Muscles contract, but how exactly? Try lifting weights and you immediately notice that your biceps contract. This was hypothesised and proven by scientists and they name this mechanism the sliding filament theory. How is that possible? This site should answer some of your questions. So read on to find out more. How does a muscle contract.

The sliding filament theory was first proposed by Jean Hansen. It is a theory that describes the mechanism by which striated. Cardiac and skeletal; not. This site will concentrate on skeletal muscles. The striations in muscles are caused by sarcomeres. The repeating contractile units of the myofibril. Which are composed of thick and thin filaments. During contraction, the sarcomeres shorten. There are over 600 muslces in the body.

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