Sports requiring players to perform activities such as throwing over a head, force the shoulder joint significant mobility, often reaching the final ranges of movement possible to achieve. In this situation, the lack of coordination and co-operation of all shoulder arch components, starting from the joint joints, ending with the muscular balance, will result in the posture of bending An incorrect movement pattern. A pathological motor pattern, repeatedly reproduced, inevitably leads to the fixation of pathological motor habits, and hence only a step to an injury within the motor system. Currently, a great improvement for the treatment team is the use of modern equipment that allows a comprehensive assessment of damage, as well as the use of it for comprehensive rehabilitation. One of the most interesting ways of medico-rehabilitation treatment is the concept of isokinetic diagnostics and exercise. In connection with the above, the aim of the study was to show the differences between selected parameters of the isokinetic study between the upper and lower dominant trauma dominant, and the non-dominant, among professionally practicing ball players. The conducted research shows that the values of isokinetic parameters are achieved by the dominant trauma factor in the test group were greater than the values achieved by the non-dominant deed, indicates the ability to start compensation and adaptation mechanisms.