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ABSTRACT BACKGROUND: Compared to young individuals, older adults participate more in sedentary behavior (SB) and less in physical activity (PA). These behaviors are associated with numerous adverse health factors. OBJECTIVE: The purpose of the study was to examine the hypothetical effects of substituting time spent sleeping, performing SB, and performing moderate-to-vigorous physical activity (MVPA) on depressive symptomatology in older adults. DESIGN AND SETTING: An analytical cross-sectional study employing exploratory survey methods was conducted in the city of Alcobaça in the state of Bahia, Brazil METHODS: The study included 473 older adults who answered a structured questionnaire during an interview. Exposure time to SB and PA level were assessed using the International Physical Activity Questionnaire, and depressive symptoms were analyzed using the short version of the Geriatric Depression Scale. An isotemporal replacement model was used to evaluate the effects of different SB sessions on depressive symptomatology. RESULTS: An increase in the risk of depressive symptoms was observed when MVPA and sleep time were substituted for the same SB time at all times tested, with maximum values of 40% and 20%, respectively. Opposite substitution of MVPA and sleep time increments reduced the risk of depressive symptomatology by 28% and 17%, respectively. CONCLUSIONS: The results of the present study indicate that replacing SB with the same amount of sleep or MVPA may reduce depressive symptoms. The longer the reallocation time, the greater are the benefits.
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ABSTRACT BACKGROUND: Frailty syndrome is associated with various physical, cognitive, social, economic, and environmental factors. Although frailty syndrome occurs progressively with age, prevention and treatment are possible. Reducing or eliminating risks and increasing protective factors may be potential strategies for reducing the prevalence of injuries related to frailty. One of the most effective actions is to decrease the time spent in sedentary behavior (SB) by increasing regular physical activity (PA). OBJECTIVE: To examine the hypothetical effect of substitution of the time spent in sleep or SB with an equivalent time spent performing moderate or vigorous PA on frailty syndrome in the older population. DESIGN AND SETTING: An analytical cross-sectional study conducted using exploratory methods of survey, carried out in Alcobaça city, Bahia, Brazil. METHODS: A total of 456 older adults of both sexes, aged ≥ 60 years, participated in this study. Frailty syndrome was identified according to the criteria of the Study of Osteoporotic Fractures. PA and SB were assessed using the International Physical Activity Questionnaire, and sleep was assessed using the Pittsburgh Sleep Quality Index. The effects of time substitution on these behaviors were verified using Poisson regression. RESULTS: The replacement of 60 min/day of SB (prevalence ratio, PR = 0.52; 95% confidence interval, CI: 0.28-0.96) or sleep (PR = 0.52; 95% CI: 0.27-0.98) with 60 min/day of moderate PA (MPA) was associated with a 48% reduction in the prevalence of frailty syndrome. CONCLUSIONS: Replacing the time spent sitting or sleeping with the same amount of MPA time may reduce frailty; the longer the duration of time spent in the substitution of sleep or SB with MPA, the greater the benefits.
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ABSTRACT BACKGROUND: Dynapenia is characterized by mobility limitations in the older population when combined with aggravating behavioral factors that can increase the risk of morbidity and mortality. OBJECTIVE: To investigate the hypothetical effects of reallocation of time spent on sedentary behavior (SB), moderate-to-vigorous physical activity (MVPA), and sleep on dynapenia in older adults. DESIGN AND SETTING: A prospective cohort study using exploratory surveys in Alcobaça City, Bahia State, Brazil. METHODS: In total, 176 older adults (≥ 60 years) of both sexes participated in this study. Dynapenia was assessed using the handgrip strength test with cutoff points of < 27 kg for men and < 16 kg for women. MVPA and SB were assessed using the International Physical Activity Questionnaire, and sleep was assessed using the Pittsburgh Sleep Quality Index. RESULTS: Effects on reallocation were found for the shortest times, such as 10 minutes (odds ratio (OR) 0.92; 95% confidence interval (CI): 0.85-0.99); substituting MVPA with SB increased the chances of dynapenia by 58.0% (95% CI: 1.01-2.49). Analyzing the substitution of 60 minutes/day of SB with 60 minutes/day of MVPA revealed a protective effect, with a lower OR for dynapenia of 37.0% (OR 0.63; 95% CI: 0.40-0.99). The reallocation of sleep time did not significantly reduce dynapenia. CONCLUSIONS: Substituting the time spent sitting with the same amount of time spent on MVPA can reduce dynapenia, and a longer reallocation time confers greater health benefits in older adults.
