title: An objective assessment of children's physical activity during the Keep It Moving! after-school program.
abstract: BACKGROUND
  After-school programs may provide valuable opportunities for children to accumulate healthful physical activity (PA). This study assessed the PA of third-, fourth-, and fifth-grade children in the Keep It Moving! (KIM) after-school PA program, which was implemented in an ethnically diverse and low socioeconomic status school district in Colorado Springs, Colorado.
  
  
  METHODS
  The PA of KIM participating children (N = 116) at 4 elementary schools was objectively assessed using ActiGraph accelerometers and the System for Observing Fitness Instruction Time (SOFIT). Linear mixed-effects models or generalized linear mixed-effects models were used to compare time spent in sedentary (SED) behaviors, light PA (LPA), moderate PA (MPA), vigorous PA (VPA), and moderate-to-vigorous PA (MVPA) between genders and weight status classifications during KIM sessions.
  
  
  RESULTS
  Children accumulated 7.6 minutes of SED time, 26.9 minutes of LPA, and 22.2 minutes of MVPA during KIM sessions. Boys accumulated less SED time (p < .05) and LPA (p = .04) than girls, but accumulated more MPA (p = .04), VPA (p = .03), and MVPA (p = .03). Overweight/obese children accumulated more LPA (p = .04) and less VPA (p < .05) than nonoverweight children. SOFIT data indicated that children spent a considerable proportion of KIM sessions being very active (12.4%), walking (36.0%), or standing (40.3%).
  
  
  CONCLUSIONS
  The KIM program provides opportunities for disadvantaged children to accumulate substantial amounts of MVPA (>20 minutes per session) in an effort to meet current PA guidelines.
authors: Department of Health, Nutrition, & Exercise Sciences, North Dakota State University, Box 6050, Dept. 2620, Fargo, ND 58108-6050, USA. John.Schunajr@my.ndsu.edu
authors: John M
authors: JM
authors: Schuna
authors: Rebekah L
authors: RL
authors: Lauersdorf
authors: Timothy K
authors: TK
authors: Behrens
authors: Gary
authors: G
authors: Liguori
authors: Mina L
authors: ML
authors: Liebert
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D009658:North Dakota; D010806:Physical Education and Training / Q000458:organization & administration*; D015397:Program Evaluation; D011998:Recreation; D012572:School Health Services / Q000458:organization & administration*; D012574:Schools; D057185:Sedentary Behavior; D013334:Students / Q000706:statistics & numerical data*; D013997:Time Factors