Objectives: To examine the validity and reliability of the Fitbit Flex against direct observation for measuring steps in the laboratory and against the Actigraph for step counts in free-living conditions and for moderate-to-vigorous physical activity (MVPA) and activity energy expenditure (AEE) overall.
Methods: Twenty-five adults (12 females, 13 males) wore a Fitbit ...
Background: Increasing physical activity (PA) during the school day and out-of-school time are critical strategies for preventing childhood obesity and improving overall health. The purpose of the present investigation was to examine schoolchildren’s volume and type of PA during school-time and out-of-school, compared to national recommendations and differences by ...
Background: To combat the disproportionately higher risk of childhood obesity in Latino preschool-aged children, multilevel interventions targeting physical (in) activity are needed. These require the identification of environmental and psychosocial determinants of physical (in) activity for this ethnic group. The objectives were to examine differences in objectively-measured physical activity and ...
Background: Accelerometry is the method of choice for objectively assessing physical activity in older adults. Many studies have used an accelerometer count cut point corresponding to 3 metabolic equivalents (METs ) derived in young adults during treadmill walking and running with a resting metabolic rate (RMR) assumed at 3.5 mL · kg−1·min−1(corresponding ...
Purpose: This study evaluated the relative validity of different consumer and research activity monitors during semistructured periods of sedentary activity, aerobic exercise, and resistance exercise.
Method: Fifty-two (28 male and 24 female) participants age 18-65 yr performed 20 min of self-selected sedentary activity, 25 min of aerobic exercise, and 25 min of resistance exercise, with 5 ...
Introduction: Many children fail to meet international guideline recommendations for health-related activity (≥60 minutes/day of moderate-to-vigorous physical activity [MVPA]), and intervention studies to date have reported negligible effects.
Objective: Explore the associations of organized leisure-time sport participation with overall physical activity levels and health-related physical activity guideline concordance.
Methods: This ...
The purpose of this study was to provide further insight into the limited amount of data that exists on both the dietary practices and energy expenditure of adolescent academy-level football players. Ten male adolescent football players, representing a professional club at academy level (mean ± SD: 15.4 ± 0.3 years; height 1.7 ± 0.1m; weight 57.8 ± 7.8kg ...
Purpose: Grounded in self-determination theory (Deci and Ryan, 2000) and achievement goal theory (Ames, 1992, Nicholls, 1989) this study tested a hypothesised model linking perceptions of the coach-created motivational climate within youth sport (i.e., empowering and disempowering dimensions; Duda, 2013), to motivation regulations and objectively measured daily moderate-to-vigorous physical activity (MVPA) and sedentary ...
Background: Observational studies have shown that individuals can be both highly sedentary and highly active, and active people sit as much as those who do not meet the physical activity guidelines. It is not known how sedentary behavior changes in response to significant exercise training, such as training for ...
Background: Participation in moderate physical activity (PA) as a means of eliciting health-related benefits is consistently recommended through the 2008 Physical Activity Guidelines and the ACSM-AHA Physical Activity Recommendations. Many try to meet this requirement by participating in PA that fit both their functional abilities and personality. However, quantifying the intensity ...