ABSTRACT
Soccer is a branch of sport with a profile of complex requirements. Because of the variety of factors affecting motor and mental abilities, as well as the effects of the opposing and supporting players on behaviour during play, it is difficult to recognize and rank the impact of single, interfering components within the whole. Such judgement, however, is of major practical interest, because by these means many important disclosures for the planning and practice of training can be made, and at the same time a reliable basis is provided for a valid performance diagnosis and prognosis (Fig. 1).
