The amount of tension produced in a skeletal muscle as a whole structure is determined by the frequency of stimulation and the number of muscle cells stimulated.
The sarcomeres in the muscular fibers of the skeletal muscle must shorten in order to move an object, referred to as a load. Muscle tension is the force produced when a muscle contract (or when sarcomeres shorten).
Back pain episodes can result from muscle tension, which is often brought on by the physiological effects of stress. By narrowing blood vessels and decreasing blood flow to the body's soft tissues, such as the muscles, tendons, and nerves in the back, stress may alter the neural system of the body.
More myofibers contract and there is more tension in the skeletal muscle when more motor neurons are triggered.
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