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Ground reaction forces during sprint hurdles.

Ryu Nagahara1, Misaki Wakamiya2, Yasuo Shinohara3,4

  • 1National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan.

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|July 27, 2021
PubMed
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Faster sprint hurdling involves optimizing ground reaction forces (GRFs). Key strategies include minimizing braking impulses and maximizing propulsive impulses during hurdle clearance and recovery steps for improved performance.

Keywords:
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Area of Science:

  • Biomechanics
  • Athletic Performance
  • Track and Field

Background:

  • Understanding ground reaction forces (GRFs) is crucial for optimizing sprint hurdle technique.
  • Previous research has explored spatiotemporal variables, but detailed GRF analysis during hurdling remains less explored.

Purpose of the Study:

  • To quantify ground reaction forces (GRFs) during sprint hurdle races.
  • To identify biomechanical determinants associated with faster sprint hurdling performance.

Main Methods:

  • Eleven male hurdlers completed 60-m sprint hurdle trials, clearing five hurdles.
  • Spatiotemporal and GRF variables were measured for each step during the trials.

Main Results:

  • The hurdle step was characterized by greater braking and smaller propulsive impulses, leading to negative net anteroposterior impulse.
  • The preparatory step exhibited lower braking and vertical impulses, potentially lowering the center of mass (CM).
  • Landing and recovery steps showed distinct force characteristics, including significant braking and propulsive components.

Conclusions:

  • Optimizing sprint hurdle performance requires minimizing braking impulse and time during the hurdle step.
  • Enhancing propulsive impulse through increased propulsive mean force at the hurdle step is beneficial.
  • Adjusting forces and timing during landing and recovery steps can further improve performance.