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    Stretching Physiology

    Self help for sore muscles - Harvard Health
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    Physiology for stretching:
    • The stretching of a muscle fiber begins with the sarcomere, the basic unit of contraction in the muscle fiber. As the sarcomere contracts, the area of overlap between the thick and thin myofilaments increases. As it stretches, this area of overlap decreases, allowing the muscle fiber to elongate.
    • During a stretch, the Golgi tendon organ (GTO) senses tension in the muscle/tendon and sends a signal via afferent neurons to the spinal cord. The spinal cord then sends a signal back to the muscle to relax via efferent neurons. This is called the Golgi tendon reflex.
     
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