Sports in general requires knowledge and the following of established rules, learning specific psychomotor skills, concentration and attention to the movements, regular training, discipline and
dedication. In the case of adolescent athletes this particular period of development might cause changes in several physical and cognitive aspects affecting the sport performance. When it comes to a
sport like volleyball that requires mainly cooperation, concentration and quick decision making, these attributes may induce the outcome of a competition. Competitive anxiety and deficiencies to
control the emotions has been considered by sports psychology experts as important psychological aspects in sport. The objective of this research was to evaluate the levels of competitive anxiety and
mood alterations over a regular season of adolescent volleyball players compared to the characteristics of parental style, physical height and sport experience.
It is a longitudinal and quantitative study. The sample was formed by 13 athletes, evaluated over four stages during a regular season. Instruments: Competitive State Anxiety Inventory 2R (CSAI-2R),
Brunel’s mood scale (BRUMS). The study was approved by the Research Ethics Committee of the Federal University of São Paulo (664.979/14).
The group obtained higher scores in competitive anxiety and mood in the initial stage "away from home”. However, lower scores were reached in the third stage, semi-final "at home", after a good
performance during the previous stage. The principal discovery was the difference between the tension initially and the other stages, which were related to the parental behavior and changes according
to the sport experience, the physical height and the specific volleyball function.
The importance of parental styles was noted in the sporting development of adolescents, together with the impact of the competitive environment in cognitive aspects and emotional reactions of young
athletes. It also indicates the importance of having a sport psychologist in every sport team.