<![CDATA[This study aims to examine the effect of self-confidence on the peak performance of futsal athletes in the Division 1 AFK Club of Semarang City in 2024. This research employs a quantitative method. The sample consisted of 54 male futsal athletes aged 18–20 years from the Division 1 AFK Club of Semarang City. The research instruments included a self-confidence questionnaire comprising 13 items and a peak performance questionnaire comprising 35 items. The validity test results showed a coefficient of 0.945 for the self-confidence instrument and 0.947 for the peak performance instrument. Data were collected using self-confidence and peak performance questionnaires distributed via Google Forms. Data analysis techniques included normality test, linearity test, correlation test, and simple linear regression analysis, assisted by the Statistical Program for Social Sciences (SPSS) version 25 with a significance level (p-value) of < 0.05. The results of the study revealed a significance value of 0.000 < 0.05 and a correlation coefficient of 0.604. These findings indicate that self-confidence has a significant effect on the peak performance of Division 1 futsal athletes in the AFK Club of Semarang City]]>
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