The official definition of concentric exercise is a contraction that shortens a muscle, while eccentric exercise is a contraction that lengthens the muscle; that all makes it sound more complicated than it is. Most exercise is concentric focused.
Herein, what is concentric and eccentric?
For example, during a biceps curl, the biceps contract concentrically during the lifting phase of the exercise. Eccentric (Negative) Contractions: During these contractions, the muscles lengthen while producing force—usually by returning from a shortened (concentric) position to a resting position.
What is a concentric movement?
It's also important to note there are two types of isotonic contractions. Concentric contraction occurs when the muscle shortens, while eccentric contraction occurs when the muscle lengthens. Let me explain.
What is concentric in sport?
Muscles contract when they work. If a muscle contracts to create movement, it is called an isotonic contraction. An isotonic contraction can be concentric, which is where the muscle shortens as the fibres contract or eccentric, where the fibres contract as the muscle lengthens.