Are youth BMI and physical activity associated with better or worse than expected health-related quality of life in adulthood? The Physical Activity Longitudinal Study.

School of Kinesiology & Health Studies, Queen's University, Kingston, ON, K7L 3N6, Canada, 5ch3@queensu.ca.

PURPOSE: Body mass index (BMI) and physical activity (PA) affect health-related quality of life (HRQL); however, the long-term impact of youth BMI and PA on adult HRQL is unknown. We investigated the relationship of youth BMI and PA to adult HRQL 22 years later. METHODS: Subjects included 310 participants aged 7 to 18 in the 1981 Canada Fitness Survey, followed up in 2002-2004. The associations of youth BMI and leisure time PA to adult HRQL were examined, comparing to age- and sex-adjusted Canadian SF-36 norms. RESULTS: Bivariate analyses revealed positive associations between youth overweight and mental aspects of adult HRQL, but little association with physical aspects. In logistic regression adjusting for adult BMI and other covariates, overweight youth were 7 times more likely than healthy weight youth to score at/above the norm on both mental health (MH) and bodily pain, and almost 18 times more likely on the mental component score (MCS). Youth BMI was also positively associated with general health (GH), social functioning, and role emotional. Removing adult BMI from the models led to attenuated associations with mental HRQL and no association with GH. Longitudinal BMI status change was explored, and findings supported the main regression results. Youth PA was not associated with adult HRQL. CONCLUSIONS: Youth overweight conveyed a long-term positive impact on several aspects of adult HRQL, and this impact may be both direct and indirect through BMI change and the effect on adult BMI. Youth PA had no long-term impact on adult HRQL.

Atividade física vigorosa é que resolve

Diversos estudos têm mostrado a relevância da atividade física vigorosa. Neste, abaixo, conduzido recentemente com japoneses registra um avanço: fazer muita ou fazer pouca atividade?
Aparentemente, ambas as situações resolvem, mas a segunda resolve mais do que a primeira...

Diabetes Res Clin Pract. 2010 Jan 12. [Epub ahead of print]

The effects of vigorous physical activity on intra-abdominal fat levels: A preliminary study of middle-aged Japanese men.

Sasai H, Katayama Y, Nakata Y, Eto M, Tsujimoto T, Ohkubo H, Tanaka K.

Doctoral Program in Sports Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan; Japan Society for the Promotion of Science, Tokyo, Japan.

AIM: To examine the effects of vigorous physical activity (PA) on intra-abdominal fat (IF) levels in obese men. METHODS: Thirty-seven obese men (mean age: 47.6+/-8.6 years) engaged in a 12-week aerobic exercise program on a regular basis (3 days/week). We divided them into low volume of vigorous PA group (n=19) or high volume of vigorous PA group (n=18), based on the median time spent (34.3min/week) in vigorous PA (over 6.1 metabolic equivalents assessed by a single-axis accelerometer) throughout the program. RESULTS: Regular exercise reduced IF levels (measured by computed tomography) from 188.1+/-53.9cm(2) to 170.3+/-46.6cm(2) for the low volume of vigorous PA group and from 167.9+/-44.3cm(2) to 137.9+/-40.6cm(2) for the high volume of vigorous PA group. Two-way (timexgroup) ANOVA revealed no significant interactions for the IF level. However, correlation analysis for all participants showed that time spent in vigorous PA throughout the program significantly correlated to IF reductions after adjusting for initial levels of IF, vigorous PA and weight changes (r=-0.42, P=0.02). CONCLUSION: This study suggests that vigorous PA may affect IF reductions in obese men.