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

Abstract

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.

Comparison of isokinetic trunk flexion and extension torques and powers between athletes and nonathletes

“…Our values seem to be smaller than of literature (64% to 72% without gravity correction, according to the authors, or 80% to 85% with gravity correction) ( Bernard et al, 2014 ). Simlarly, Simbala et al (2015) assessed a group of asymptomatic sedentary individuals, and reported a ratio of the peak torque of the flexors to the extensors of 81% for males. In our study, the ratio of the peak torque of the flexors to the extensors in the athletes group was smaller than in the nonathletes group.…”