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Isometric or Isotonic Exercises
By Julie Barros
Maybe you have heard the terms isometric and isotonic exercises before and maybe you haven’t. In short, both these types of workouts are designed to build muscle strength and tone the body. There are differences between these two and this article will explain these differences. The definition of isometrics is a strength training method in which the joint and the length of the muscle remains the same during the contraction. In short, there is no movement but rather a static pose while contracting and strengthening the muscle. Isotonic exercises on the other hand use movement thereby changing the length of the muscle. The resistance however remains constant during the workout. For instance, when doing bicep curls with free weights, the resistance is the weight. So this factor remains static. However, the muscle length changes as you lift and lower the weights. This isotonic exercise is what is referred to as a “mover”. This same muscle group done as an isometric move would require that not only the weight stay static but also the joint. As an example, to work your bicep as an isometric exercise you could use the same free weight but once you lifted the weight to the point where the elbow is bent, you would hold for 10 to 60 seconds. All good strength training workouts should include both isotonic and isometric exercises. By including both methods you are ensuring you are getting the maximum benefit of strengthening the muscles and getting a full range workout. So grab some weights, use a resistance band or just use your own body weight to train your muscles with both types of strength training exercises.
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This intel was contributed by jlb724
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May, 2012
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