The role of Muscular Contraction:
In order to produce the vast range of movement of which our body is capable of, the body’s muscles wither shorten, lengthen or remain the same length while contracting.
Isometric Contraction= when a muscle increases in tension but there is no movement at the joint- Refers to those instances when the muscle is moving while contracting. When a muscle contracts there is no visible shortening or lengthening.
Example: when holding a barbell with the elbows flexed at 90 degree, the biceps contracts isometrically.
This can be divided further into concentric and eccentric muscle action:
Concentric contraction= when a muscle shortens under tension producing movement around a joint. The force exerted is greater than the resistance. Contractions involve the muscle shortening…