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Related Experiment Video

Updated: Jun 8, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

Tissue vibration in prolonged running.

Bernd Friesenbichler¹, Lisa M Stirling, Peter Federolf

¹Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, 2500 University Dr NW, Calgary, Alberta, Canada. berndf@kin.ucalgary.ca

Journal of Biomechanics

|September 18, 2010

Summary

Running fatigue increases leg soft-tissue vibration intensity, potentially raising injury risk. Muscle tuning, a protective mechanism, appears reduced in fatigued muscles, leading to prolonged, higher-magnitude oscillations.

Related Experiment Videos

Last Updated: Jun 8, 2026

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Comparative Analysis of Lower Limb Kinematics between the Initial and Terminal Phase of 5km Treadmill Running

Published on: July 17, 2020

Area of Science:

Biomechanics
Exercise Physiology
Musculoskeletal Dynamics

Background:

Running impact generates leg soft-tissue vibrations.
Muscle activity normally dampens these vibrations.
The effect of fatigue on vibration damping is not well understood.

Purpose of the Study:

To investigate if exercise-induced fatigue affects the damping and frequency of leg soft-tissue vibrations.
To test if vibration intensity increases and frequency decreases with fatigue in the triceps surae muscle.

Main Methods:

10 subjects ran to exhaustion while tri-axial accelerometers measured triceps surae vibrations.
Vibration frequency was analyzed using power spectra and wavelet analysis.
Vibration intensity maxima were compared between non-fatigued and fatigued states.

Main Results:

Vibration intensity in axial and medio-lateral directions increased with fatigue.
No systematic changes in vibration intensity were observed in the anterior-posterior direction.
Vibration frequency was minimally affected by fatigue, and changes were not systematic.
Maximum vibration intensity occurred later in the gait cycle with fatigue.

Conclusions:

Fatigue increases vibration magnitudes and oscillation duration in the triceps surae.
Reduced muscle tuning with fatigue may decrease protective mechanisms.
Increased vibration magnitudes with fatigue may elevate the risk of soft-tissue injury.