![]() Mean values of EMG signal in a selected time interval show greater More advanced in training, and in both groups in the dominant hand. Key words: Motor coordination capacities, electromyography (EMG), sports level, muscle bioelectrical activity level, arm muscles Variability among the more advanced players. Muscle activation patterns of the dominant and non-dominant arm were compared during two unconstrained throwing tasks (dart throws, underhand throws). Electromyographic (EMG) signals were recorded from shoulder (anterior and posterior deltoid), upper arm (biceps and triceps brachii) and hand (thenar) muscles in 12 healthy volunteers. Mean and peak EMG amplitudes of both arms did not differ significantly and their EMG curves were nearly congruent. Also the timing of the EMG bursts was alike for the dominant and non-dominant arm in both throwing tasks, with the exception of one muscle (posterior deltoid). EMG activity of this muscle, which is an antagonist during dart and underhand throws, started significantly later on the non-dominant side than on the dominant side. The mean interlimb differences were 17 ms for dart throws and 35 ms for underhand throws. ![]() Higher spatial accuracy of throws was associated with less hand (thenar) muscle activity regardless of the side (dominant, non-dominant). The conspicuous similarity of the EMG curves of both arms speaks in favour of motor equivalence, indicating that the activation of dominant and non-dominant agonist muscles is controlled by the same motor program during unconstrained throwing.īasketball as a team sport requires the highest level of coordinative abilities because it is essential for a player to achieve the mastery of basketball skills. A high level of coordinative motor abilities makes a basketball player learn various motor skills much faster and more rationally, enrich his motor experience on a constant basis and feel joy and satisfaction from the play. Therefore, coordinative abilities ought to be developed in lower secondary school students and we need to diagnose their levels of these abilities in order to enable supplementary recruitment into youth groups who undergo sports training.
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