function of muscle fiber?

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Generally speaking, muscle fibers work together to move the skeletal system. For instance, the bicep muscles flex to bend the arm at the elbow while the tricep muscle extends. To straighten the arm, the bicep muscles extend and the triceps flex.

Specifically, Type I muscle fibers (slow twitch) are for endurance, for example, running a marathon. Type II muscle fibers (fast twitch) are for short bursts of energy, such as sprinting. Type II fibers are what grow in size more. That is why a sprinter will have huge leg muscles and a marathon runner, while well defined, will have smaller looking muscles.

I hope one of those answers is what you are looking for.

by contacting,it produces movement

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function of muscle fiber?

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