ABSTRACT
Objective: To estimate the hypothetical effects of substituting time spent in moderate-to-vigorous physical activity (MVPA) and time spent in sedentary behavior (SB) and their associations with diabetes. Methods: A cross-sectional study using exploratory survey methods was performed in Alcobaça city in the state of Bahia, Brazil in the year 2015. A total of 473 older adults (aged ≥60 years) participated in the study. Diabetes mellitus, time MVPA, and SB were assessed in a self-reported manner. The Poisson regression was used to verify the hypothetical effects of the substitution of MVPA with SB on diabetes. Results: The substitution of the time in MVPA with time in SB showed higher prevalence ratios of diabetes. Conversely, the substitution of the time in SB proved to be a protective factor, with risks reduced by between 4% and 19%. Discussion: The substitution of the time spent in MVPA with the same amount of time spent on SB can lead to an increase in the probability of diabetes, and a longer reallocation time corresponded to a greater risk.
ABSTRACT
Disability is negatively associated with the health of older adults, and it can be mediated by healthy lifestyles and behaviors throughout one's life. In this context, understanding the interrelationships between sedentary behavior, physical activity and functionality may assist in the implementation of effective public health actions. Thus, the aim of the present study was to investigate the relationships between both physical activity and sedentary behavior and functionality in older adults and the possible mediators. The variables analyzed were selected according to the content analysis of International Classification of Functioning, Disability and Health model, and included activity, participation, health conditions, body functions and structures, environmental factors and personal factors. 419 individuals participated in the study. Physical activity was directly associated with disability in instrumental activities of daily living (IADL), and the association was mediated by self-esteem, aerobic endurance, and agility/balance. Sedentary behavior was indirectly associated with IADL disability, and the association was mediated by aerobic resistance, nutritional status, and agility/balance. Regarding the basic activities of daily living (BADL), physical activity showed an indirect association mediated by aerobic resistance and IADL. The association of sedentary behavior with BADL was mediated by aerobic resistance and lower limb flexibility. These results reinforce the idea that functionality is multidimensional, and the mediating factors must be considered when strategies for promoting physical activity and reducing sedentary behavior are designed.
Subject(s)
Activities of Daily Living , Disabled Persons , Exercise , Sedentary Behavior , Aged , Aged, 80 and over , Brazil , Cross-Sectional Studies , Female , Humans , Male , Middle AgedABSTRACT
The aim of this study was to identify the amount of time spent in sedentary behavior that may be critically related to functional disability in older adults. A cross-sectional study was conducted with a random sample of 624 older adults (65.1% women) aged 60 to 96 years. Perceived limitations in instrumental activities of daily living were used as indication of functional disability. Time spent in sedentary behavior was assessed using the International Physical Activity Questionnaire (IPAQ). The prevalence of functional disability was 29.4%. The mean total time spent in sedentary behavior was 576.51 ± 5.14 min/day. Receiver Operating Characteristic (ROC) curves were used to identify cut-points for time spent in sedentary behavior that could discriminate functional disability in older adults. The results suggested that spending > 600.00 min/day and > 614.00 min/day in sedentary behavior, for men and women, respectively, was a discriminator for functional disability in the current study. These cut-points can be used to identify older adults who are most vulnerable to functional disability in future studies
O objetivo deste estudo foi identificar pontos de corte para o tempo gasto em comportamento sedentário que podem potencialmente discriminar a presença de incapacidade funcional em idosos. Um estudo transversal foi realizado com uma amostra aleatória de 624 idosos (65,1% mulheres) com idade entre 60 e 96 anos. As limitações percebidas nas atividades instrumentais da vida diária foram utilizadas como indicação de incapacidade funcional. O tempo gasto no comportamento sedentário foi avaliado usando o Questionário Internacional de Atividade Física (IPAQ). A prevalência de incapacidade funcional foi de 29,4%. A média do tempo total despendido em comportamento sedentário foi de 576,51 ± 5,14 minutos/dia. As curvas de ca-racterística operativa do receptor (ROC) foram usadas para identificar pontos de corte para o tempo gasto em comportamento sedentário que discriminassem a incapacidade funcional em idosos. Os resultados sugeriram que despender > 600,00 min/dia e > 614,00 min/dia em comportamento sedentário, para homens e mulheres, respectivamente, foram discriminadores de incapacidade funcional no presente estudo. Esses pontos de corte podem ser usados para identificar os idosos que estão em maior vulnerabilidade à incapacidade funcional em estudos futuros
