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1.
Clinics ; 70(5): 333-338, 05/2015. graf
Article in English | LILACS | ID: lil-748272

ABSTRACT

OBJECTIVE: This study investigated the acute hemodynamic responses to multiple sets of passive stretching exercises performed with and without the Valsalva maneuver. METHODS: Fifteen healthy men aged 21 to 29 years with poor flexibility performed stretching protocols comprising 10 sets of maximal passive unilateral hip flexion, sustained for 30 seconds with equal intervals between sets. Protocols without and with the Valsalva maneuver were applied in a random counterbalanced order, separated by 48-hour intervals. Hemodynamic responses were measured by photoplethysmography pre-exercise, during the stretching sets, and post-exercise. RESULTS: The effects of stretching sets on systolic and diastolic blood pressure were cumulative until the fourth set in protocols performed with and without the Valsalva maneuver. The heart rate and rate pressure product increased in both protocols, but no additive effect was observed due to the number of sets. Hemodynamic responses were always higher when stretching was performed with the Valsalva maneuver, causing an additional elevation in the rate pressure product. CONCLUSIONS: Multiple sets of unilateral hip flexion stretching significantly increased blood pressure, heart rate, and rate pressure product values. A cumulative effect of the number of sets occurred only for systolic and diastolic blood pressure, at least in the initial sets of the stretching protocols. The performance of the Valsalva maneuver intensified all hemodynamic responses, which resulted in significant increases in cardiac work during stretching exercises. .


Subject(s)
Humans , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Benzodioxoles/pharmacology , Colonic Neoplasms/drug therapy , Isoquinolines/pharmacology , Protein Kinase Inhibitors/pharmacology , Thiophenes/pharmacology , Topoisomerase I Inhibitors/pharmacology , Urea/analogs & derivatives , DNA Replication/drug effects , Drug Synergism , Protein Kinases/metabolism , Protein Serine-Threonine Kinases/metabolism , Urea/pharmacology
2.
Clinics ; 66(3): 459-464, 2011. ilus
Article in English | LILACS | ID: lil-585958

ABSTRACT

BACKGROUND: The respiratory pattern is often modified or even blocked during flexibility exercises, but little is known about the cardiovascular response to concomitant stretching and the Valsalva maneuver (VM) in healthy subjects. OBJECTIVES: This study evaluated the heart rate (HR), systolic blood pressure (SBP), and rate-pressure product (RPP) during and after large and small muscle group flexibility exercises performed simultaneously with the VM. METHODS: Asymptomatic volunteers (N = 22) with the following characteristics were recruited: age, 22 ± 3 years; weight, 73 ± 6 kg; height, 175 ± 5 cm; HR at rest, 66 ± 9 BPM; and SBP at rest, 113 ± 10 mmHg. They performed two exercises: four sets of passive static stretching for 30 s of the dorsi-flexion (DF) of the gastrocnemius and the hip flexion (HF) of the ischio-tibialis. The exercises were performed with (V+) or without (V-) the VM in a counterbalanced order. The SBP and HR were measured, and the RPP was calculated before the exercise session, at the end of each set, and during a 30-min post-exercise recovery period. RESULTS: The within-group comparisons showed that only the SBP and RPP increased throughout the sets (p<0.05), but no post-exercise hypotension was detected. The between-group comparisons showed that greater SBP increases were related to the VM and to a larger stretched muscle mass. Differences for a given set were identified for the HR (the HFV+ and HFV- values were higher than the DFV+ and DFV- values by approximately 12 BPM), SBP (the HFV+ value was higher than the DFV+ and DFV- values by approximately 12 to 15 mmHg), and RPP (the HFV+ value was higher than the HFV- value by approximately 2000 mmHGxBPM, and the HFV+ value was higher than the DFV+ and DFV- values by approximately 4000 mmHGxBPM). CONCLUSION: Both the stretched muscle mass and the VM influence acute cardiovascular responses to multiple-set passive stretching exercise sessions.


Subject(s)
Adult , Humans , Male , Young Adult , Blood Pressure/physiology , Exercise/physiology , Heart Rate/physiology , Muscle, Skeletal/physiology , Valsalva Maneuver/physiology , Analysis of Variance , Exercise Test/methods , Time Factors
3.
Braz. j. phys. ther. (Impr.) ; 14(5): 390-395, Sept.-Oct. 2010. tab
Article in Portuguese | LILACS | ID: lil-570718

ABSTRACT

CONTEXTUALIZAÇÃO: Os estudos sobre a relação entre prática de exercícios e bem-estar psicológico de pacientes com vírus da imunodeficiência humana (HIV) são raros. OBJETIVO: Investigar a influência de programa de condicionamento físico sobre a satisfação com a própria vida e sobre a função imunológica. MÉTODOS: Para tal análise, 29 pacientes soropositivos (idade: 45±2 anos; índice de massa corporal (IMC): 22,8±1,0 kg/m2; TCD4: 20,5±2,0 por cento), foram divididos em grupo controle (GC, n=10) e grupo experimental (GE, n=19). O GE participou durante 12 semanas de programa de exercícios que combinavam exercícios aeróbios, força e flexibilidade (três vezes/semana; aeróbio-30min: carga em watts equivalente a 150bpm-PWC150; força-50min: três séries de 12 repetições em cinco exercícios a 60-80 por cento 12 RM; flexibilidade-10min: duas séries de 30s na máxima amplitude em oito exercícios). A função imunológica foi avaliada por contagem absoluta e relativa das células TCD4 (citometria de fluxo),e a satisfação de vida, por meio do Índice de Satisfação de Vida (ISV). RESULTADOS: A análise de variância (ANOVA) não identificou alteração significativa para os linfócitos TCD4 em ambos os grupos, apesar da tendência à elevação no GE (16 por cento, p=0,19). Houve melhora significativa no ISV (≈15 por cento, P<0,05) para o GE, mas não para o GC. CONCLUSÃO: Um programa de condicionamento físico de intensidade moderada melhorou a percepção de satisfação de vida dos pacientes com HIV observados, sem acarretar prejuízos imunológicos.


