MUSCLE PHYSIOLOGY

Detailed explanation-1: -Concentric contraction refers to when the force of contraction exceeds the force of resistance, which results in muscle shortening and approximation of muscle origin and insertion. Eccentric contraction occurs when the force of contraction is less than the force of resistance.

Detailed explanation-2: -In a concentric contraction, the muscle tension rises to meet the resistance then remains stable as the muscle shortens. During eccentric contraction, the muscle lengthens as the resistance becomes greater than the force the muscle is producing.

Detailed explanation-3: -Isometric contractions involve sarcomere shortening and increasing muscle tension, but do not move a load, as the force produced cannot overcome the resistance provided by the load.

Detailed explanation-4: -The length-tension (L-T) relationship of muscle basically describes the amount of tension that is produced by a muscle as a feature of it’s length. That is to say, when tested under isometric conditions, the maximal force produced or measured will be different as the muscle lengthens or shortens.