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Fatigue influences lower extremity angular velocities during a single-leg drop vertical jump
Akihiro Tamura1, Kiyokazu Akasaka2, Takahiro Otsudo2
1Graduate School of Medicine, Saitama Medical University, Japan.
Journal of Physical Therapy Science
|March 31, 2017
Summary
Fatigue increases hip and knee flexion angular velocities during single-leg landings, reducing impact attenuation. This highlights the need to assess movement quality under fatigue conditions.
Area of Science:
- Biomechanics
- Sports Science
- Human Movement Analysis
Background:
- Fatigue impairs lower extremity landing strategies.
- Reduced impact attenuation is a consequence of fatigue during landing.
Purpose of the Study:
- To investigate the effects of fatigue on dynamic alignment.
- To determine the influence of fatigue on lower extremity joint angular velocities during single-leg landings.
Main Methods:
- 34 female college students were divided into fatigue and control groups.
- A fatigue protocol involving a bike ergometer was administered.
- Three-dimensional motion analysis captured lower extremity kinematics during single-leg drop vertical jumps pre- and post-fatigue.
Main Results:
- The fatigue group exhibited significantly increased peak hip and knee flexion angular velocities compared to the control group.
- Hip flexion angular velocity showed a significant increase in the fatigue group at 40 milliseconds post-ground contact.
Conclusions:
- Fatigue diminishes the capacity to absorb landing impact.
- Increased hip and knee flexion angular velocities during landing are indicators of fatigue-induced deficits.
- Evaluating hip and knee flexion angular velocities during fatigue is crucial for assessing movement quality.