MUSCLE PHYSIOLOGY

Detailed explanation-1: -Isotonic Contraction This type of contraction occurs when the force generated by the muscle is greater than the constant load acting on the muscle. An example of a concentric contraction is the motion during the bicep curl when the load is raised in an arc towards the body (Figure 10(b)).

Detailed explanation-2: -Isometric contraction occurs when muscle length remains relatively constant as tension is produced. For example, during a biceps curl, holding the dumbbell in a constant/static position rather than actively raising or lowering it is an example of isometric contraction.

Detailed explanation-3: -For example, when lifting a heavy weight, a concentric contraction of the biceps would cause the arm to bend at the elbow, lifting the weight towards the shoulder. Cross-bridge cycling occurs, shortening the sarcomere, muscle fiber, and muscle.