Related Experiment Videos
Isokinetic trunk flexors and extensors performance with and without gravity correction.
J L Vanhee1, P h Voisin, T h Vezirian
1CRF L'Espoir, Lille-Hellemmes, France.
Isokinetics and Exercise Science
|December 1, 1996
Summary
Gravity correction significantly impacts isokinetic trunk performance. This study reveals altered peak torque and power for trunk flexors and extensors, changing flexor-extensor ratios in healthy adults.
Area of Science:
- Biomechanics
- Exercise Physiology
- Human Movement Science
Background:
- Isokinetic testing is crucial for assessing muscle function.
- Trunk muscle performance evaluation requires accurate gravity correction.
- Existing literature often lacks detailed analysis of gravity correction's influence on trunk flexor-extensor ratios.
Purpose of the Study:
- To investigate the effect of trunk gravity correction on isokinetic performance.
- To analyze the impact on peak torque and power for trunk flexors and extensors.
- To determine how gravity correction influences flexor-extensor strength ratios.
Main Methods:
- Thirty healthy males and 30 healthy females participated.
- Isokinetic trunk testing was performed with and without gravity correction.
- Tests were conducted at two angular velocities: 30°/s and 120°/s.
Main Results:
- Gravity correction significantly decreased peak torque and power in trunk flexors.
- Gravity correction significantly increased peak torque and power in trunk extensors.
- Flexor-extensor ratios for peak torque and power were approximately 50% with correction, differing from literature values.
Conclusions:
- Trunk gravity correction is essential for accurate isokinetic performance assessment.
- The calculation method significantly alters measured trunk muscle strength.
- Standard flexor-extensor ratios may need re-evaluation when accounting for gravity correction.