An eccentric contraction is one of the three distinct phases in the movement of muscles and tendons, the other two are an isometric contraction ( no movement ), and a concentric contraction ( contracting ).
12.
In the case of fatigue in a 30-second isometric contraction, the first window may be the first second, the second window might be at second 15, and the third window could be the last second of contraction ( at second 30 ).
13.
"' Contract Relax Agonist ( Antagonist ) Contract ( CRAC ) "'is usually performed by a passive or active stretch of the target muscle ( s ) to move the limb into a starting position at first, followed by a sub-maximal isometric contraction of the target muscle and finally an active stretch is used to move the limb into a new greater position.
