title: Is wearing a pedometer associated with higher physical activity among adolescents?
abstract: OBJECTIVE
  To examine whether wearing a pedometer was associated with higher objectively-measured physical activity (PA) among adolescents independent of other behavior change strategies, and whether this association differed by sex or day of wear.
  
  
  METHODS
  In a parallel-group population-based cohort study, 892 adolescents (43.4% male, mean±SD age, 14.5±0.5years) from Eastern England were recruited. PA was measured (in 2005-2006) by accelerometry over four days; a sub-group (n=345) wore a pedometer coterminously with the accelerometer. Three-level (individual, day of wear and school level) multiple linear regression was used to examine the association between accelerometry (counts/min, cpm) and pedometer wear, stratified by sex and adjusted for weekday/weekend.
  
  
  RESULTS
  For the entire cohort, there was a significant decline in cpm over four days (p<0.01). Girls wearing pedometers had higher mean cpm than those not wearing a pedometer, independent of BMI z-score, socio-economic status, weekday/weekend, and school clustering (β=5.1; 95% CI: 0.8 to 9.5, p=0.02). This association was not seen in boys.
  
  
  CONCLUSIONS
  Pedometer wear was associated with higher PA among adolescent girls, but not boys. Findings may support sex-specific intervention strategies. In addition to pedometer monitoring, additional strategies may be required to promote PA levels, especially among boys.
authors: Murray Edwards College, Huntingdon Road, Cambridge, United Kingdom.
authors: Vanda
authors: V
authors: Ho
authors: Rebecca K
authors: RK
authors: Simmons
authors: Charlotte L
authors: CL
authors: Ridgway
authors: Esther M F
authors: EM
authors: van Sluijs
authors: Diane J
authors: DJ
authors: Bamber
authors: Ian M
authors: IM
authors: Goodyer
authors: Valerie J
authors: VJ
authors: Dunn
authors: Ulf
authors: U
authors: Ekelund
authors: Kirsten
authors: K
authors: Corder
mesh_terms: D061725:Accelerometry; D000293:Adolescent; D000294:Adolescent Behavior; D015331:Cohort Studies; D005260:Female; D006293:Health Promotion; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000523:psychology* / Q000706:statistics & numerical data; D009043:Motor Activity; D012737:Sex Factors; D013997:Time Factors; D016138:Walking / Q000523:psychology* / Q000706:statistics & numerical data
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