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Alterations in bilateral force judgment following strenuous eccentric exercise.

H K Vincent¹, C Carlson, J P Hyatt

¹Department of Sport and Exercise Science, Stetson University, USA. hvincent@stetson.edu

Research Quarterly for Exercise and Sport

|December 28, 2000

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Strenuous eccentric exercise impairs the ability to match forces between arms. This exercise affects both underestimating and overestimating forces, suggesting central or peripheral changes in force judgment.

Area of Science:

Exercise Physiology
Motor Control
Neuroscience

Background:

Eccentric exercise involves muscle lengthening under tension.
Force matching is crucial for coordinated limb movements.
Understanding exercise-induced changes in motor control is important for rehabilitation.

Purpose of the Study:

To investigate the impact of unilateral eccentric exercise on bilateral force-matching ability.
To determine if exercise-induced deficits in force matching are task-dependent.

Main Methods:

Participants performed 50 maximal unilateral eccentric elbow actions.
Bilateral force-matching ability was assessed using a reference force task.
The exercised (EXD) and control (CNT) arms were systematically switched as the reference limb.

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Main Results:

The exercised arm consistently underestimated the reference force up to 5 days post-exercise.
When the exercised arm served as the reference, increased constant and variable error were observed.
These deficits occurred regardless of the arm's role in the force-matching task.

Conclusions:

Strenuous eccentric exercise significantly compromises bilateral force-matching ability.
Findings suggest central or peripheral alterations in force judgment mechanisms.
Eccentric exercise-induced deficits impact both force production and perception.