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Comparison of 3 Methods for Computing Loading Rate during Running.

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|September 28, 2016
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Summary
This summary is machine-generated.

This study compared methods for calculating running loading rates. Vertical instantaneous loading rate (VILR) showed consistent results across methods, unlike vertical average loading rate (VALR), suggesting VILR is better for comparing studies on tibial stress fractures.

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Area of Science:

  • Biomechanics of running
  • Sports injury prevention
  • Orthopedics

Background:

  • Tibial stress fractures are common overuse injuries in runners.
  • Excessive loading rates, like VALR and VILR, are implicated in their development.
  • Existing methods for calculating these rates vary, leading to potential inconsistencies.

Purpose of the Study:

  • To compare three distinct methods for calculating vertical average loading rate (VALR) and vertical instantaneous loading rate (VILR) during running.
  • To identify which loading rate metric offers more consistent results across different calculation methods.
  • To inform standardized approaches for assessing running biomechanics and injury risk.

Main Methods:

  • Nine male runners performed treadmill running at three speeds (2.5, 3.0, 3.5 m/s).
  • Vertical ground reaction forces were measured.
  • VALR and VILR were calculated using three methods differing in time intervals: foot strike to first peak (A), 20-80% of time to first peak (B), and first 50 ms post-foot strike (C).

Main Results:

  • Significant differences were found among the methods when calculating VALR.
  • No significant differences were observed among the methods for VILR.
  • This indicates VILR is a more reliable metric for consistent biomechanical analysis in running.

Conclusions:

  • VILR provides a more consistent measure of impact loading across different calculation methodologies compared to VALR.
  • The findings suggest VILR is preferable for standardized research and clinical comparisons in running injury studies.
  • Consistent measurement of VILR can aid in better understanding and preventing tibial stress fractures in runners.