The investigator will determine the effectiveness of psychological skill training on quantitative EEG in athletes before the competition.

Psychological skills training is the mental training that can apply for increased athletes' performance to make athletes more confident. The objective of psychological skill training is to develop the potential of athletes to be able to show their abilities (Peak Performance), and to create satisfaction, self-esteem, for athletes. Additionally, the ability to concentrate and reduce anxiety could affect athletes' emotions and be ready to participate in the competition. Therefore, this study will apply psychological skills training for athletes. The effectiveness of psychological skill training will be measured by using quantitative EEG before and after training. The quantitative EEG assessments could demonstrate an anxiety level at different stages of the competition and it could reveal the changes caused by training. The intervention will begin 3 months before the competition. The quantitative EEG measurements are arranged 4-5 times following the previous study. The sequence of the measurement will be including a baseline: one month before the competition, two weeks before the competition, a week before the match, three days before the match (depend on the situation), three days after the match (post-training).

Inclusion Criteria:

• Athletes male or female
• Age between 18-35

Exclusion Criteria:

• Having an acute injury to the musculoskeletal structures of other joints of the lower extremity in the previous 3 months