FUNCTIONAL ASYMMETRY OF EMG ACTIVITY AND DYNAMIC FEATURES IN ELITE WEIGHTLIFTERS WHEN PERFORMING THE COMPETITIVE SNATCH
The relevant issue of biomechanics and sports physiology, as well as sports medicine, in the aspect of injury prevention, is to identify the asymmetry of sports movements. The aim of the study was to identify functional motor asymmetry manifested in the power and electromyography parameters of the leading muscles when performing the competitive snatch by elite male and female weightlifters. In the study, using the developed methodology for biomechanical and electromyographic evaluation of weightlifting exercises, the functional asymmetry of electromyographic activity and dynamic characteristics in male and female weightlifters during the performance of the snatch were determined. The research results revealed small right-sided functional asymmetry of the vertical component of the efforts, made on the support by the foot, both in male and female weightlifters. The asymmetry of the average electromyography amplitude of the muscles was insignificant and had the following features: left-sided asymmetry for the trapezius muscle and right-sided asymmetry for the leg muscles (quadriceps femoris, biceps femoris, and gastrocnemius). The greatest manifestations of asymmetry were revealed in the snatch phase, which, apparently, is associated with the partially unsupported position of the body. According to electromyographic activity, dominance of the right leg was revealed in all weightlifters. The symmetrical performance of the exercise testifies to the good technical fitness of the studied elite weightlifters and appropriate muscle balance.