Abstract
The one-handed overhead throwing is one of the skills that are phylogenetic ally very old. Kinematic analysis of throws point to a certain similarity in their execution.
The aim of this paper is to show the intra-individual differences in involvement of selected muscles during the performance of different types of one-handed overhead throwing. It is a case study based on intra-individual description using electromyographic analysis.
Reference person was twenty-two man, playing extra league in baseball. The basic method of describe was analysis graphs of the electric potential, which was sensed by EMG apparatus "ME 6000".
Surface electromyography shows the differences in the electrical activity of the muscles of the shoulder girdle, not just in phases of throw that precede the power phase of the throw, but also during the actual swing of arms during and after drop the ball. In practice, it is useful to know the differences in the performance of different types of throws to avoid unnecessary overloading of the shoulder joint of players in training.
For specific person it can be recommended to not to use certain types of throws in practice, to avoid disruption technique of baseball pitches.