In this study, balance studies and PNF stretching studies were performed on bosu ball for 8 weeks and their effects on the development of dollyo chagi technique were examined. A total of 40 elite six-year-old taekwondo students, including 14 women and 26 men, participated in the study as volunteers. 40 athletes were randomly divided into two groups: a control and an experimental group, and a balanced training program with a bosu ball were applied to the experimental group with a PNF stretching training program for 8 weeks. 1th. Flexibility, balance, and dollyo chagi technique of athletes at 3 separate times by taking the pre-test, dec-test, and final test. (the level of its head area), 2nd. (10 cm above their level) and 3rd. strokes to the levels (20 cm above their level) were measured. The SPSS 22.0 program was used to analyze the data obtained from this study. The findings from the research are examined to test their level when Dec in men (p<0.05), level test upper Dec 10 cm (p<0.01) and the Dec Test level up to 20 cm (p<0.001) statistically significant results were obtained. In women, significant findings were found at the level of the preliminary test itself (p<0.05) and at the level of the preliminary test 10 cm higher (p<0.001). In addition, statistically significant results were found at 3 levels of the dollyo chagi technique in the variables of the final test self-level, 10 cm up a level and 20 cm up a level in both women and men. When these findings are evaluated, it can be said that 8-week bosu ball balance exercises and PNF stretching exercises in women and men have a healing effect on dollyo chagi technique.