When conducting a post-isometric relaxation stretch, the target muscle is extended until a gentle stretch is sensed. At this stage, the target muscle is contracted and then allowed to relax in order to lengthen further. This is an instance of stimulating this proprioceptor:

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Golgi tendon organ. The golgi tendon organ detects increases in muscle tension to prevent injury. If the muscle tension is significant in relation to the force the muscle can generate, it inhibits the muscle's ability to contract. Engaging this reflex allows for an increased stretch without resistance from the muscle. When stimulated, the muscle spindle contracts the muscle. The Meissner corpuscle detects skin slippage, while the Pacinian corpuscle is responsible for detecting pressure and high vibration frequency in the skin.

When conducting a post-isometric relaxation stretch, the target muscle is extended until a gentle stretch is sensed. At this stage, the target muscle is contracted and then allowed to relax in order to lengthen further. This is an instance of stimulating this proprioceptor:

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