hamstrings

Using the word “eccentric” might sound like I’m about to write about muscles behaving in weird ways that are different from usual muscle behavior! But what I’m referring to, eccentric muscle contraction, is often pronounced ee-sen-trik, not ek-sen-trik. How muscles contract Eccentric muscle contraction is the reverse of the concentric contraction that we typically associate with muscle training. For example, the dumbbell curl that makespops up the bicep prominent as you lift the weight towards your shoulder is a concentric contraction. The muscle contracts and shortens. But lowering the dumbbell back down again, which requires the muscle to lengthen, also takes Read more