Conclusions The current evidence , from cross-sectional and prospect i ve cohort studies , supports that physical activity of any bout duration is associated with improved health outcomes , which includes all-cause mortality .
Purpose This study aim ed to conduct a systematic literature review to determine whether physical activity episodes of < 10 min in duration have health-related benefits or , alternatively , if the benefits are only realized when the duration of physical activity episodes is ≥10 min .
Associations Between Physical Activity and BMI, Body Fatness, and Visceral Adiposity in Overweight or Obese Latino and Non-Latino Adults
Background / objectives : Although several studies have reported associations between moderate to vigorous physical activity ( MVPA ) , body fatness and visceral adipose tissue ( VAT ) , the extent to which associations differ among Latinos and non-Latinos remains unclear . This study evaluated the associations between body composition and MVPA in Latino and non-Latino adults . Subjects/ methods : An exploratory , cross-sectional analysis was conducted using baseline data collected from 298 overweight adults enrolled in a 12-month r and omized controlled trial that tested the efficacy of text messaging  to improve  weight loss . MVPA , body fatness and VAT were assessed by waist-worn accelerometry , dual-energy x-ray absorptiometry ( DXA ) , and DXA-derived software ( GE CoreScan GE , Madison , WI , USA ) , respectively . Participants with < 5 days of accelerometry data or missing DXA data were excluded ; 236 participants had complete data . Multivariable linear regression assessed associations between body composition and MVPA per day , defined as time in MVPA , bouts of MVPA ( time per bout ⩾10 min ) , non-bouts of MVPA ( time per bout < 10 min ) and meeting the 150-min MVPA guideline . The modifying influence of ethnicity was modeled with a multiplicative interaction term . Results : The interaction between ethnicity and MVPA in predicting percent body fat was significant ( P=0.01 , 95 % confidence interval ( CI ) ( 0.58 , 4.43 ) ) such that a given increase in MVPA was associated with a greater decline in total body fat in non-Latinos compared with Latinos ( adjusted for age , sex and accelerometer wear time ) . There was no interaction between ethnicity and MVPA in predicting VAT ( g ) ( P=0.78 , 95 % CI ( −205.74 , 273.17 ) ) and body mass index ( BMI ) ( P=0.18 , 95 % CI ( −0.49 , 2.26 ) ) . Conclusions : An increase in MVPA was associated with a larger decrease in body fat , but neither BMI nor VAT , in non-Latinos compared with Latinos . This suggests that changes in VAT and BMI in response to MVPA may be less influenced by ethnicity than is total body fatness
Conclusions The current evidence , from cross-sectional and prospect i ve cohort studies , supports that physical activity of any bout duration is associated with improved health outcomes , which includes all-cause mortality .
Purpose This study aim ed to conduct a systematic literature review to determine whether physical activity episodes of < 10 min in duration have health-related benefits or , alternatively , if the benefits are only realized when the duration of physical activity episodes is ≥10 min .