Flexibility measurement of the knee flexors, a comparison of three clinical tests and isokinetic dynamometry

Thumbnail Image
Diakow, Stephen William
Journal Title
Journal ISSN
Volume Title
The high incidence of recurrent hamstring injuries in sport, especially in the recent Summer Olympics, calls into question the accuracy of current measures of injury rehabilitation. Strength and flexibility differences between healthy and previously hamstring-injured athletes have been reported in the literature, but many studies have found no significant differences between the two groups using similar testing methods. Studies of the passive properties of skeletal muscle have reported the resistance to passive knee extension using a Kin/Com isokinetic dynamometer. Comparison of this flexibility measurement technique to other, more common measures of flexibility is not well documented in the literature. Also, there is little information in the literature with respect to the passive properties of in vivo skeletal muscle with a previous strain injury. The purpose of this study was to compare the measurement of flexibility by a Sit and Reach Test, Active Knee Extension Test, and Passive Knee Extension Test with the resistance to stretch during passive extension of the knee, as measured by the Kin/Com Isokinetic Dynamometer. A sub-problem was to examine the differences in flexibility measurement scores between individuals with a previous hamstring injury and individuals with no history of hamstring pathology. (Abstract shortened by UMI.)