BACKGROUND: There is a lack of research about the relationship between exercise and the psychological well-being of HIV-infected (Human Immunodeficiency Virus) patients. OBJECTIVE: The objective of this study was to investigate the influence of a physical training program on life satisfaction and on the immunological function in HIV-patients. METHODS: A total of 29 HIV-seropositive patients [age: 45±2 yrs; Body Mass Index (BMI): 22.8±1.0 kg/m² ; TCD4: 20.5±2.0 percent] were allocated to the control (CG, n=10) and to the experimental groups (EG, n=19). The EG participated in an exercise program combining aerobic, strength, and flexibility exercises for a period of 12 weeks [3 times/week of 30 min of aerobic exercise (workload corresponding to 150 bpm-PWC150); 50 min of strength exercises (3 sets of 12 repetitions in 5 exercises at 60-80 percent 12 RM); and 10 min of flexibility exercises (2 sets of 30 seconds at maximal range of motion of 8 exercises)]. The immunological function was assessed by flow citometry [absolute and relative TCD4 cells counting] and the life satisfaction was assessed by the Life Satisfaction Index (LSI). RESULTS: The analysis of variance (ANOVA) showed no significant differences for relative and absolute CD4 T counts for both groups, however, a slight enhancement trend in the EG [16 percent, p=0.19] was observed. There was a significant improvement of LSI [approximately 15 percent; P<0.05] in EG, but not for CG. CONCLUSION: A physical activity program of moderate intensity improved life satisfaction perception in HIV-infected patients with no immunological function impairment.


Subject(s)
Female , Humans , Male , Middle Aged , Exercise , HIV Infections/immunology , HIV Infections/psychology , Personal Satisfaction
4.
Rev. bras. ativ. fís. saúde ; 5(2): 5-16, abr.-jun. 2000. tab, graf
Article in Portuguese | LILACS | ID: lil-283937

ABSTRACT

O duplo-produto é preditor indireto do consumo de oxigênio miocárdico, consistindo em parâmetro de risco cardiovascular no exercício. O estudo observou freqüência cardíaca (FC), pressão arterial sistólica (PAS), pressão arterial diastólica (PAD) E DUPLI-PRODUTO (DP), durante exercícios dinâmicos contra-resitência (EC) e aeróbio de intensidade moderada (EA), em 18 indivíduos (idade = 23ñ6 anos) aparentemente saudáveis. Realizarem-se testes de força com IRM, 6RM E 20rm (cadeira extensora) e um aeróbio submáximo (cicloergômetro, 20 min 75-80% da FC de reserva). As medidas para EC foram registradas entre as duas últimas repetiçöes. Para EA, anotaram-se as variáveis no 5°, 10°, 15° e 20°min. Compararam-se as resposta de FC, PAS, PAD e DP por meio de ANOVA de uma entrada, seguida de verifiçäo post-hoc de Scheffé (p<0,05). Os resultados permitiram ordenar hierarquicamente as respostas das variáveis nas situaçöes de exercício: FC - repouso <1RM=6RM<20RM

Subject(s)
Humans , Male , Female , Cardiovascular Physiological Phenomena , Exercise Test , Heart Rate , Analysis of Variance , Physical Endurance
5.
Rev. bras. med. esporte ; 5(6): 212-220, nov.-dez. 1999. tab
Article in Portuguese | LILACS | ID: lil-325163

ABSTRACT

Sabe-se pouco sobre os efeitos do envelhecimento na recuperaçäo pós-esforço (RP). O estudo observou a RP em 15 idosos (GI, idade= 61 ± 1 anos) e 15 jovens (GJ, idade= 22 ± 2 anos) após atividades de três intensidades (IE) em cicloergômetro. Realizaram-se testes máximos, com incremento de 30W/min para GJ e de 25W/min após detecçäo de steadystate para GI. Posteriormente, os grupos pedalaram a 40 e 75o da carga máxima, respectivamente, 25 e 15 minutos. Foram acompanhados VOz, VCO, Vç e FC nos primeiros 15 minutos da RP nas três IE. O tratamento dos resultados compreendeu: a) teste de ajustamento das curvas experimentais a equações com uma ou duas exponenciais; b) cálculo do valor dos componentes para a equaçäo mais ajustada; c) análise das constantes extraídas. Os desvios de ajustamento foram inferiores para uma curva de duas exponenciais, definida por integral de tempo na forma A/a +B/(3. A/a designa a componente rápida da recuperaçäo e B/(3 a lenta. Quando comparados os grupos, GI mostrou constantes maiores que GJ, evidenciando recuperaçäo mais lenta nas duas fases. Subdividindo os componentes, em GI e GJ as constantes de velocidade de recuperaçäo rápida (1/a) para VO, e VC02 foram semelhantes nas três IE, enquanto para a constante lenta (I/(3), os valores para GI indicaram maior dependência em relaçäo à carga. A recuperaçäo da FC revelou-se extremamente dependente da IE para GJ. Para GI isso foi menos evidente, talvez...


Subject(s)
Adult , Middle Aged , Humans , Male , Physical Exertion/physiology , Exercise Tolerance , Exercise Test/methods , Heart Rate/physiology , Anaerobic Threshold/physiology
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