title: Variability of PlayerLoad, Bowling Velocity, and Performance Execution in Fast Bowlers Across Repeated Bowling Spells.
abstract: OBJECTIVE
  The use of wearable microtechnology to monitor the external load of fast bowling is challenged by the inherent variability of bowling techniques between bowlers. This study assessed the between-bowlers variability in PlayerLoad, bowling velocity, and performance execution across repeated bowling spells.
  
  
  METHODS
  Seven national-level fast bowlers completed two 6-over bowling spells at a batter during a competitive training session. Key dependent variables were PlayerLoad calculated with a MinimaxX microtechnology unit, ball velocity, and bowling execution based on a predetermined bowling strategy for each ball bowled. The between-bowlers coefficient of variation (CV), repeated-measures ANOVA, and smallest worthwhile change were calculated over the 2 repeated 6-over bowling spells and explored across 12-over, 6-over, and 3-over bowling segments.
  
  
  RESULTS
  From the sum of 6 consecutive balls, the between-bowlers CV for relative peak PlayerLoad was 1.2% over the 12-over bowling spell (P = .15). During this 12-over period, bowling-execution (P = .43) scores and ball-velocity (P = .31) CVs were calculated as 46.0% and 0.4%, respectively.
  
  
  CONCLUSIONS
  PlayerLoad was found to be stable across the repeated bowling spells in the fast-bowling cohort. Measures of variability and change across the repeated bowling spells were consistent with the performance measure of ball velocity. The stability of PlayerLoad improved when assessed relative to the individual's peak PlayerLoad. Only bowling-execution measures were found to have high variability across the repeated bowling spells. Player- Load provides a stable measure of external workload between fast bowlers.
authors.affiliation: School of Exercise Science, Australian Catholic University, Brisbane, QLD, Australia.
authors.forename: Dean J
authors.initials: DJ
authors.lastname: McNamara
authors.forename: Tim J
authors.initials: TJ
authors.lastname: Gabbett
authors.forename: Paul
authors.initials: P
authors.lastname: Chapman
authors.forename: Geraldine
authors.initials: G
authors.lastname: Naughton
authors.forename: Patrick
authors.initials: P
authors.lastname: Farhart
mesh_terms: D061725:Accelerometry / Q000379:methods; D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D003163:Competitive Behavior / Q000502:physiology; D040362:Geographic Information Systems; D006801:Humans; D010806:Physical Education and Training; D013177:Sports / Q000502:physiology*; D013647:Task Performance and Analysis; D055815:Young Adult