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ABSTRACT This research aimed to analyze the association of physical activity (PA) level combined with exposure to sedentary behavior (SB) with dynapenia in older people. Epidemiological, cross-sectional study, conducted with 208 older adults in Aiquara, Bahia, Brazil. Habitual PA and SB were quantified using the International Physical Activity Questionnaire. Based on this information, participants were divided into groups (G): G1) sufficiently active and low SB; G2) sufficiently active and high SB; G3) insufficiently active and low SB; and G4) insufficiently active and high SB. Assessment of dynapenia was performed based on the values of the handgrip strength measured in kilogram-force (kgf) (women: 18.37 kgf; men: 26.75 kgf). Descriptive analysis was conducted using absolute and relative frequencies, mean and standard deviation. For the inferential analysis, Poisson regression was used, with a robust estimator, calculation of Prevalence Ratios (PRs) and their relevant Confidence Intervals (CIs) of 95.0%. It was observed that the mean age of women and men were, respectively, 71.0 ± 6.7 and 72.3 ± 8.1 years and the prevalence of dynapenia observed was about 24.5%. Furthermore, it was found that the insufficiently active older adults with low SB (G3) (PR: 2.28; 95%CI: 1.09-4.76), and those insufficiently active with high SB (G4) (PR: 4, 14; 95%CI: 1.95-8.70), were more likely to experience the assessed outcome. Evidence showed that, among the older adults in Aiquara the prevalence of dynapenia was high in the presence of an insufficient level of PA, especially when combined with greater exposure to SB
RESUMO Esta pesquisa teve como objetivo analisar a associação do nível de atividade física (AF) combinado à exposição ao comportamento sedentário (CS) com a dinapenia em idosos. Estudo epidemiológico, transversal, conduzido com 208 idosos de Aiquara, Bahia, Brasil. A AF habitual e o CS foram quantificados pelo International Physical Activity Questionnaire. A partir destas informações, dividiu-se os participantes em grupos (G): G1) suficientemente ativos e baixo CS; G2) suficientemente ativos e elevado CS; G3) insuficientemente ativos e baixo CS; e G4) insuficientemente ativos e elevado CS. A avaliação da dinapenia foi realizada a partir dos valores, em quilograma-força (kgf), da força de preensão manual (mulheres: 18,37 kgf; homens: 26,75 kgf). A análise descritiva foi conduzida por meio de frequências absolutas e relativas, média e desvio padrão. Para a análise inferencial utilizou-se a regressão de Poisson, com estimador robusto, cálculo das Razões de Prevalência (RP) e de seus respectivos Intervalos de Confiança (IC) de 95,0%. Observou-se que as médias de idade das mulheres e dos homens, foram, respectivamente, 71,0 ± 6,7 e 72,3 ± 8,1 anos e a prevalência de dinapenia observada foi na ordem de 24,5%. Ademais, averiguou-se que os idosos insuficientemente ativos com baixo CS (G3) (RP: 2,28; IC95%: 1,09-4,76), e os insuficientemente ativos com elevado CS (G4) (RP: 4,14; IC95%: 1,95-8,70), apresentaram maior probabilidade ao desfecho analisado. As evidências verificadas mostraram que, entre os idosos de Aiquara, a prevalência de dinapenia foi elevada na presença do nível de AF insuficiente, especialmente quando combinado a uma maior exposição ao CS.
