Purpose To examine characteristics of accelerometer-assessed sedentary behavior among older women. Methods An ancillary study to the Women’s Health Study is collecting 7 days of accelerometer-assessed (Actigraph GT3X+) physical activity and sedentary behavior data in ~15,000 women. This analysis includes data from the first 5,032 (mean age, 70.1 yr) women with ≥4 days ...
Optimal sleep duration (7-8h), moderate-to-vigorous intensity physical activity (MVPA) and light-intensity activity are beneficially associated with cardiometabolic outcomes and related biomarkers, while sedentary time and long (≥9h) or short (<7h) sleep duration are detrimentally associated. Purpose This study examined whether sleep duration modified the relationship between both sedentary/...
The ActiGraphTM is the most commonly used research grade physical activity monitor. However, the effect of the ‘low-frequency extension’ (LFE) on step counts in a free-living environment has not been widely studied. Purpose We sought to determine the accuracy of the ActiGraph’s LFE during freeliving activities in two versions ...
Accelerometers-based activity monitors are commonly used to measure physical activity energy expenditure (PAEE). Newly designed wrist and hip-worn triaxial accelerometers claim to accurately predict PAEE across a wide range of activities. Purpose To determine if the Nike FuelBand (NFB), Fitbit (FB) and ActiGraph GT3X+ (AG) accurately estimate PAEE in ...
Assessing physical activity (PA) with wearable sensors in epidemiologic studies often requires initializing activity monitors at the study site and mailing them to participants. In these studies, it is important to discern true PA data from mail transit data. Typically, participants are asked to log the date and time they ...
The importance of regular physical activity for maintaining optimal health is well documented. Accelerometer-based measures of activity have proven very useful in recent years for quantifying activity behavior in a wide variety of populations, including adults aged > 65 years. However, few studies have focused specifically on activity patterns within a 24-hour ...
Purpose To describe the physical activity levels and sedentary behavior of toddlers from Ventura County, California Methods Physical activity and sedentary behavior was measured in twenty three- (10 boys, 13 girls) toddlers (n= 22 toddlers, mean age 1.65 ± 0.49) using the Actigraph GT1M (Pensacola, Florida). GT1m’s were worn for a minimum of 6 ...
Sedentary behaviour (SB), which is characterized by the absence or low physical movement (e.g. sitting or watching TV) and by low energy expenditure (≤1.5 METs), has been associated with detrimental health effects, such as body fatness. Purpose To examine the bi-directional associations between objective measures of SB and moderate-to-vigorous physical ...
Physical activity can benefit the health of youth with Type 1 diabetes. Despite the benefits some studies have found patients do not always meet the physical activity recommendation of 60 minutes of moderate-to-vigorous physical activity (MVPA) per day. Physical activity and sedentary behaviour have not been measured previously in Scottish youth with ...
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 ...