Inclusion Criteria:  - be between the ages of 12 and 16, enrolled in a similar training program and agree to participate in the study  Exclusion Criteria:  Having any surgery / serious pathology of the spinal column, Have had a lower / upper extremity injury in the last 3 months, Sports age is less than 5 years, Severe orthopedic / systemic discomfort during training, Absence from training for more than 3 sessions Family disapproval or reluctance to study Minimal Q-DASH score (0-25)