17 noiembrie 2010

antrenamente izometrice

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Isometric exercise is a form of exercise involving the static contraction of a muscle without any visible movement in the angle of the joint.















Isometric exercise or isometrics are a type of strength training in which the joint angle and muscle length do not change during contraction (compared to concentric or eccentric contractions, called dynamic/isotonic movements). Isometrics are done in static positions, rather than being dynamic through a range of motion. The joint and muscle are either worked against an immovable force (overcoming isometric) or are held in a static position while opposed by resistance (yielding isometric).


















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