title: Normal lumbo-pelvic muscle lengths and their interrelationships in adolescent females.
abstract: Length indices of the erector spinae, abdominal, gluteal iliopsoas, rectus femoris and hamstring muscles were measured in 103 adolescent females. Means and standard deviations were calculated and the 95 per cent confidence intervals for the population and the 95 per cent individual tolerance limits were derived for each index. Analysis of the interrelationships of the muscle length indices using multiple correlation analysis revealed significant positive correlations between the lumbar erector spinae and iliopsoas and rectus femoris indices, between the abdominal and gluteal indices and between the iliopsoas and hamstring indices. Significant negative correlations exist between the lumbar erector spinae and gluteal indices, between the iliopsoas and abdominal indices and between the rectus femoris and hamstring indices.
authors.forename: R
authors.initials: R
authors.lastname: Toppenberg
authors.forename: M
authors.initials: M
authors.lastname: Bullock
keywords: Adolescence; Backache; Lumbosacral region; Muscles; Pelvis; Spine