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Latest Clinical Research Published by ACSM.

Sports Contribute to Total Moderate-to-Vigorous Physical Activity in School Children Physical inactivity among children and adolescents is a major concern. It has been estimated that only a third of children and adolescents achieve theWorld Health Organization's recommendation of 60 min of moderate to vigorous physical activity (MVPA) a day. This descriptive study from Germany measured the physical activity (PA) levels of children (ages 6 to 10 years) and adolescents (ages 11 to 17 years), along with participation in physical education (PE) classes and organized youth sports (OYS) over 2-wk periods. The purpose of this study, published in the August 2019 issue of Medicine & Science in Sports & Exercise® (MSSE), was to evaluate the contribution of PE and OYS to the total PA of children and adolescents, and correlate participation in these activities to the achievement of the WHO recommendation of at least 60 min·d of MVPA (1). Children and adolescents from public school classes were recruited to participate in the study. Subjects wore accelerometers on their right hip during waking hours (except for showering, bathing, and swimming) for 7 d in the winter of 2013 to 2014 and again in the spring of 2014. Step counts were categorized as follows: sedentary behavior (SB) 25 counts/15 s, low physical activity (LPA) 26 to 573 counts/15 s, and MVPA 574 counts/15 s. Paper-based diaries were used to record when the accelerometers were put on and removed, as well as when the subject was participating in PE or OYS. Analysis was done on data obtained from 396 children with valid accelerometer data of 600 min·d. The average age of the children was 8.5 years and the adolescents was 13.6 years. Children spent on average 50min·d more in LPA and 20 min·d more in MVPA, and approximately 2 h·d less in SB, than adolescents. Approximately 74% of children, but only 37% of adolescents, achieved the WHO recommendation of averaging at least 60min ofMVPA per day. Children engaged in OYS on 33% of the days, while adolescents participated inOYS on 24%of the days. Both age