This type of contraction is known as eccentric and occurs when the muscle tenses while lengthening.Ī final type of contraction is called an isometric contraction, and it occurs when the muscle tenses while not changing length.
It can also tense while lowering a load, or resisting it, such as when lowering the weight in a curl. This is called a concentric contraction, where the muscle tenses while shortening. It can do the obvious and contract to shorten the distance between joints, such as when doing a bicep curl.
In simple terms, muscle can only contract in a few ways. Not long after, he started promoting this method of training through his mail order courses. He would push on the bars and chains that held him captive and quickly saw benefits. Not long after, he started promoting this method of training through his mail order courses.įamed strongman Alexander Zass credited much of his great strength to his isometric training as a prisoner during World War I. Famed strongman Alexander Zass credited much of his great strength to his isometric training as a prisoner during World War I.