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EFFECTS OF MECHANICAL VIBRATIONS ON THE CARDIOVASCULAR SYSTEM
Abstract
Mechanical systems for producing mechanical vibrations gained more and more the role of training equipment and the vibrations obtained have an effect on muscles, facilitating the contraction or relaxation reflex depending on the possibilities of adjusting their parameters. Vibration platform training generates a tonic stretch reflex in all the muscles involved in the effort. During this reflex, the muscles contract and relax at very high speeds and the amount of active fibers reach 95% of muscle fibers involved in the effort. By using the mechanical vibration platform the propriospinal routes used to produce force by isometric contraction are strongly stimulated. I believes that the idea of the tonic reflux put forward by the authors for the effects of the platform training is part corollary of the biological factors irritability involved and does not justify the effects of pseudo-neuro muscular tetany. In this study we used a mechanical vibration platform. The mechanical vibration platform has in its structure a few of a stainless steel frame, a pneumatic suspension and a control integrate. The frequencies generated by the platform are of 25 Hz, 30 Hz, 35 Hz, 50 Hz and the duration of the exercises carried out on the platform is of 25, 30, 45, 60 seconds. The amplitude of the exercises execution on the platform is of two types: high amplitude of 5 and 10mm. The research was carried out in the 2015-2016 school year on a total of 32 athletes from the Sports classes of St. Pantelimon, divided into two groups, the experimental group and control group. The control group used the mechanical vibration platform complementarily in order to improve the level of development of aerobic capacity. Following the experiment carried out even if the values obtained at the final test are, compared to those obtained at the initial test, significantly better for both groups, the final differences between the experimental and the control group are insignificant. This shows that applying mechanical vibrations does not aim to develop the cardiovascular system.
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