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Decoding the Tackle: Using a Machine Learning Approach to Understand Direct Head Contact Events in Elite Women's

Kathryn Dane1,2, Ellen Rushe3, Will Connors1

  • 1Research Ireland Lero & School of Computer Science and Statistics, Trinity College Dublin, Dublin, Ireland.

European Journal of Sport Science
|August 4, 2025
PubMed
Summary
This summary is machine-generated.

Direct head contact in women's rugby is linked to incorrect tackler head placement and tackle mechanics. Addressing these factors in training can improve player safety and reduce head impacts.

Keywords:
contact sportinjury preventionsportswomentechnique

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Area of Science:

  • Sports Medicine
  • Biomechanics
  • Machine Learning in Sports

Background:

  • Growing concerns exist regarding cumulative head acceleration events in rugby.
  • The specific mechanisms leading to direct head contact in women's rugby tackles are not well understood.

Purpose of the Study:

  • To develop and evaluate a machine learning model to identify characteristics associated with direct head contact and incorrect tackler head placement in elite women's rugby.
  • To pinpoint modifiable characteristics for intervention.

Main Methods:

  • Retrospective visual analysis of 1500 tackle events from the 2022-23 Women's Six Nations Championship.
  • Development and evaluation of a machine learning model using grid search and 5-fold cross-validation.
  • Identification of key characteristics through mutual importance and decision tree modeling.

Main Results:

  • Incorrect tackler head placement, balance, and foot placement were linked to direct head contact for the tackler.
  • Tackle direction, point of contact, and multiplayer tackles were associated with incorrect tackler head placement.
  • Tackler drop height, tackle direction (front/oblique), and multiplayer tackles correlated with direct head contact to the ball-carrier.

Conclusions:

  • Incorrect tackler head placement, tackle direction, tackler drop height, and multiplayer tackles are critical factors in direct head contact events in elite women's rugby.
  • Prioritizing these characteristics in training, education, and rule enforcement is essential for enhancing player safety.