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      Girls' activity levels and lesson contexts in middle school PE: TAAG baseline.

      Medicine and Science in Sports and Exercise
      Adolescent, Exercise, Faculty, Female, Humans, Observation, Physical Education and Training, organization & administration, Professional Role, Schools, United States

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          Abstract

          To assess girls' physical activity (PA) in middle school physical education (PE) as it relates to field site, lesson context and location, teacher gender, and class composition. We observed girls' PA levels, lesson contexts, and activity promotion by teachers in 431 lessons in 36 schools from six field sites participating in the Trial of Activity for Adolescent Girls. Interobserver reliabilities exceeded 90% for all three categories. Data were analyzed using mixed-model ANOVA with controls for clustering effects by field site and school. Mean lesson length was 37.3 (+/-9.4) min. Time (13.9+/-7.0 min) and proportion of lessons (37.9+/-18.5%) spent in moderate to vigorous PA (MVPA), and time (4.8+/-4.2 min) and proportion of lessons (13.1+/-11.7%) in vigorous PA (VPA) differed by field site (P<0.004). Lesson time for instructional contexts differed by field site, with overall proportions as follows: game play (27.3%), management (26.1%), fitness activities (19.7%), skill drills (12.1%), knowledge (10.6%), and free play (4.4%). Coed classes were 7.9 min longer than girls-only classes (P=0.03). Although 27 s shorter, outdoor lessons were more intense (MVPA%=45.7 vs 33.7% of lesson, P<0.001) and provided 4.0 more MVPA minutes (P<0.001). MVPA, VPA, and lesson contexts did not differ by teacher gender. There was little direct promotion of PA by teachers during lessons. Substantial variation in the conduct of PE exists. Proportion of lesson time girls spent accruing MVPA (i.e., 37.9%) fell short of the Healthy People 2010 objective of 50%. Numerous possibilities exist for improving girls' PA in PE.

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          Author and article information

          Journal
          16826019
          2431981
          10.1249/01.mss.0000227307.34149.f3

          Chemistry
          Adolescent,Exercise,Faculty,Female,Humans,Observation,Physical Education and Training,organization & administration,Professional Role,Schools,United States

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