The Effects of Psoas Major and Lumbar Lordosis on Hip Flexion and Sprint Performance
Résumé
In this study, we analyzed the correlations between hip flexion power, sprint performance, lumbar lordosis (LL) and the cross-sectional
area (CSA) of the psoas muscle (PM). Ten young adults performed isokinetic tests to determine hip flexion power and two sprint
tests. Magnetic resonance imaging was used to determine LL and PM CSA. There were correlations between hip flexion power, sprint
performance, and PM CSA, but LL showed no correlation with any parameter. The impact of hip flexion power and LL on sprint
stride pattern efficiency was considered. Hip flexion might not have a simple role in the passive knee replacement of the stride pattern;
instead, it may be an active parameter. Other investigations are needed to determine the influence of pelvic architecture on sprint
performance.