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In-Season Individualized Resisted Sprint Session Improves In-Situ Acceleration-Speed Profile in Professional Rugby

Clément Maviel1, Fabrice Vercruyssen1, Pascale Duché1

  • 1Toulon Université, Laboratoire Jeunesse - Activité Physique et Sportive - Santé (J-AP2S), Toulon, France.

Journal of Strength and Conditioning Research
|June 1, 2026
PubMed
Summary
This summary is machine-generated.

Individualized resisted sprint training significantly enhanced sprint performance in professional rugby players. This method, using personalized load calibration, improved key metrics like propulsive power and maximal acceleration during the competitive season.

Keywords:
force-velocityload managementsprint performance

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Area of Science:

  • Sports Science
  • Biomechanics
  • Athletic Training

Background:

  • Individualized load prescription is crucial for optimizing sprint performance in professional rugby.
  • The force-velocity profile and horizontal propulsive power are key determinants of sprint ability in rugby players.
  • Existing training methods may not fully leverage personalized biomechanical data for in-season improvements.

Purpose of the Study:

  • To evaluate the impact of individualized resisted sprint training on the in-situ acceleration-speed profile of professional rugby backs.
  • To determine if personalized load calibration in resisted sprints enhances specific sprint mechanical outputs.
  • To compare the effects of resisted sprint training versus standard training on sprint performance metrics.

Main Methods:

  • Two groups of professional rugby backs participated: a control group (CG) and an experimental group (EG).
  • The EG underwent weekly resisted sprint sessions using the 1080 Sprint system, with loads calibrated to 50% of each player's maximal sprint velocity (S0).
  • Sprint sessions involved four 15m resisted sprints at a constant target velocity, with S0 derived from pre-intervention in-situ data.

Main Results:

  • The experimental group showed significant improvements in propulsive power (4.5 ± 3.0%, p < 0.001), S0 (2.7 ± 2.1%, p < 0.001), and maximal acceleration (1.8 ± 2.7%, p = 0.03).
  • No significant changes in these metrics were observed in the control group.
  • These results indicate a clear benefit of the individualized resisted sprint protocol.

Conclusions:

  • Individualized resisted sprint training is an effective strategy for enhancing in-situ sprint mechanical outputs in professional rugby players during the competitive season.
  • Personalized load calibration based on the acceleration-speed profile optimizes training adaptations.
  • This approach offers a promising method for improving rugby players' sprint performance.