Background: Physical activity (PA) is suggested to contribute to fat loss not only through increasing energy expenditure “per se” but also increasing muscle mass; therefore, it would be interesting to better understand the specific associations of PA with the different body’s components such as fat mass and muscle mass. ...
Purpose: The purpose of this study was to develop and validate two novel machine-learning methods (soj-1x and soj-3x) in a free-living setting. Methods: Participants were directly observed in their natural environment for ten consecutive hours on three separate occasions. PA and SB estimated from soj-1x, soj-3x ...
Sedentary occupational behavior may contribute to positive energy balance and weight gain. Strategies to reduce excessive sedentary behavior and increase workplace ambulatory activity are needed. Purpose To investigate the initial effects of treadmill workstation adoption on work-related ambulatory activity and sedentary time in overweight/obese office workers. Methods Volunteers (n=17; ...
Purpose: Studies estimating the contribution of physical activity (PA) to the development of body mass index (BMI) in critical periods of childhood are warranted. Therefore, we have prospectively investigated this relationship in boys and girls of the KOALA Birth Cohort study, the Netherlands, in the period around adiposity rebound (i....
Results from several objective monitoring studies suggest that children’s physical activity (PA) patterns may change across seasons; however, it is not well understood how PA patterns in the childcare setting may change across seasons. Purpose To prospectively track preschoolers’ PA patterns during childcare while investigating for seasonal differences in ...
Background: There is little consensus on how many hours of accelerometer wear time is needed to reflect a usual day. This study identifies the bias in daily physical activity (PA) estimates caused by accelerometer wear time. Methods: 124 adults (age = 41 ± 11 years; BMI = 27 ± 7 kg/m-2) contributed approximately 1,200 days accelerometer wear time. Five 40 ...
Background: Increases in physical activity (PA) are promoted by walking in an outdoor environment. Along with walking speed, slope is a major determinant of exercise intensity, and energy expenditure. The hypothesis was that in free-living conditions, a hilly environment diminishes PA to a greater extent in obese (OB) when compared ...
Large scale studies investigating physical activity level in the young population often include children and adolescents in the age range 9 to 15 years. However, less is known about the physical activity level of 6-year-olds. Active commuting, such as walking or cycling to school, has been promoted as a potential source of ...
Purpose The purpose of this study was to measure and compare physical activity (PA) intensity performed during 10 weeks of U.S. Army Basic Combat Training (BCT) at two training sites (Ft Jackson, SC; Ft Sill, OK). Methods 264 recruits from 11 companies wore an ActiGraph on their waist during waking hours for ...
The Physical Activity Questionnaires (PAQ-Children and PAQ-Adolescents) are widely used to assess youth physical activity patterns but a limitation is that they do not provide information about time spent in moderate-to-vigorous physical activity (MVPA). Purpose The purpose of this study was to calibrate in- and out-of-school activity items of the ...