MICROANATOMY

Detailed explanation-1: -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-2: -Isometric contractions generate force without changing the length of the muscle.

Detailed explanation-3: -Overview. In an isometric muscle contraction, the muscle fires (or activates with a force and tension) but there is no movement at a joint. In other words, the joint is static; there is no lengthening or shortening of the muscle fibers and the limbs don’t move.

Detailed explanation-4: -In concentric contraction, muscle tension is sufficient to overcome the load, and the muscle shortens as it contracts. This occurs when the force generated by the muscle exceeds the load opposing its contraction.

Detailed explanation-5: -During the course of ‘isometric’ contractions, the muscle fibres shortened by stretching the compliant tendons, until the muscle fibres could no longer produce enough force to stretch the tendons further. At optimal muscle length (Lo) the maximal shortening of muscle fibres was 28%.