کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2708604 1144910 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Intra-individual variation in children's physical activity patterns: Implications for measurement
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Intra-individual variation in children's physical activity patterns: Implications for measurement
چکیده انگلیسی

Children's physical activity (PA) patterns change from day to day. This intra-individual variability affects precision when measuring key physical activity and sedentary behaviour variables. This paper discusses strategies used to reduce the random error associated with intra-individual variability and demonstrates the implications for assessing PA when varying number of days are sampled. Self-reported data collected on two hundred and ninety eight 13–14-year-olds were used to compare estimates of PA and sedentary behaviour derived from between 1 and 7 days of recall data. Large intra-individual coefficients of variation were calculated for physical activity level (14.5%), moderate-to-vigorous physical activity (83.4%), screen time (60.8%) and sleep (12.2%). While the magnitude of error associated with estimating means decreased as more days were sampled, the paper notes that depending on the nature of the research question being asked, sampling fewer days may yield sufficiently precise estimates. Therefore, researchers should conduct power analyses based on estimated inter- and intra-individual variability and sample size to determine how many days to sample when assessing children's PA patterns.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Science and Medicine in Sport - Volume 12, Issue 5, September 2009, Pages 568–572
نویسندگان
, , , , ,