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An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
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Quantifying Offense and Defense Workloads in Professional Rugby Union.

Luke J Stevens1, Will G Hopkins2, Jessica A Chittenden3

  • 1Te Huataki Waiora School of Health, University of Waikato, Hamilton, New Zealand.

International Journal of Sports Physiology and Performance
|January 3, 2024
PubMed
Summary
This summary is machine-generated.

Understanding rugby workloads is key for training. Offensive play increases locomotion and contact demands, with forwards and backs experiencing different physical requirements, especially with fatigue.

Keywords:
ball-in-playcontactgame analysisglobal positioning systemlocomotion

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Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Rugby union is a physically demanding contact sport.
  • Understanding player workloads is crucial for effective training program design.

Purpose of the Study:

  • To quantify factors influencing locomotion and contact workloads during offensive and defensive phases of play in professional rugby union.
  • To identify differences in physical demands based on type of play, player position, and match outcome.

Main Methods:

  • Collected locomotion and contact data using global positioning system (GPS) units and video analysis for 31 professional rugby players over 14 games.
  • Utilized a generalized mixed-model procedure to analyze data, considering factors like type of play, position, match outcome, and ball-in-play time.

Main Results:

  • Offensive play significantly increased locomotion and contact metrics for both forwards and backs compared to defensive play.
  • Forwards exhibited substantially lower locomotion and higher contact metrics than backs on both offense and defense.
  • Fatigue, indicated by ball-in-play time, led to significant increases in workloads across most metrics for both player types.

Conclusions:

  • Novel findings highlight increased physical demands during offensive rugby union play.
  • Significant differences in workload exist between player positions (forwards vs. backs) and are influenced by match outcomes.
  • These insights can inform the design of targeted and effective training strategies for rugby players.