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O objetivo do estudo foi investigar se a exposição a informações sobre vida saudável, via aplicativo de mensagem de smartphone ou folder impresso, reduz o comportamento sedentário (CS) de universitários. Este estudo é um piloto prospectivo quase experimental, constituído por 69 participantes, randomizados por turma, em dois grupos de intervenção via mensagem de texto Whatsapp (grupo MSG)e folder impresso (grupo FOLDER). As intervenções apresentaram orientações semelhantes com foco geral de promover um perfil de vida saudável, reduzindo o CS. As mensagens foram encaminhadas às segundas-feiras por um período de quatro semanas consecutivas. O tempo exposto ao CS foi avaliado a partir do Questionário Internacional de Atividade Física na Baseline e após quatro semanas de intervenção. Para avaliar o efeito do tempo, da intervenção e a interação (tempo*intervenção) no CS, foram utilizados modelos mistos generalizados para medidas repetidas, utilizando uma matriz de covariância autorregressiva de primeira ordem (AR1) e foi utilizado o teste post hoc de Bonferroni. Foi adotado o nível de significância de 5%. Foram observados efeitos significantes das intervenções (F = 5,30; p = 0,024), FOLDER (519,71 ± 28,01) e MSG (430,37 ± 26,82), e dos tempos (F = 19,05; p < 0,001) baseline (522,07 ± 22,18) e após 4 semanas (428,00 ± 22,18) mas não foi observado interação entre o tempo e a intervenção (F = 0,430; p = 0,514). Foram observadas diferenças significantes entre os grupos no momento pós intervenção (p = 0,022). Ambas as intervenções parecem ser úteis para a redução do tempo exposto ao CS em uma população de adultos jovens durante o período de quatro semanas
The objective of the study was investigate whether exposure to information about healthy living, via smart-phone message application or printed folder, reduces the sedentary behavior (SB) of university students. This study is an almost experimental prospective pilot, consisting of 69 participants, randomized by class, in two intervention groups via Whatsapp text message (MSG group) and printed folder (FOLDER group). The interventions presented similar guidelines with a general focus on promoting a healthy life profile, reducing SB. The messages were forwarded on Mondays for a period of four consecutive weeks. The time exposed to the SB was evaluated using the International Physical Activity Questionnaire on the baseline and after four weeks of intervention. To evaluate the effect of time, intervention and interaction (time * intervention) in the SB, generalized mixed models for repeated measures were used, using a first order autoregressive covariance matrix (AR1) and Bonferroni post hoc test was used. The significance level of 5% was adopted. Significant effects of the interventions (F = 5.30; p = 0.024), FOLDER (519.71 ± 28.01) and MSG (430.37 ± 26.82), and of the times (F = 19.05; p < 0.001) baseline (522.07 ± 22.18) and after 4 weeks (428.00 ± 22.18) but no interaction was observed between time and intervention (F = 0.430; p = 0.514). Significant differences were observed between the groups at the time after the intervention (p = 0.022). Both interventions appear to useful for reducing the time exposed to SC in a population of young adults over the four-week period
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Humans , Male , Female , Technology , Health , Sedentary BehaviorABSTRACT
ABSTRACT OBJECTIVE To examine the effects of physical activity (PA) and sedentary behaviour (SB), in isolation and combination, on all-cause mortality in older adults. METHODS Prospective, population-based cohort study. The data were collected from first wave in 2015 and the follow-up continued until 2020. The sample consisted of 332 older adult people aged ≥ 60 years-old, out of which 59 died. The level of PA and SB was assessed by the International Physical Activity Questionnaire (IPAQ). The older adults were divided into PA categorized as sufficiently active and insufficiently active and into high and low SB. We built four combinations of PA and SB. Also, we used the Cox proportional hazards regression with a 95% confidence interval with hazard ratio estimate so as to verify the mortality risks between PA, SB, and the combinations of PA and SB. RESULTS Insufficiently active individuals had higher risks of mortality compared to sufficiently active people. We observed no associations between SB and mortality separately; however, when evaluated in a combined way, insufficiently active individuals and with a high SB time had a higher chance of mortality compared to active individuals with a low SB time. CONCLUSION Our isolated analyses demonstrate that complying with PA recommendations reduces the risk of mortality; however, no association was found between the time of PA exposure with the time of SB. When analysing the combination, being physically inactive and with a long time of SB showed higher mortality rates, with SB being an enhancer of this risk. The results of this study show the interdependence of SB for PA performed at moderate to vigorous intensity. The understanding of this interrelation must be considered in the formulation of public health guidelines.