Effect Of Fifa11+ Program On Lower Limb Injury Risk Of College Female Soccer Players

PURPOSE:To examine the efficacy of 10-week FIFA11+ program on the risk of lower limb injury in college female soccer players from the perspective of kinematics. METHODS: Thirty-four college female soccer players from Shanghai Tongji Port Soccer team were randomly divided into intervention group (n = 17) and control group (n = 17). The intervention group performed FIFA11+ program (20-22 min, 3 times per week) for 10 weeks, while the control group performed routine warm-ups with the same time and frequency. The LESS test, flexion Angle and valgus Angle at the moment of touchdown and maximum knee flexion, and Y balance test were used as observation indicators. High-speed cameras captured frontal and sagittal plane views of the subject performing the jump-landing-rebound task. Kinovea software was used to assist in the analysis of the LESS score and the joint Angle of the subjects. Data were analyzed using SPSS27.0 software. RESULTS: After the intervention, the LESS score of the intervention group was significantly reduced compared to the control group (4.059 ± 1.31vs5.47 ± 1.61, p < 0.05). The knee flexion Angle at touchdown increased (25.05 ± 7.86vs29.94 ± 8.43,p < 0.05) and the valgus Angle at the moment of maximum knee flexion decreased (16.28 ± 6.37vs 9.94 ± 5.58, p < 0.01) in the intervention group. There were no significant changes in the control group (25.88 ± 6.75vs26.59 ± 6.85, p > 0.05; 15.23 ± 6.083vs14.41 ± 5.236, p > 0.05). The valgus Angle at maximum knee flexion in the intervention group was significantly lower compared to the control group (9.94 ± 5.58vs14.41 ± 5.236,p < 0.05).The comprehensive scores of the dominant and non-dominant legs of the Y Balance Test in the intervention group were significantly higher than those in the control group (1.085 ± 0.075vs1.078 ± 0.031, p < 0.01; 1.071 ± 0.062vs1.078 ± 0.031, p < 0.01). CONCLUSIONS:Ten weeks FIFA11+ program can significantly improve college female soccer players' jump-landing technique, correct inadequate knee flexion and neuromuscular deficiencies in knee valgus during landing, enhance dynamic balance, and thereby reduce the risk of lower limb injuries in female college soccer players.