MUSCLE PHYSIOLOGY

Detailed explanation-1: -Contractions that involve shortening of the muscle are referred to as isotonic or concentric contractions. This type of contraction occurs when the force generated by the muscle is greater than the constant load acting on the muscle.

Detailed explanation-2: -Isotonic contractions occur when the muscle changes length, producing limb motion. Concentric contractions occur when the muscle shortens. Eccentric contractions occur when the muscle lengthens.

Detailed explanation-3: -Isotonic exercise is movement that requires muscles to resist weight over a range of motion, causing a change to the length of the muscle. We usually think of muscles shortening in isotonic exercise, as when you lift a dumbbell for a bicep curl or rise into a sit-up. This is called concentric muscle contraction.