Passive knee extension test to measure hamstring muscle tightness

Abstract

The purpose of this study was twofold: (a) to examine the reliability of a test designed to measure tightness of the hamstring muscles, and (b) to assess the pelvic motion during this test. The knee was passively extended by a standardized force, while the hip was stabilized in 120 degrees of flexion. The knee angle was measured with a goniometer and represents the hamstring tightness. Twenty-eight test-retests were performed. The correlation coefficient was found to be 0.99, and the CV was found to be 1%. We used a MacReflex measurement system to assess the associated pelvic motion. Eight measurements were taken, and the median of associated pelvic motion was 4.1 degrees. It is concluded that the passive knee extension test is a simple and reliable method, and the associated pelvic motion is minimal.

The effects of eccentric training on lower limb flexibility: a systematic review

“…In this review, we considered studies which have evaluated any of these measurements before and after eccentric training as a measure of ‘flexibility’. The ROM measurements such as those used in this study are relatively reliable29 61 and clinically applicable. However, it must be acknowledged they may not accurately represent underlying muscle length, especially in biarticular muscles such as those included in these studies.…”

Hamstring flexibility in young women following passive stretch and muscle energy technique

“…In order to assess the flexibility of hamstring muscles, passive knee extension test was performed [9]. Only one therapist performed the measurements.…”

Predictors of return to work in patients sick listed for sub-acute low back pain: a 12-month follow-up study

“…Trunk muscle performance was assessed by testing dynamic strength of the abdominal muscles (27) and isometric endurance of trunk extensors (28). Flexibility was tested both via forward bending (27) (fingertip-to-floor) and by specific tests of the hamstrings muscles (29), the hip flexor muscles (27) and lumbar ventral and lateral flexion (30).…”