Isotonic contraction

Isotonic contraction is a form of muscle contraction in which the muscle develops tension and changes its length, producing movement at a joint. It is divided into concentric contraction, where the muscle shortens while generating force, and eccentric contraction, where the muscle lengthens while remaining active. It is a fundamental mechanism involved in most daily movements and strengthening exercises. It is used in physiotherapy and sports training to improve muscle strength, movement control, and functional capacity. Its effectiveness depends on the appropriate selection of load and the correct execution technique.