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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Ever since the fitness craze in the 1980’s, we have become a nation increasingly aware of our health and physique. Millions of dollars are spent every year in the quest for a perfect body. Gyms are big business, personal trainers are making a tidy living helping people stay fit, and body building supplements are at an all-time level of performance.