Moderate to vigorous physical activity and weight outcomes: does every minute count?

American journal of health promotion : AJHP

PubMedID: 23458375

Fan JX, Brown BB, Hanson H, Kowaleski-Jones L, Smith KR, Zick CD. Moderate to vigorous physical activity and weight outcomes: does every minute count?. Am J Health Promot. 2013;28(1):41-9.
Abstract Purpose. The purpose of this study was to test if moderate to vigorous physical activity (MVPA) in less than the recommended =10-minute bouts related to weight outcomes. Design. Secondary data analysis. Setting. Random sample from the U.S. civilian noninstitutionalized population included in the National Health and Nutrition Examination Survey (NHANES). Participants. A total of 4511 adults aged 18 to 64 years from the 2003-2006 NHANES. Method. Clinically measured body mass index (BMI) and overweight/obese status were regressed on accelerometer measures of minutes per day in higher-intensity long bouts (=10 minutes, =2020 accelerometer counts per minute [cpm]), higher-intensity short bouts (<10 minutes, =2020 cpm), lower-intensity long bouts (=10 minutes, 760-2019 cpm), and lower-intensity short bouts (<10 minutes, 760-2019 cpm). Socioeconomic and demographic characteristics were controlled. Results. Both higher-intensity short bouts and long bouts of PA related to lower BMI and risk of overweight/obesity. Neither lower-intensity short bouts nor long bouts related to BMI or risk of overweight/obesity. Conclusion. The current =10-minute MVPA bouts guideline was based on health benefits other than weight outcomes. Our findings showed that for weight gain prevention, accumulated higher-intensity PA bouts of <10 minutes are highly beneficial, supporting the public health promotion message that "every minute counts."