1. BIOLOGICAL CHANGES OF STRENGTH AND SPEED IN RUGBY DEPENDING ON TRAINING PROGRAM. Authors: POP SERGIU, CHIHAIA OCTAVIAN.2. FORCE DEVELOPMENT AND SPEED ACCORDING TO SCHEDULE ANNUAL TRAINING PLAN OF A TEAM PERFORMANCE – RUGBY. Authors: POP SERGIU, CHIHAIA OCTAVIAN.3. MEASURES TO PREVENT INJURIES IN THE PERFORMANCE RUGBY. Authors: CHIHAIA OCTAVIAN, POP SERGIU.