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Related Experiment Videos

Foot strike patterns after obstacle clearance during running.

Shane D Scholten1, Nicholas Stergiou, Alan Hreljac

  • 1HPER Biomechanics Laboratory, University of Nebraska at Omaha, Omaha, NE 68182, USA.

Medicine and Science in Sports and Exercise
|January 10, 2002
PubMed
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Runners switch from heel strike to forefoot strike when clearing obstacles over 15% of their height. This gait transition may protect against impact forces, similar to jumping landings.

Area of Science:

  • Biomechanics
  • Human locomotion
  • Sports science

Background:

  • Running over obstacles necessitates adaptive landing strategies.
  • Heel strike (HS) runners transition to forefoot (FF) strike for higher obstacles.
  • Understanding this transition offers insight into gait adaptations.

Purpose of the Study:

  • Investigate kinematic and kinetic differences in HS runners.
  • Analyze foot strike patterns during level running versus obstacle running.
  • Examine the effects of varying obstacle heights on running biomechanics.

Main Methods:

  • Ten HS runners participated in the study.
  • Running trials included level running and obstacles of 10-22.5% of standing height.
  • Kinetic parameters were measured using a force platform; data analyzed with repeated measures ANOVAs.

Related Experiment Videos

Main Results:

  • Significant differences (P < 0.004) were found in all kinetic parameters analyzed.
  • Obstacle height significantly affected foot strike patterns, center of pressure, and ground reaction forces.
  • A transition from HS to FF strike occurred between 12.5% and 15% obstacle heights.

Conclusions:

  • Obstacle height >15% induced a landing pattern similar to jumping.
  • This gait transition likely serves as a protective mechanism against impact forces.
  • Ankle and calf muscle engagement may attenuate impact and maintain running speed.