Examining Quadriceps/Hamstrings Performance at High Velocity Isokinetics in Untrained Subjects

Authors:
  • DKDavid A. Klopfer
    David A. Klopfer
  • SGSteven D. Greij
    Steven D. Greij
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Abstract
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.

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