Combined Associations of Physical Activity and Sedentary Behavior With Depressive Symptoms in Older Adults.

The aim of this study was to analyze the association of combined physical activity (PA)/sedentary behaviour (SB) with depressive symptoms (DS) in older adults. A cross-sectional study was conducted with 622 individuals ≥ 60 years old. After adjusting for gender, years of study, and monthly household income, prevalence ratios for presence of DS were statistically significant for older adults with <150 min/week in PA and ≥75th percentile of SB on weekdays (PR = 2.11,95%CI: 1.54-2.90) and on weekends (PR = 2.20,95%CI:1.57-3.09). Older adults who do not meet the PA guidelines and spend more time in SB on weekdays or weekend days are more likely to present with DS compared to those who meet the recommendations of PA and spend less time in SB during the day.

A Cross-Sectional Study of the Relationship of Physical Activity with Depression and Cognitive Deficit in Older Adults.

The aim of this study was to examine the association of physical activity with depression and cognition deficit, separately and combined, in Brazilian older adults. We analyzed data from 622 older adults. Physical activity was assessed using the International Physical Activity Questionnaire. Depressive symptoms were assessed using the Geriatric Depression Scale, while cognitive deficit was assessed using the Mini-Mental State Examination. Multinomial logistic regressions were used to assess associations of depression and cognitive deficit with sociodemographic, health, and behavioral variables. Prevalence of physical inactivity (< 150 min of moderate-to-vigorous physical activity/ week), depression, and cognitive deficit were 35.7%, 37.4%, and 16.7%. Physical inactivity was associated with depression (OR: 1.83, 95% CI: 1.14-2.94) and with depression and cognitive deficit combined (OR: 4.23, 95% CI: 2.01-8.91). Physically inactive participants were also more likely to present limitations in orientation and language functions. Physical inactivity was associated with depression and also with depression and cognitive deficit combined in older adults.

Body mass index as discriminator of the lean mass deficit and excess body fat in institutionalized elderly people.

The objective of this study was to identify the discriminating criterion for body mass index (BMI) in the prediction of low fat free mass and high body fat percentage according to sex among older people. Observational analytical study with cross-sectional design was used for this study. All institutionalized older people from the city of Uberaba (Minas Gerais, Brazil) who fit within the inclusion and exclusion criteria were approached. Sixty-five institutionalized older people were evaluated after signing a Free and Informed Consent Form. Descriptive and inferential statistical procedures were employed for the analysis, using Student's t-test and multiple linear regression. Receiver Operating Characteristic (ROC) curves were constructed to determine the BMI (kg/m(2)) cut-off points. The study complied with all the ethical norms for research involving human beings. In comparing the anthropometric measurements obtained via bioimpedance, elder male had higher mean height and body water volume than females. However, women had higher mean triceps skinfold and fat free mass than men. The BMI cut-off points, as discriminators of low fat free mass percentage and high body fat percentage in women, were ≤22.4 kg/m(2) and >26.6 kg/m(2), respectively; while for men they were ≤19.2 kg/m(2) and >23.8 kg/m(2). The results of this study indicate the need for multicenter studies aimed at suggesting BMI cut-off points for institutionalized older people, taking into account specific sex characteristics.