II ratings (64%), but quadriceps strength was also a secondary predictor.Conclusions:Knee muscle strength is a useful predictor of 10MWT times and WISCI II ratings after incomplete lumbar spinal cord injury. It can predict early walking ability to some extent.

Predictors of walking speed in older people after stroke / Preditores da velocidade de marcha em idosos comunitários pós acidente vascular encefálico

Introdução: as medidas de desempenho da função física podem prever incidência futura de incapacidade, dependência em atividades de vida diária, institucionalização e morte em idosos após Acidente Vascular Encefálico. Embora existam estudos verificando o efeito da idade na velocidade de marcha e na incapacidade, ainda existem lacunas significativas na literatura com idosos após Acidente Vascular Encefálico. Objetivo: verificar quais são os possíveis preditores da velocidade de marcha em idosos após Acidente Vascular Encefá- lico. Métodos: estudo transversal, em que foi avaliada: velocidade de marcha (teste de caminhada de 10 metros ­ TC10m), força de flexores plantares e extensores de joelho do lado parético (Teste do Esfigmomanômetro Modificado ­ TEM), mobilidade (Time up and Go ­ TUG) e depressão (Escala de Depressão Geriátrica ­ GDS). Foi utilizada a regressão linear para verificar quais preditores explicariam a velocidade de marcha. Resultados: 60 indivíduos foram incluídos, idade média de 71 ± 7 anos, com TC10m de 0,7 ± 0,3 m/s, força de flexores plantares de 133 ± 66 mmHg e força de extensores de joelho de 198 ± 62 mmHg, TUG de 19 ± 10 s e GDS 6 ± 3 pontos. A força de flexores plantares do lado parético explicou 33% da variação da velocidade de marcha. Quando a mobilidade foi incluída, a variância aumentou para 43%. Conclusão: a força dos flexores plantares do lado parético e a mobilidade são preditores e influenciam diretamente a velocidade de marcha nos idosos após o Acidente Vascular Encefálico.(AU)

Introduction: performance-based measures of physical function can predict the future incidence of disability, dependence in activities of daily living, institutionalization, and death in older people after stroke. Although there have been previous studies examining the effect of age on walking speed and disability, significant gaps still exist in the literature with older people after stroke. Purpose: to verify the possible predictors of the walking speed in elderly individuals after stroke. Methods: cross-sectional study, where it was evaluated: walking speed (10-meter walking test ­ 10 MWT), plantar flexor and knee extensor strength of the paretic side (Modified Sphygmomanometer Test ­ MST), mobility (Time up and Go ­ TUG), and depression (Geri- atric Depression Scale ­ GDS). It was used linear regression to verify which predictors would explain the walking speed (α=0,05). Results:60 individuals were included with a mean age of 71±7 years, with 10MWT of 0.7±0.3m/s, plantar flexor strength of 133±66mmHg and knee extensor strength of 198±62mmHg, TUG of 19±10s, and GDS 6±3 points. The plantar flexor strength of the paretic side explained 33% of the variance of the walking speed. When mobility was included, variance increased to 43%. Conclusion: plantar flexors strength of the paretic side and mobility are predictors and have a direct influence on the walking speed in older people after stroke.(AU)

Association between walking and strength of lower limbs after chronic stroke / Associação entre velocidade de marcha e força de membros inferiores após acidente vascular encefálico crônico

Certain muscle groups strength directly influence walking speed (WS), and the lower strength of the paretic side is significantly associated with lower WS of individuals after stroke. Studies that have investigated the association between the average of lower limb strength and the WS in individuals are scarce. Therefore, it is important to determine whether the strength could explain walking performance due to some muscle weakness could be compensated by the strength of others, mainly because all muscles act in group, not isolated. Objective: To investigate the association between WS and lower limbs muscle strength, and to identify whether an individual muscle group or the average strength of lower limb would best predict WS and walking speed reserve (WSR) in individuals with stroke. Methods: Sixty-four community-dwelling individuals with chronic stroke have their maximum isometric strength (hip flexors/extensors/abductors, knee flexors/extensors, and ankle dorsiflexors/plantarflexors) and self-selected and fast WS (10m walk test) measured. WSR was considered as the difference between the fast and self-selected speed. Results: Average strength of the paretic limb accounted for 19% and 20% of the variance in self-selected and fast WS, respectively. Plantarflexor strength of the paretic, knee and hip flexors of the non-paretic side explained alone 27% of the WSR scores and plantarflexor strength of the paretic side alone explained 15%.Conclusion: Average muscle strength of the paretic side contributed to self-selected and fast WS. Plantarflexor strength of the paretic side, knee and hip flexors of the non-paretic side contributed with the WSR of chronic stroke individuals

Estudos que investigam a associação entre a força média de membro inferior e a velocidade de marcha em indivíduos pós AVE são escassos. Logo, é importante determinar se a força muscular média pode explicar o desempenho na marcha, visto que os músculos agem em grupo. Objetivo: Investigar a associação entre velocidade de marcha e força muscular de membros inferiores, e identificar se um grupo muscular individual ou a força média de membros inferiores poderia predizer a velocidade de marcha e a velocidade de reserva (VR) em indivíduos pós AVE crônico. Métodos: 64 indivíduos deambuladores comunitários pós AVE crônico passaram por avaliação de força isométrica máxima (flexor/extensor/abdutor de quadril, flexor/extensor de joelho e flexor plantar/dorsoflexor de tornozelo) e velocidade de marcha habitual e máxima (Teste de Caminhada de 10 metros). A VR foi considerada a diferença entre velocidade de marcha máxima e habitual. Resultados: A força média do lado parético foi responsável por 19% e 20% da variância na velocidade de marcha habitual e máxima respectivamente. A força de flexor plantar do lado parético e flexor de quadril e joelho do lado não parético explicaram 27% da VR e força de flexor plantar do lado parético explicou 15%. Conclusão: A força média do lado parético contribuiu para a velocidade de marcha habitual e máxima. a força de flexor plantar do lado parético, flexor de quadril e joelho do lado não parético contribuíram para a VR de indivíduos pós AVE crônico