Analysis of the Relaxation Effect by Vibrations on Some Rheological Models of Tissues

Vibration therapy, or biomechanical stimulation, is a method used for improvement of muscle strength, power, and flexibility and has become a very popular method in recent years, both in physical therapy and in sports. This popularity is due to the fact that, as a result of analyzing the groups of subjects, the effects of small amplitude vibration and low frequency vibration, were found an increase in the force developed by the feet, a hardening of bone strength or an increase in bone density. The generic term used where any vibration of any frequency is transferred to the human body is “whole-body vibration”. In this paper it is proposed to give a possible explanation of the stress relaxation in muscle and/or bone after whole body vibration treatment. To do this, it is considered some rheological models that, when subjected to vibrations and analysis of their response, lead to the results obtained from different experiments.