Kinesiology 3336A/B Lecture Notes - Lecture 15: Sternoclavicular Joint, Differential Diagnosis, Acromion

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3336A/B
• Professor: Dave Humphreys

Document Summary

Need to assess scapulohumeral and trunkal mechanics. Peak velocity with no step (just trunk & upper body)= 87% Peak velocity with lower body + trunk= 53. 1% Peak velocity in water polo is approx. 50% that of baseball due to lack of a grf. Hip & shoulder at 90 degrees to target. Lower body generates forces for forward (cid:498)controlled fall(cid:499) Hands apart to eor er (end of range external rotation) Positions the body to allow all segments to contribute to propulsion. Shoulder into abduction via horizontal extension and max. Now loaded with tight anterior capsule (aighl) Max elastic energy secondary to strain on static restraints (store energy) Throwing= muscular energy + stored elastic energy. Release of elastic energy from passive restraints. Rc works to maintain humeral head in position. Fatigue leads to decreased coordination and decreased anterior wall support. Major, teres major: shoulder slides all over the place. Concludes with ball release at ear level.