Musculoskeletal System


Musculoskeletal System

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The musculoskeletal system consists of 3 separate yet very interdependent components.

Any movement characteristic of the human body depends on the interaction of these 3 systems. Muscles do not directly exert force against the ground or an external object. Therefore, muscles do not actually move objects or weights. Instead, they function by moving the bones that rotate about the connective joints. These internal movements transfer a force through the body to the external object or resistance, thus causing the object or resistance to move.

It is impossible for muscles to push. They can only pull. As the muscles pull the bones, the bones act as a series of connected levers that can then move the body or outside objects in any direction desired.

Bones provide the structural support. The muscles house the contractile units that have the ability to convert chemical energy into mechanical energy, which generates the force necessary for movement. The joints hold the structure together and transmit the created internal forces through the bony levers of the body to the external environment.

All of these components are completely interdependent and cannot act separately to achieve any movement whatsoever. A muscle cannot even undergo an isometric contraction without using the bones and joints for stabilization.

Learning how the body moves and the role each component plays to produce the movement will better enable you to understand how each exercise challenges the body and improves on your bodybuilding workout .

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