Jaszczur-Nowicki J. Physical performance of quality athletes as the factor of sport skill in the sports with outward variation conditions of contents (on windsurfing materials).

Evaluation of the components of special preparedness for windsurfing and influence of alternative conditions of competition holding upon the performance of qualified yachtsmen has been a basis for a special analysis. Basing on the conducted analysis, the principles of special physical preparation for the sports events, that have altering conditions of competition holding, have been developed. There have been considered and generalized the data which make it possible to improve the system of special physical preparation of qualified windsurfers and athletes in the kinds of sport with alternative conditions of competition holding. The grounds for their practical application have been cited. The analysis on the structure of physical preparedness of qualified Polish yachtsmen, evaluated through the level of major physical qualities' development and evaluation of their manifestation under special performance of yachtsmen has served as a specific element of the analysis. Those data have underlay beneath the working-out and practical application of the program on development of special physical preparedness in yachting. The conceptual conclusions formulated in the work lead to the necessity to take into consideration alternative conditions of competition activity. In this connection the expediency for substantiation of the specific approach to the improvement of special physical preparation based on the increase of effectiveness and degree of relationship between the components of managing the training process and consideration of regularities in the course of the body's adaptive processes within a year cycle of preparation is verified.