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Open kinetic chain exercises (OKC) or open chain exercises are exercises that are performed where the hand or foot is free to move. The opposite of OKC are closed kinetic chain exercises (CKC). Both are effective for strengthening and rehabilitation objectives.
Isometric Exercise. Writing for the Mayo Clinic, Dr. Edward Laskowski defines isometric exercise as contractions of a particular muscle or group of muscles. Unlike with isotonic exercises, isometric exercises do not move muscles through a range. Instead, the muscles are stable, done in one position so that there is tension but no change in length. Isometric exercise is also known as static strength training.