The trunk extensor flexor relationship in men and women by isokinetic dynamometry

  • Marcia Simbala
  • Camila Ksaveria Czaikoski
  • Fernanda Maria Cercal Eduardo
  • Auristela Duarte Lima Moser
  • Rafaella Stradiotto Bernardelli
Keywords: Isokinetic dynamometer; Isokinetic evaluation; Flexors and extensors ratio; Peak torque.


Introduction: The thoracolumbar musculature plays a key role in the balance and stability of the pelvis. The isokinetic dynamometer
provides accurate assessment of muscle performance and treatment guidance. Objective: To compare the flexors / extensors of the
trunk link between sedentary men and women, asymptomatic by isokinetic dynamometry. Method: An observational cross-sectional
study. The sample consisted of 100 asymptomatic sedentary volunteers, 50 males and 50 females with a mean age of 22.2 ± 3.3 years.
The collection was made in the center of isokinetic dynamometry of the university grew. The Cybex Norm isokinetic dynamometer
Model 7000 ™, trunk module was used. The subjects were weighed and measured, made global warming a 5 minutes cycle ergometer
unloaded. Tested the flexor and extensor muscles in concentric and eccentric contractions, with an interval of three minutes between
each assessment. We adopted a range of 10 degrees of extension to 70 degrees of flexion, with five repetitions at angular velocity 60 ͨ / s
performing maximal strength. Familiarity with the equipment was done in the way of submaximal intensity contraction. The analysis
was performed using SPSS, version 20.0 (p <0.05). Results: muscle ratio for females was higher compared to males, demonstrating in
men greater deficit flexors compared to extensors of the trunk. Conclusion: no significant neither for females nor for males difference.
Confirming that the ratio of muscle strength agonist/antagonist of a joint should not change regardless of the mode of contraction is tested.

How to Cite
Simbala, M., Czaikoski, C. K., Eduardo, F. M. C., Moser, A. D. L., & Bernardelli, R. S. (2020). The trunk extensor flexor relationship in men and women by isokinetic dynamometry. Manual Therapy, Posturology & Rehabilitation Journal, 1-7. Retrieved from
Research articles