Answer :

A muscle is forced to stretch during an eccentric contraction because the external force acting on it is larger than the muscle's capacity to produce force.

As the body's most efficient mode of propulsion, the forces produced by the muscles with origins on the human femur are a significant factor in the transtibial amputee gait.More than 600 muscles make up the human muscular system, which accounts for between 40% and 50% of the body's weight. These muscles, which are mostly made up of skeletal muscles, tissue, tendons, and nerves, are connected to our body's bones, blood vessels, and other internal organs.

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