This is also what happens when lifting weights that are too heavy. While the muscles are still contracting, they do not produce enough force to carry the load, and it causes them to stretch out and lengthen.
Eccentric contractions are more common than concentric contractions because they occur during the carrying out of normal activities. They are more associated with soreness and injuries, though, and for this reason it is important to strengthen the muscles through exercises which can in turn cause concentric contractions.
2.Concentric contractions occur when the force generated by the muscles during activity is more than enough to overcome outside forces or resistance while eccentric contractions occur when the force generated by the muscles is not enough to overcome the load or resistance.
3.Eccentric contractions are more common than concentric contractions.
4.Eccentric contractions occur while doing normal activities such as in walking or moving the arms while concentric contractions usually happen during exercise.
5.Eccentric contractions are usually the cause of muscle injuries and soreness because they cause strain on the muscles while concentric contractions do not.
6.More studies are being done on eccentric contractions than concentric contractions due to their association with muscle injuries.