EHS 230 Lecture Notes - Lecture 2: Gastrocnemius Muscle, Motor Unit, Soleus Muscle
11 Mar 2017
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There are two types of type 2 muscle fibers (2a and 2b) Description: type 2 fibers are used for fast activity. Do not get tired as easily as type 2b fibers. Get more tired than type 1 fibers. Has more capillaries than type 2 b fibers. These fibers are also used for fast activity. They get tired faster than both type 1 and 2a fibers. Type 1 fibers are better for endurance activities such as running long distance. Type 2 fibers are better for force production and power. Every skeletal muscle has both types of fibers, as they are necessary for human growth and development. The gastrocnemius muscle uses more type 2 fibers than type 1. The soleus muscle used more type 1 fibers than type 2. (cid:272)ross (cid:271)ridges have a lot of te(cid:374)sio(cid:374) a(cid:374)d (cid:272)a(cid:374)"t resist (cid:271)e(cid:272)o(cid:373)i(cid:374)g short. Isometric- the (cid:373)us(cid:272)le"s le(cid:374)gth stays the sa(cid:373)e over ti(cid:373)e. Holding a dumbbell steady, without moving it up or down.
