MUSCLE PHYSIOLOGY

Detailed explanation-1: -During an isometric contraction the muscle is under tension but neither shortens nor lengthens.

Detailed explanation-2: -An isometric contraction generates force without changing the length of the muscle, and no mechanical work is done since the muscle does not shorten. However, this type of contraction requires high amounts of energy because of the force generated by the muscle.

Detailed explanation-3: -Isometric contractions are contractions in which there is no change in the length of the muscle. No joint or limb motion occurs. Isotonic contractions occur when the muscle changes length, producing limb motion. Concentric contractions occur when the muscle shortens.

Detailed explanation-4: -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-5: -In a concentric contraction, the force generated by the muscle is less than the muscle’s maximum, and the muscle begins to shorten.