Kinesiology 2241A/B Lecture Notes - Lecture 16: Knee Replacement, Dynamometer, Quadriceps Femoris Muscle

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2241A/B
• Professor: Thomas Richard Jenkyn

Document Summary

Lecture #16: biomechanics of fitness / lecture #17: Muscle strength can be measure in one of 3 ways: Isokinetic, the muscle changes length at a constant speed. Isometric strength is the most easily measured of the 3 types, since the muscle isn"t changing length. The maximum force that can be produced by the muscle is called the maximum voluntary contraction (mvc) and this is specific to each muscle. Maximal involuntary contraction (mivc) is usually a bit larger and is induced with an electrical stimulation (often painfully) Isokinetic strength is a bit of an artificial activity, usually controlled by an isokinetic dynamometer. But it is a useful way to quantify exercise for research. An example would be pre-conditioning a patient before knee replacement surgery to strengthen hamstring and quadriceps. Isotonic strength is really what you are training with resistance training. The weight doesn"t change during the activity, so the muscles are producing nearly constant force during a rep.