Isokinetic torque in boys and girls ages 7 to 13: Effect of age, height, and weight

Thomas B. Gilliam, John F. Villanacci, Patty S. Freedson, Stanley P. Sady

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The purpose of this study was to investigate torque differences between 28 boys and 28 girls, ages 7 to 13 years, for the knee and elbow flexor and extensors at 30°/second and 120°/second using an isokinetic procedure (Cybex II). In addition, the relationships of these torque levels to size and age were determined. The results revealed significant (p `.05) sex differences for the knee flexor and extensor torque values at 120°/second independent of body weight. That is, the boys generated 29.2 and 39.5 foot pounds vs. the girl’s 26.2 and 35.4 foot pounds for knee flexion and extension, respectively. Similarly, torque differences (p `.05) between boys and girls were present for elbow extension at 120°/second when adjusting for differences in height. When examining the flexion/extension ratios, it is apparent that increases in body size (height, weight) and age had a significant effect on the ratio at 120°/second but not at 30°/second.

Original languageEnglish (US)
Pages (from-to)599-609
Number of pages11
JournalResearch Quarterly of the American Alliance for Health, Physical Education, Recreation and Dance
Issue number4
StatePublished - 1979
Externally publishedYes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Nephrology


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