30

Stories about: contraction

9 Things You Did Not Know About Muscles From an eyebrow trembling to jumping, all is made by the muscles. Without them we could not even digest food or circulate blood inside the body. 1.There are three types of muscles: skeletal, responsible for the voluntary movements (from a smile to climbing the stairs); smooth, which make slow, involuntary movements ... 27 December 2007 16:56 GMT Why Do Muscles Get Tired? The strong and prolonged contraction of a muscle during exercising causes sooner or later muscle fatigue. Researches showed that the fatigue increases while the glycogen stored in the muscles decreases. The glycogen is a glucose polymer, like an animal starch. When the muscle needs glucose to burn, the glycogen cuts ... 17 July 2007 12:34 GMT