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 ...
Background The aim of this study was to examine the differences in diet, physical activity, and weight status among children living in rural and urban America and to study the roles of obesity-related behaviors in residence-based differences in childhood obesity. Methods We performed cross-sectional analysis of the 1999-2006 National Health ...
Background Leptin may influence moderate to vigorous physical activity (MVPA) at the start of puberty. The direction and magnitude of this association are unclear. Objectives To determine the effect of baseline leptin on MVPA over 1 year in minority girls at high risk for obesity. Methods Data came from TRANSITIONS, a ...
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 To examine relationships between physical activity (PA) and awareness and treatment status of low bone mineral density (BMD) among adults. Design Cross-sectional. Setting Stratified sample of adults living independently in the community. Subjects A total of 1928 adults aged 50 years and older who participated in the National Health and Nutrition ...
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 ...
Investigations using wearable monitors have begun to examine how sedentary time behaviors influence health. Purpose The objective of this study is to demonstrate the use of a measure of sedentary behavior and to validate the activPAL (PAL Technologies Ltd., Glasgow, Scotland) and ActiGraph GT3X (Actigraph, Pensacola, FL) for estimating ...
Introduction Data on physical activity levels of adolescents are mostly derived from self-reported instruments, and the vast majority of studies using objective measures are from high-income countries. The aim of this study was to describe the patterns of objectively measured physical activity in Brazilian adolescents. Methods In 2004–2005 (mean age of 13.3 ...