Background: Adolescent's perfectionism primarily has related to stress symptoms. Relationship between aspects of perfectionism and sport performance in no-stress training accompanied with inconsistent results. Objective: Purpose of the present study was to investigate how different aspects of perfectionism predict futsal skill performances during stressful training in adolescent. Methods: Participants were 101 adolescent futsal players. They completed perfectionism inventory, then performed a futsal skill during three blocks of four trials. Two indices took into account: time and performance. Results: There was a significant relationship between positive perfectionism and performance during blocks 1 and 3, when negative perfectionism was considered. A significant positive relationship between negative perfectionism with both time and performance during block 3 was observed. Also, a significant positive correlation in terms of interaction between high positive and high negative perfectionism with the performance in during block 3 found. Conclusion: The findings suggest that positive perfectionism in athletes during training was correlated with high levels of performance, but when crossing blocks, that relationship removed. Also, after observing other's performance, performance in people high negative perfectionism during consecutive trials improved. When interaction between positive and negative perfectionism was considered to predict sport performance, performance in people high positive perfectionism during stressful training impaired.
