Aim To investigate eight-year changes in fatness, fitness and physical activity in a cohort of Icelandic children by comparing measurements conducted at two different time points. Methods In 2003 a total of 489, 9-year-olds participated in a study called Lifestyle of 9 and 15 year-old Icelanders. A total of 258 from this cohort were recruited ...
This pilot study examined the effects of a teacher-taught, locomotor skill (LMS)-based physical activity (PA) program on the LMS and PA levels of minority preschooler-aged children. Eight low-socioeconomic status preschool classrooms were randomized into LMS-PA (LMS-oriented lesson plans) or control group (supervised free playtime). Interventions were delivered for 30 min/...
Purpose The objective of this study is to assess the performance of existing wear/nonwear time classification algorithms for accelerometry data collected in the free-living environment using a wrist-worn triaxial accelerometer and a waist-worn uniaxial accelerometer in older adults. Methods Twenty-nine adults age 76 to 96 yr wore wrist accelerometers for approximately 24 ...
Purpose This study was conducted to determine if physical activity volume (PAv) and intensity (PAi) at baseline influence the likelihood of gaining hip bone mineral density (BMD) over 6 years. Design and Sample In a prospective study, the sample was limited to 244 female nonsmokers, ages 35 to 45 years, and was approximately 90% white. ...
Purpose Physical activity in youth decreases with age, with the transition from primary to secondary school being a key period for change. Active travel to school has been associated with higher physical activity in youth compared with those who travel by car. This study investigated whether change in travel mode ...
Previous studies have demonstrated that pattern recognition approaches to accelerometer data reduction are feasible and moderately accurate in classifying activity type in children. Whether pattern recognition techniques can be used to provide valid estimates of physical activity (PA) energy expenditure in youth remains unexplored in the research literature. Purpose The ...
Purpose It is a commonly held perception that most young children are naturally active and meet physical activity recommendations. However, there is no scientific evidence available on which to confirm or refute such perceptions. The purpose of this study was to describe the physical activity levels and patterns of Australian ...
Abstract Accurate and reliable methods for assessing human physical activity (PA) energy expenditure (PAEE) are informative and essential for understanding individual behaviors and quantifying the effect of PA on disease, for PA surveillance, and for examining determinants of PA in different populations. This article reviews recent advances in the estimation ...
Purpose This study examines what volume of accelerometry data (h·d-1) is required to reliably estimate preschool children's physical activity and whether it is necessary to include weekday and weekend data. Methods Accelerometry data from 493 to 799 (depending on wear time) preschool children from the Melbourne-based Healthy Active Preschool Years study ...
Abstract Prior to 2008, data collection from Actigraph accelerometers was only possible in the uniaxial mode. In 2009, Actigraph released the GT3X, which allows triaxial data collection. The purpose of this study was to determine if data collected by the GT3X in the uniaxial mode are comparable to its predecessor, ...