The effect of increasing trunk flexion during normal walking

Abstract Background The head, arms and trunk segment constitute a large proportion of the body’s mass. Therefore, small alterations in inclination may affect lower limb joint moments muscle activation patterns. Although previous research has investigated effect changing frontal plane trunk, it is not clear how increasing flexion will impact on muscles. Research question What independently manipulating angle kinematics, function? Methods Gait analysis was carried out 20 healthy people under four conditions: normal walking (NW), NW-5°, NW+5° NW+10°. For latter three conditions, biofeedback approach used to tightly control angle. A linear mixed model investigate angles, moments, knee activation. Results There were increases hip ankle as increased, but no change moments. results also showed increase flexor activity corresponding co-contraction increased. Interestingly, there dramatic profile hamstring activity. In medial hamstrings, this led 100% during early stance increased by 5° from NW. Significance This first study demonstrate strong dependence flexion. important with osteoarthritis have been observed walk elevated linked loads. It possible that these altered patterns result walking.