title: Defining the volume and intensity of sport participation in adolescent rugby union players.
abstract: OBJECTIVE
  Investigating adolescent training loads might help us understand optimal training adaptations. GPS tracking devices and training diaries were used to quantify weekly sport and other physical activity demands placed on adolescent rugby union players and profile typical rugby training sessions.
  
  
  METHODS
  Participants were 75 males age 14 to 18 y who were recruited from rugby teams representing 3 levels of participation: schoolboy, national representative, and a selective sports school talent squad.
  
  
  RESULTS
  Schoolboy players covered a distance of (mean +/- SD) 3511 +/- 836 m, representative-squad players 3576 +/- 956 m, and talent-squad players 2208 +/- 637 m per rugby training session. The representative squad recorded the highest weekly duration of sport and physical activity (515 +/- 222 min/wk), followed by the talent squad (421 +/- 211 min/week) and schoolboy group (370 +/- 135 min/wk). Profiles of individual players identified as group outliers showed participation in up to 3 games and up to 11 training sessions per week, with twice the weekly load of the team averages.
  
  
  CONCLUSIONS
  Optimal participation and performance of adolescent rugby union players might be compromised by many high-load, high-impact training sessions and games and commitments to other sports and physical activities. An improved understanding of monitoring and quantifying load in adolescent athletes is needed to facilitate best-practice advice for player management and training prescription.
authors.affiliation: Australian Catholic University, Sydney, Australia.
authors.forename: Timothy B
authors.initials: TB
authors.lastname: Hartwig
authors.forename: Geraldine
authors.initials: G
authors.lastname: Naughton
authors.forename: John
authors.initials: J
authors.lastname: Searl
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D000367:Age Factors; D000704:Analysis of Variance; D000886:Anthropometry; D003256:Community Participation; D003625:Data Collection; D005538:Football / Q000502:physiology*; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D010865:Pilot Projects; D013997:Time Factors