The aim of the study is to evaluate the effects of High Intensity Functional Training (HIFT) program on aerobic capacity, metabolic adaptation and neuromuscular responses in young female volleyball players. 22 licensed female athletes (16.41±1.29 years old) who played volleyball actively for at least two years in the regional women's volleyball league voluntarily participated in the study. Participants were divided into two groups as experimental (EG; n=11) and control group (CG; n=11) by random sampling method. CG only participated in routine volleyball training for 12 weeks. CG only participated in routine volleyball training for 12 weeks. In addition to volleyball training, EG participated in the 12-week HIFT program, which included sprinting, plyometric, functional body weight, resistance and aerobic exercises two days in a week. Measurements were taken before and after the training program as pre-test and post-test