The Relationship Between Functional Movement Screening Scores and Neuromuscular Asymmetry Performance in Football Players: A Cross-Sectional Study

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Abstract
This study investigates the effect of Functional Movement Screening (FMS) components on neuromuscular asymmetry performance in football players. A total of 44 male football players (mean age: 22.93±2.69 years; height: 1.77±0.03 m; body mass: 75.29±2.38 kg; sports experience: 9.84±1.71 years) participated. The study was conducted over two sessions, 48 hours apart. In the first session, anthropometric measurements and FMS tests were performed. In the second session, dominant, non-dominant, and bilateral countermovement jump (CMJ) tests were applied to determine neuromuscular asymmetry levels. Statistical analyses were conducted using JASP 0.18 software. The relationship between FMS scores and neuromuscular asymmetry was evaluated using Pearson's correlation coefficient, while linear regression determined the effect size. A significant negative correlation was found between neuromuscular asymmetry and FMS components, including deep squat (r=-0.548), hurdle step (r=-0.639), inline lunge (r=-0.429), active leg raise (r=-0.373), and total FMS score (r=-0.507) (p<0.05). Neuromuscular asymmetry also negatively impacted FMS scores (p<0.05). A one-unit increase in neuromuscular asymmetry significantly reduced deep squat (-0.02), hurdle step (-0.04), inline lunge (-0.03), active leg raises (-0.02), and total FMS scores (-0.09) (p<0.05). In conclusion, the study identified a negative relationship between FMS scores and neuromuscular asymmetry levels in football players, indicating that movement quality influences neuromuscular asymmetry. Both FMS and neuromuscular asymmetry play critical roles in athletic performance and injury prevention among athletes.

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