EXSS2018 Lecture Notes - Lecture 16: Hip, Gastrocnemius Muscle, Sagittal Plane

• School: University of Sydney
• Department: Exercise and Sport Science
• Course: EXSS2018
• Professor: Peter Sinclair

Document Summary

Joint angular motion: motion at joints, distal segment relative to proximal segment, most flexibility at talo-navicular joint lumbar thorax pelvis hip knee ankle pelvis thigh shank thigh shank rearfoot midfoot rearfoot forefoot. 1mpj forefoot hallux: hallux metatarsal bone; it df to, pf up to 20% of stance phase, rom of 35 to toe off toe off. Joint kinematics: dotted line indicates variability (over 5 trials) Knee sagittal plane motion must be the most invariant movement of all. Arch height doesn"t affect knee joint motion (stable across all 3 groups) Hip extends for most of stance phase & flexes for most of swing phase . Arch height doesn"t affect hip joint motion (stable across all 3 groups) . Ankle joint muscle activity: gastrocnemius peaks before propulsion phase (most active leading up to it df, soleus is similar (df, tibialis anterior is active on heel strike (pf) Knee joint muscle activity: vastus lateralis works eccentrically to accept the weight.