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There are three types of muscle contractions.
1. Isotonic contraction: these are the contractions which cause the muscle to change during contraction, causing some movement of a body part. Isotonic contraction comes in two forms which include;
Concentric contraction which causes muscle to shorten its contractions, and eccentric contractions which are the opposite of concentric contraction because they occur when the muscle lengthens during contraction
2. Isometric contractions: they occur when there is no change in the length of the muscle contraction. This happens when one is carrying an object in front because the weight of the object pulls the arms down and thus the muscles contract to hold on the object a the same level.
3. Isokinetic contractions: these are similar to isotonic because the muscle changes the length in the course of contraction. The difference between these two is that isokinetic contractions usually produce movements of the same speed.
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