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Isotonic contractions involve constant muscle tension despite muscle length changes. They include concentric and eccentric contractions.
An isotonic contraction occurs when muscle tension remains constant despite a change in muscle length. For example, lifting an object, walking, and running involve isotonic contractions with two types: concentric and eccentric.
In a concentric contraction, the muscle shortens while generating force, like the biceps contracting when lifting a weight. On the other hand, an eccentric contraction occurs as the muscle lengthens with diminishing tension, such as lowering a weight in a controlled manner.
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