It has been demonstrated that vibration drives alpha-motoneurons via the la loop producing force without decreasing motor drive (Rothmuller and Cafarelli, 1995). Although it has been suggested that the vibration reflex, like the tendon jerk reflex, operates predominantly or exclusively on alpha motoneurons and does not utilise the same cortical originating efferent pathways as are used when performing voluntary contractions (Burke et al. 1976). It cannot be excluded that vibration treatments can also affect voluntary movements. These suggestions are supported by the present findings. In fact the EMG recorded in the biceps brachii of the experimental group in the study conducted on boxers showed a significant enhancement (P<0.001).>
One of the first and major scientists who became interested in the effects of vibrations on human performance was Prof. Carmelo Bosco. The interest that Bosco had since 1992 (Belli and Bosco, Acta Physiol Scand 144, 1992) for the muscular response to mechanical stimulation, coupled with the more recent studies on hormones, paved the way to his last research topic: vibration, a force which we are unconsciously constantly exposed to. "Running, hunting, fighting, playing the drums and dancing, navigating the oceans, cutting trees and giving life to the first villages or travelling in a high speed train, men since always have been exposed to thousand types of vibration".
From the studies on vibration emerges also the great stimulation that this method induces on bone tissue making it an optimal candidate for the prevention and cure of pathologies like osteoporosis. These studies open the road to a definition of new methodologies of training based on deep physiological knowledge.
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