Related Experiment Videos
Comparison of two methods for measuring hamstring reaction time using the Kin-Com isokinetic dynamometer
C Small1, J T Waters, M Voight
1North Ridge Medical Center, Ft. Lauderdale, FL 33334.
Summary
Two reliable methods, peak torque time (PTT) and electromyograph time (EMGT), effectively quantify hamstring reaction time. These protocols allow for the use of the uninvolved limb as a control in proprioceptive feedback studies.
Area of Science:
- Neuromuscular Physiology
- Biomechanics
- Sports Medicine
Background:
- Quantifying proprioceptive feedback deficits is crucial for understanding neuromuscular control.
- Reaction time measurement is a key indicator of neuromuscular function.
Purpose of the Study:
- To compare the reliability and effectiveness of two protocols for measuring hamstring reaction time: peak torque time (PTT) and electromyograph time (EMGT).
Main Methods:
- Forty healthy adults (13 males, 27 females) participated.
- Subjects performed maximal voluntary hamstring contractions on an isokinetic dynamometer.
- Reaction time was measured using both PTT and electromyograph time (EMGT) protocols simultaneously.
Main Results:
- Both PTT and EMGT protocols demonstrated high reliability (Cronbach's alpha 0.823-0.896).
- No significant differences were found between dominant and nondominant limbs for either protocol.
- Both methods proved effective in quantifying hamstring reaction time.
Conclusions:
- PTT and EMGT are reliable and effective methods for assessing hamstring reaction time.
- These findings support the use of the uninvolved lower extremity as a control in future studies.