Isokinetic trunk strength in the teenagers with and without low-back pain: a comparative study

Results No significant difference was found between isokinetic peak torque, total work and mean power in extension and flexion in the two groups. Other than, the control group had a higher mean power extension in 120°/s than the LBP group with a nearly significant p. Significant correlations between isokinetics total work at 120° in flexion (r=0,461) and in extension (r=0,475) were observed with the body mass index. A high correlation was also found between the total work at 120° in extension (r=0,668) and the number of hours per week of sport activities. The mean power in extension at 120°/s was correlated positively (r=0,453) to the lumbar radiological lordosis. The endurance of agonist (flexors) and antagonist (extensors) ratio was high in both populations compared to the expected values in general population (0,91 vs 0,89).