EVERYDAY SCIENCE

Detailed explanation-1: -For the biceps curl, the concentric (up) phase occurs when the dumbbell is lifted towards the shoulder. Therefore, elbow flexion takes place.

Detailed explanation-2: -Concentric contractions involve the muscle shortening under tension, and it is the most common form of muscular contraction. For example, the biceps concentrically contract during the upward phase of a bicep curl, or in the triceps during the upward phase of a push-up.

Detailed explanation-3: -Bicep curls isolate the body movement of elbow flexion, or rather bending of the arm at the elbow. It targets the specific muscles located at the front of your arms called; biceps brachii, brachialis and brachioradialis.

Detailed explanation-4: -A biceps curl usually starts with the arm in a fully extended position, holding a weight with a supinated (palms facing up) grip. A full repetition consists of bending or “curling” the elbow until it is fully flexed, then slowly lowering the weight to the starting position.

Detailed explanation-5: -Eccentric action The muscle actively lengthens under tension or returns to its resting position from a shortened position. For example, the biceps brachii lengthen in the lowering phase of a biceps curl as it returns the arm to the starting position.