THE EFFECTS OF INJURY PREVENTION WARM-UP PROGRAMMES ON KNEE STRENGTH IN MALE SOCCER PLAYERS

摘要

The study investigates the effects of the 11+ and HarmoKnee injury prevention programmes on knee strength in male soccer players. Under-21 -year-old players (n=36) were divided equally into: the 11+, HarmoKnee and control groups. The programmes were performed for 24 sessions (20-25 min each). The hamstrings and quadriceps strength were measured bilaterally at 60°-s" 180°-s1 and 300°s"1. The concentric quadriceps peak torque (PT) of the 11+ increased by 27.7% at 300°-s~1 in the dominant leg (p<0.05). The concentric quadriceps PT of HarmoKnee increased by 36.6%, 36.2% and 28% in the dominant leg, and by 31.3%, 31.7% and 20.05% at 60°-s"1,180°-s"1 and300°-s"1 in the non-dominant leg respectively. In the 11 + group the concentric hamstring PT increased by 22%, 21.4% and 22.1% at 60°-s"1,180°-s~1 and 300°-s"1, respectively in the dominant leg, and by 22.3%, and 15.7% at 60°s"1 and 180°-s" in the non-dominant leg. In the HarmoKnee group the hamstrings in the dominant leg showed an increase in PT by 32.5%, 31.3% and 14.3% at 60°-s" 180°s"1 and 300°-s"1, and in the non-dominant leg hamstrings PT increased by 21.1% and 19.3% at 60°-s"1 and 180°-s"1 respectively. The concentric hamstrings strength was significantly different between the 11 + and control groups in the dominant (p=0.01) and non-dominant legs (p=0.02). The HarmoKnee programme enhanced the concentric strength of quadriceps. The 11 + and HarmoKnee programmes are useful warm-up protocols for improving concentric hamstring strength in young professional male soccer players. The 11 + programme is more advantageous for its greater concentric hamstring strength improvement compared to the HarmoKnee programme.