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Showing posts with label ISO METRICS. Show all posts
Showing posts with label ISO METRICS. Show all posts

Monday, December 8, 2014

ISO METRICS VERSUS ISOTONICS

ISO METRICS VERSUS ISOTONICS

For some years, the virtues of isometrics have been trumpeted, often in advertising which promises an isometric system that "will put you in top shape in a minute a day-and no sweat." Isometrics involve muscular contractions without movement. The sys- tem is based on the principle that when a muscle is required to work beyond its usual intensity, it will grow. In isometrics, one set of muscles may be pitted against another or against an immovable object such as a doorway or floor. 

Put your palms together and push your hands against each other as hard as you can, without moving either hand. Or push against a closed door which does not move. These are isometrics. On the other hand, isotonic involve movement. Running, lifting, push-ups, sit-ups, virtually all sports are isotonic. Isometric exercises can be useful-for example, in correcting specific deficiencies such as building arm muscles or putting back into condition a leg that has been in a cast.


They may be useful, too, as a supplement to isotonic for further development of specific major muscles and muscle areas. But it is important to realize that your objective in exercising is not simply to build muscular strength. Strength is the ability to work against a resistance. Additionally, you need muscular endurance, the ability of a muscle to respond repetitively for a relatively long period of time; flexibility or muscular elasticity so you can use the muscle effectively throughout its whole range of motion; and cardiovascular-pulmonary efficiency-the adaptive response of heart, blood vessels; and lungs to work and exercise. 

Isometrics can help develop strength. But for the other needs, you have to get down on the floor and do push-ups and sit-ups and other isotonic exercise; you have to walk and jog or swim; you have to work the muscles through their whole range and work them repeatedly; and you have to sweat at the job and give the heart and blood vessels and lungs a workout. There is no shortcut.