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Factors affecting exercise intensity in rugby-specific small-sided games.

David C Kennett1, Tom Kempton, Aaron J Coutts

  • 1Sport and Exercise Discipline Group, UTS, Health, University of Technology, Sydney, Australia.

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|October 15, 2011
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Summary

Small-sided games (SSGs) in rugby union training elicit greater physiological and perceptual demands with fewer players and larger fields. Heart rate response, however, remained consistent across different SSG formats.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Rugby Union Performance Analysis

Background:

  • Small-sided games (SSGs) are utilized for concurrent physical, technical, and tactical training in rugby union.
  • Understanding the impact of prescriptive variables like player number and field size on training stimulus is crucial for optimizing SSGs.

Purpose of the Study:

  • To investigate how varying player numbers and field sizes in rugby union SSGs affect physiological, perceptual, and time-motion demands.
  • To provide insights into optimizing SSG design for specific training outcomes in rugby union.

Main Methods:

  • Twenty semiprofessional rugby union players participated in SSGs with different player numbers (4v4, 6v6, 8v8) and field sizes (small, large).
  • Physiological (blood lactate, heart rate [HR]), perceptual (rating of perceived exertion [RPE]), and time-motion data were collected for each SSG format.

Main Results:

  • Fewer players and larger fields in SSGs led to significant increases in mean speed, high-speed running (HSR) distance, and RPE.
  • Blood lactate concentration was higher in 4v4 SSGs compared to 8v8 SSGs.
  • No significant differences in %HRmax or time spent >85% HRmax were observed across SSG formats or field sizes.

Conclusions:

  • SSGs with fewer players and larger field dimensions enhance physiological and perceptual training stimuli and time-motion demands in rugby union.
  • The consistent heart rate response across formats may be due to individual variability.
  • Manipulating player number and field size offers a viable method to modulate the training load of rugby-specific SSGs.