KNES 377 Lecture Notes - Lecture 6: Plyometrics, Muscle Spindle, Rubber Band
19 Sep 2016
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Patient has already achieved goals in flexibility, strength, balance, and coordination. Transition between strengthening and sport specific exercises. This is directed for athletes or active patients; people who need to develop power. Defined as an eccentric contraction followed quickly by a burst of concentric activity: maximum strength in the shortest amount of time, objective 1. Eccentric: muscle is prestretched as is lengthens. Going down during squat jump: stimulates muscle spindle. The faster this phase occurs, the more tension is developed. The tension is necessary for that burst of power. Amortization: amount of time it takes to move from eccentric to concentric, very quick transition: 15-20ms. In a squat jump, this is the jump. Non-contractile: tendons and connective tissue, offers resistance to the movement as muscle is elongated: produces some force to allow the muscle to work less during eccentric contraction. Eccentric phase: increases number of cross bridges and speed of cross bridge detachment. Offer resistance to movement as muscle elongates.
