Recall from our previous article [Taekwondo Flexibility 101 – Factors Affecting Stretching] about the science of flexibility I briefly touched on PNF stretching.
To recap Proprioceptors are special sensory receptors located within muscles, joints and tendons which are sensitive to pressure and tension and relay information to the central nervous system (CNS) via sensory and motor neurons.
Recall intrafusal muscle fibres or muscle spindles are proprioceptors which provide information about muscle length. Golgi tendon organs (GTO) are proprioceptors which are located within the tendon and are activated when muscle tension increases.
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There are many different factors that affect 
I have been giving a lot of thought about how to approach the subject of the science behind stretching and flexibility. There is a whole wealth of information readily available on the subject of stretching and flexibility but it can be way too saturated and weighed down at times with information that athletes and coaches don’t really need to know about. At the end of the day all you guys want to know is how to get more flexible as quickly as possible!