title: A comparative analysis of accelerometer and time-motion data in elite men's hockey training and competition.
abstract: OBJECTIVE
  To determine the relationship between distance covered and player load (PL: sum of accelerations in all 3 planes of movement) in hockey training and competition.
  
  
  METHODS
  Elite male hockey players (N=24) wore player-tracking devices in 7 international matches and 7 training sessions. Players were arranged in 4 positional groups (strikers, attacking midfielders, defensive midfielders, defenders) in competition but had generic roles in training. Relationships between distance and PL were assessed in both absolute (m, AU) and relative (m/min, AU/min) terms and were compared between matches and training and between positions within matches, using the Fisher Z test.
  
  
  RESULTS
  In competition, the absolute distance-PL relationship was very large overall (r=.868), with no differences between positions. The relative distance-PL relationship was moderate overall (r=.486) and weaker in strikers than in defensive midfielders (Z=1.785, P=.037) and defenders (Z=1.690, P=.045). In training, the absolute distance-PL relationship was very large (r=.742), and large (r=.633) in relative terms. The relationship was stronger in competition than training for absolute values (Z=2.824, P=.005) but not different for relative values.
  
  
  CONCLUSIONS
  The strong relationship between these variables suggests that PL in hockey is mostly accumulated through running and other locomotor actions, such that PL is not effective in quantifying other activities (evasion, low stance) that contribute to physiological demands, particularly in training.
authors.affiliation: Dept of Physiology, Australian Institute of Sport, Canberra, Australia.
authors.forename: Ted
authors.initials: T
authors.lastname: Polglaze
authors.forename: Brian
authors.initials: B
authors.lastname: Dawson
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Hiscock
authors.forename: Peter
authors.initials: P
authors.lastname: Peeling
mesh_terms: D000054:Acceleration; D000328:Adult; D054874:Athletic Performance; D040362:Geographic Information Systems; D006688:Hockey / Q000502:physiology*; D006801:Humans; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D005082:Physical Exertion; D012420:Running / Q000502:physiology; D013996:Time and Motion Studies