Abstract
This study examines the influence of limb velocity and lateral dominance on the relationship
between the knee flexors and extensors. Thirty preadolescents, 18 male and 12 female,
performed a series of reciprocal knee flexion-extension movements on the Cybex II
isokinetic system. The tests were performed at a range of selected velocities and
on both dominant and nondominant limbs. The agonist-antagonist ratios considered were
the peak torque ratios, the torque ratio produced at specific angles, and the ratio
comparing the total work performed by the hamstrings with that of the quadriceps.
The results showed that (a) an increased limb velocity produces a significant increase
in the peak torque and work ratios (P < 0.05), (b) limb velocity has no significant effect on the torque ratio produced
at 30° and 60° in the preadolescents, and (c) lower limb lateral dominance has no
significant effect on the three ratios examined.
Key words
isokinetics - knee flexor-extensor ratios - limb velocity - lateral dominance - children
