In the human body, fatigue at the muscular level is characterized by a reduction in the force generating capacity of a muscle. This fatigue often results in alterations in motor performance during various tasks. These alterations from fatigue have been attributed to an elevated risk of musculoskeletal injury.

Alterations in normal gait patterns have been observed in response to general fatigue. However, inducing general fatigue can be limiting as it restricts the ability to determine the limiting factor of fatigue induced changes. Muscular fatigue may also alter activation patterns by shifting the activation from fatigues to less fatigued muscles in order for the body to perform a task. Other observed alterations include greater activation in other lower extremity joints that are less fatigued.

The purpose of this study is to compare the effects of lower extremity joint fatigue on kinematics during walking and running. By examining the effect of localized fatigue of the ankle and knee joints during locomotion a greater understanding of the alterations made by the body will be gained which may then be used in preventing the risk of musculoskeletal injury as a result of fatigue in the future.

Equipment/Software used:

  • AMTI Force Treadmill
  • 16 Channel Delsys EMG System
  • Cybex Isokinetic Dynamometer
  • VICON Motion Capture System
  • Nexus
  • Visual 3D