rapid muscle - Reflexions

rapid muscle

In the body there are three types of muscles. Skeletal muscles which ensure voluntary movements such as walking, smooth muscles which are responsible for digestion or respiration, and cardiac muscles. Smooth muscles are slow muscles and contract with a frequency of between 0.1 and 1 hertz. They contract and relax between 0.1 and 1 times per second. The skeletal muscles, have a frequency of between 5 and 30 hertz. Rapid muscles have a frequency that is higher still. The protractor muscle, in fish, for example, contract and relax between 100 and 500 times per second.