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EMG activity during positive-pressure treadmill running.

Iain Hunter1, Matthew Kirk Seeley1, Jon Ty Hopkins1

  • 1Department of Exercise Sciences, Brigham Young University, Provo, UT, USA.

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Positive-pressure treadmills reduce lower limb muscle activation during running, but not for hip adductors or hamstrings. This suggests alternative training may be needed for specific running injuries.

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Athletic PerformanceJoggingLocomotionRehabilitation

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Area of Science:

  • Biomechanics
  • Sports Medicine
  • Exercise Physiology

Background:

  • Positive-pressure treadmills have shown success in injury rehabilitation.
  • However, some injuries may still progress despite reduced loading.

Purpose of the Study:

  • To investigate changes in lower limb muscle activation during treadmill running with varying body weight support.
  • To determine if specific muscles show altered activation patterns with reduced loading.

Main Methods:

  • Eleven collegiate runners participated.
  • Electromyography (EMG) amplitude was measured for 12 lower limb muscles.
  • Running occurred at 100%, 80%, 60%, and 40% body weight support.

Main Results:

  • Most muscles showed decreased EMG amplitudes with increased body weight support.
  • Hip adductor activation during swing and hamstring activation during stance did not show significant trends.
  • This indicates differential muscle responses to altered loading conditions.

Conclusions:

  • Positive-pressure treadmills can be beneficial for certain running injuries by reducing muscle activation.
  • Injuries involving hip adductors or hamstrings may require alternative rehabilitation strategies.
  • Careful consideration of body weight support levels is crucial for optimal recovery and return to running.