مسار (E. M. G)‎ بعض العضلات العاملة لمرحلتي الاستناد والدفع في الضرب الساحق لدى لاعبي الكرة الطائرة

Abstract EN

The aim of the researchers in studying the stages of impact and impuls to know the extent of the differences in the activity of the muscles studied between the two stages and which of them is the rate of increased activity is the largest or may be the smallest because it may give us another indication of the role of these muscles when implementing the stages of the skill performance of spike in volleyball players, and use the researchers described the descriptive approach for the purposes of analyzing the results.

the research sample consisted of (6) spike specializing in volleyball from the police and industry clubs season (2018-2019), and the EMG device was used (7) electrodes and its accessories with Japanese (SONY) imaging camera to create a velocity of (25) p / sec, a leather tape measure of length (5) meters and (1.5) meters, (3) volleyball balls, and a legal volleyball field, and I determined the reference and push stages to measure the muscular activity of the muscles studied from the right side, and they concluded that the muscle activity in relation to for the crushing knocking skill in volleyball at the first appearance of thrust, the muscles of the trunk start, then the hip and finally the legs.

the activity value at this stage is for the front femoral muscles greater than the posterior muscles