EDKP 350 Lecture 6: Lecture 6 (revised).docx
19 Dec 2012
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Muscular strength: ability of a muscle group to develop max. contractile force against a resistance in a single contraction. Force determined by velocity: max force = 0 velocity. Muscular endurance: ability of a muscle group to exert submaximal force for extended periods of time. Assessed via static or dynamic contractions: static (isometric): no change in joint angle, dynamic: change in joint angle. Constant velocity throughout rom during maximal contractions. The most force generated occurs b/w 160-170 degree joint angle. Isometric muscle testing: strength measured at max force exerted in a single contraction against immovable resistance: mvic: maximal voluntary isometric contraction, devices: Can be used with hands, legs, back. Adding l/r legs/hands & back divide by body weight (kg) x 100. Dynamic muscle testing: strength measured at max force exerted in single contraction against a moveable resistance: devices: Each only asses at weakest point of rom. Not good for assessing max. strength since resistance varies, good for resistance training programs.
