Concentric Movement or Concentric Action: the part of a movement where the muscle shortens or contracts. Any action where muscular tension results in the shortening of the muscle and thus rotation around the joint. It is the lifting part of the exercise such as when you press a barbell from your chest. The concentric action during a strength training exercise, such as the bar being moved upwards from the chest in the bench press, is sometimes called the positive, whereas the resultant lowering of the bar, being an eccentric action is called the negative.
Concentric actions are sometimes erroneously called "concentric contractions." However, there is actually one way for a muscle to contract and the terms such as concentric, eccentric, and isometric, describe the resultant action rather than any physiological difference in the manner in which the muscle contracts.
This page created 10 Oct 2011 17:12
Last updated 11 Feb 2017 21:47