Examining quadriceps/hamstrings performance at high velocity isokinetics in untrained subjects.

The purpose of this study was to examine isokinetic torque production for untrained individuals at high isokinetic speeds. Data was collected at 300, 330, 360, 400, and 450 degrees /sec in the following areas: 1) Peak torque produced by the quadriceps and hamstrings;2) Percent torque/body weight;3) Quadriceps/hamstrings ratio; and4) Dominant versus nondominant lower extremities.Twenty-three men and 32 women aged 19-37 years ( or males = 27.4, for females = 27.6) were tested on the Biodex 8-2000 (Biodex Corporation, Shirley, NY). The peak torque (ft-lbs) ranges were: male quadriceps 68.9-76.8, male hamstrings 56.0-67.9, female quadriceps 33.8-36.5, female hamstrings 36.9-38.8. The percent torque/body weight ratio ranges were: male quadriceps 38.2-44.5%, male hamstrings 34.4-37.6%, female quadriceps 25.7-28.5% female hamstrings 28.6-30.0%. The quadriceps/hamstrings ratio ranges were: males 102.9-137.1%, females 92.4-98.9%. Significant differences (p > 0.05) were found between the hamstrings at 330, 360, and 400 degrees /sec in males and 300, 330, and 400 degrees /sec in females. The values presented in this study may be beneficial in defining deficits and rehabilitation goals in untrained individuals.J Orthop Sports Phys Ther 1988;10(1):18-22.