MUSCLE PHYSIOLOGY

Detailed explanation-1: -A concentric contraction is a type of muscle contraction in which the muscles shorten while generating force, overcoming resistance. 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.

Detailed explanation-2: -Isotonic contraction maintains the same amount of tension in the muscle, while movement occurs. This would happen as you pick up a book and the elbow angle decreases, which is a concentric contraction.

Detailed explanation-3: -Isotonic contractions maintain constant tension in the muscle as the muscle changes length. This can occur only when a muscle’s maximal force of contraction exceeds the total load on the muscle. Isotonic muscle contractions can be either concentric (muscle shortens) or eccentric (muscle lengthens).