Isometric literally means "same length'. So when it comes to resistance training, isometric refers to an exercise where the muscle produces force without changing its length. In other words you're exerting force against a source of resistance, but there is not external movement (the muscle length and joint angle stays the same). There are several ways of utilizing this type of training, which we will see in a few minutes. But first let me explain to you some of the benefits of isometrics and why I personally like to use this type of training.
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