The research aims to identify the effectiveness of self-talk as a strategy on self-confidence and the psychological hesitation of back-crawling swimming. The researcher used the experimental method using two groups, one experimental and the other control by means of pre and post measurement. The research sample was deliberately chosen from students of the second year. The researcher concluded that self-talk as a strategy positively affects self-confidence, reduces psychological frequency, and improves the performance of swimming crawling on the back. The researcher recommends the necessity of implementing the proposed self-talk strategy program due to its positive and effective contribution to developing self-confidence, reducing psychological hesitation, and improving the performance level of back crawl swimming skill.