title: Middle school physical education physical activity quantification: a pedometer steps/min guideline.
abstract: The objective of the study was to improve physical activity (PA) surveillance of the Healthy People 2010 Objective 22:10 (i.e., 50% of the lesson time engaged in PA) by establishing a pedometer steps/min guideline to quantify time engaged in PA during physical education. A sample of 180 middle school students had their PA measured via pedometry (steps/min) and behavioral observation (PA time). Factorial analyses of variance were used to examine PA differences. Linear and logistic regression, decision accuracy, and receiver-operating-characteristic (ROC) statistics were used to test steps/min cut points against the 50% PA recommendation. PA differences were not found (p > .01). Steps/min was a significant (p < or = .01) predictor of PA time, and the binary outcome of meeting or not meeting the PA recommendation. A steps/min interval of 82-88 was an accurate indicator of the 50% PA recommendation. The ROC statistic was .97 (p < or = .01), suggesting steps/min was an excellent discriminator of the binary outcome. Pedometer steps/min is a valid, objective, and practical approach for surveillance of physical education PA, a key physical education and public health outcome.
authors.affiliation: Kinesiology Department, The University of Wisconsin-Madison, 53706, USA. pwscruggs@education.wisc.edu
authors.forename: Philip W
authors.initials: PW
authors.lastname: Scruggs
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D015438:Health Behavior; D006293:Health Promotion; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D008297:Male; D009043:Motor Activity; D010806:Physical Education and Training; D010865:Pilot Projects; D011159:Population Surveillance; D011634:Public Health; D012574:Schools; D013334:Students; D016138:Walking / Q000502:physiology*