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Measuring wrist muscle strength
The Journal of Orthopaedic and Sports Physical Therapy
|January 1, 1983
Summary
This study validated the Cybex II for measuring wrist muscle strength, finding it reliable for both static and dynamic assessments. Results show dominant wrists are stronger and flexors are the most powerful muscle group.
Area of Science:
- Orthopedics
- Sports Medicine
- Biomechanics
Background:
- Objective measurement of wrist muscle strength is crucial for clinical assessment and rehabilitation.
- Existing methods may lack reliability or clinical acceptability.
Purpose of the Study:
- To design and evaluate a clinically acceptable method for objectively measuring wrist muscle strength.
- To assess the reliability and feasibility of using the Cybex II for wrist strength testing.
Main Methods:
- Thirty college-age students participated in the study.
- Static and dynamic wrist muscle strength (flexors, extensors, radial/ulnar deviators) were measured using the Cybex II.
- Reliability coefficients were calculated to assess measurement consistency.
Main Results:
- The Cybex II and devised testing methods demonstrated high reliability (average coefficients r = 0.881 and 0.892).
- Isometric and low-velocity isokinetic torque measures were highly correlated.
- Dominant wrists showed greater strength than non-dominant wrists, with similar variance patterns.
- Wrist flexors generated the highest mean peak torque, followed by radial deviators, ulnar deviators, and extensors.
Conclusions:
- The Cybex II, with the developed testing protocol, is a feasible and reliable tool for objectively measuring wrist muscle strength.
- The findings support the use of this method in clinical and research settings for evaluating wrist function.
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