#under pressure curated by Federico Tosi The first stretching is the ballistic, consisting of an apparently impulsive oscillatory movement of limbs and bust. Something akin to the possessed, where brain controlling in the management of the muscle was entrusted to its potential skill of intervention in extremis. Proven harmful, the practice is now only literature. The second stretching is the dynamic dynamic, where the above occurs in a controlled manner. By repeatedly contracting a limb, the antagonist muscle is necessarily extended, in order to be trained for stretching. A rapid succession of punches requires this kind of mobility. Third stretching is the static, where you can slowly reach a precise position - to be maintained for some short number of seconds - in order to work on a specific muscle group. Last stretching - both because last to arrive, and because less spontaneous for the living being - is the isometric, divided into PNF, CRAC and CRS. Poetry is completely lost, but not functionality. The PNF, Proprioceptive Neuromuscolar Facilitation, is the basic exercise of the other two isometric options, which differ from each other for the final part of the movement. The aim is to guarantee rapid improvements in flexibility for those who practice sport. Here we try to bring the muscle into an otherwise impossible training, due to the obvious conservative reaction of its antagonist. At the moment of maximum muscle stretching, a second person helps the athlete by pushing the limb in exercise beyond the reached position, while the athlete resists through a contrary movement, the isometric contraction. The experience and the presence of an assistant guarantee postural integrity during the after-effort. The integration of elongation given by the trainer during this exercise, and the relative response of the athlete, represent the differentiating element of isometric stretching, compared to the dynamic and the static. 122 under pressure
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