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Related Experiment Videos

Impact shock and attenuation during in-line skating

A T Mahar1, T R Derrick, J Hamill

  • 1Department of Exercise Science, University of Massachusetts, Amherst 01003, USA.

Medicine and Science in Sports and Exercise
|August 1, 1997
PubMed
Summary

In-line skating (ILS) generates significantly lower impact shock compared to running. This makes ILS a potentially beneficial exercise for reducing bodily impact during aerobic training.

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Area of Science:

  • Biomechanics
  • Exercise Physiology

Background:

  • Running impact forces are well-documented.
  • Impact characteristics during in-line skating (ILS) are less understood.

Purpose of the Study:

  • Characterize impact shock during ILS.
  • Compare impact shock between ILS and running.
  • Test if ILS has lower impact shock than running at preferred velocities.

Main Methods:

  • Subjects ran and performed ILS on a treadmill at preferred velocities.
  • Low-mass accelerometers measured tibial and head acceleration.
  • Calculated peak acceleration (PA), peak frequency (PF), and median frequency (MedF).
  • Quantified impact attenuation (IA) using PA and frequency spectra transfer functions.

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Main Results:

  • Significantly lower PA, PF, and MedF values were observed for ILS compared to running at both tibial and head locations.
  • ILS showed minimal power in the 10-20 Hz frequency range, typically linked to ground impact.
  • Impact attenuation (IA) was similar between ILS and running.

Conclusions:

  • In-line skating (ILS) results in reduced impact shock per foot contact compared to running.
  • ILS may serve as a valuable low-impact exercise alternative for aerobic training.
  • Findings suggest ILS can be an effective modality for individuals seeking to minimize exercise-induced impact stress.