This study tested the equivalence of concurrently collected measurements of physical activity in children ages 3-5 years from the System for Observing Play and Leisure Activity in Youth (SOPLAY) and accelerometers. Accelerometry-based physical activity measurements were collected from 109 preschool children across 18 sites, and SOPLAY was used to…

This study examined the concordance between accelerometry-measured and self-reported physical activity (PA) and sedentary time in adults with autism. Twenty-four participants wore an ActiGraph GT3X + accelerometer for seven consecutive days and completed the International Physical Activity Questionnaire-Short Form (IPAQ-SF) on the last day of…

To convert accelerometer-based devices onto the same scale, a platform called Monitor-Independent Movement Summary (MIMS) was created and used in national studies. Yet, its physical activity (PA) intensity cutoff scores have not been established, making it less useful. This study was to link MIMS with the ActiGraph Count, known as "the…

The purpose was to examine the effect of an intermittent teaching unit based on the use of an activity wristband combined with other behavior modification techniques on secondary students' weekly objectively-measured physical activity (PA). 176 secondary students (12-16 years) were cluster-randomly assigned into the activity wristband (AWG) and…

The quality of the preschool environment may affect preschooler's levels of physical activity and sedentary time. In this paper, we aimed to assess the quality of the preschool movement environment and associations between the movement environment and children's physical activity and sedentary time in Norwegian preschools. A sample of 71…

Physical activity (PA) estimates from the Fitbit Flex 2 were compared to those from the ActiGraph GT9X Link in 123 elementary school children. Steps and intensity-specific estimates of PA and 3-month PA change were calculated using two different ActiGraph cut-points (Evenson and Romanzini). Fitbit estimates were 35% higher for steps compared to…

This study aimed to determine the validity of the ActiGraph wGT3X-BT for step counts (SC) at five different body locations in laboratory settings. A total of 29 male adults participated in this study. The participants walked or ran for different speeds on the treadmill while wearing ActiGraph wGT3X-BT on their right wrist (RW), left wrist (LW),…

The average daily amount of physical activity (PA) expended by children in summer camp is unknown. The purpose of this study was to investigate the trends in PA and sedentary behavior in school-aged summer campers during an outdoor adventure summer camp. Participants were a convenience sample of school-aged children (N = 183; 102 males and 81…

This research evaluated the feasibility of actigraphy to measure sleep and physical activity in children (ages 2-8 years) with autism spectrum disorder (ASD). We also explored associations between sleep and physical activity. Validated screening measures established eligibility. Questionnaires, diaries, and 5 days and 5 nights of actigraphy…

The purpose of this study was to determine the associations of device-based assessments of physical activity (PA) and health-related fitness (HRF) with gross motor skills (GMS) in preschool-aged children. Participants were 3- to 5-year-old children (N = 316; 49.6% female) who participated in the 2012 National Youth Fitness Survey. GMS was assessed…

A universal approach to characterizing sport-related physical activity (PA) types in sport settings does not yet exist. Young adults (n = 30), 19-33 years, engaged in a 15-min activity session, performing warm-ups, 3-on-3 soccer, and 3-on-3 basketball. Videos were recorded and manually coded as criterion PA types (walking, running, jumping, rapid…

This study examines the convergent validity of the Physical Activity Questionnaire for Children (PAQ-C) for assessing moderate-to-vigorous and total physical activity (PA) in school children. 430 participants (51.6% girls) aged 9-12 years provided valid accelerometer data (wGT3X-BT) and completed the PAQ-C. Convergent validity was assessed using…

Free-living comparability of wGT3X-BT and GT9X ActiGraphs has not been verified. Participants (n = 34, 35% females, 7-17 y) wore hip-worn monitors for one week. Vector magnitude (VM; 15-s epoch), Mean Amplitude Deviation (MAD) and Euclidean Norm Minus One (ENMO) (5-s epoch), and percent of time spent in each activity intensity (using cut-points)…

Objective: To systematically review and synthesize all relevant literature to assess the range of average daily sedentary time (ST) of undergraduate students enrolled in university and college programs across the world. Methods: Published, peer-reviewed articles were included if they: (1) were in English; (2) had a study population that consisted…

Background: Physical activity is important for children's physical, mental and cognitive wellbeing, but many children are insufficiently active. Schools offer a promising setting in which to enable positive health behaviours and teachers can play an influential role in facilitating pupils' physical activity. The aim of this study was to use…