Age-Related Differences in Functional Hamstring/Quadriceps Ratio Following Soccer Exercise in Female Youth Players: An Injury Risk Factor

作者：Croix Mark De Ste^*; Priestley Abigail; Lloyd Rhodri; Oliver Jon

来源：Pediatric Exercise Science, 2018, 30(3): 376-382.

DOI：10.1123/pes.2017-0034

• muscular control
• fatigue
• maturation
• magnitude-based inferences

Purpose: Fatigue negatively alters dynamic knee control, and the functional hamstring/quadriceps ratio (H/Q(FUNC)) plays an important role in stabilizing the joint. The aim of this study was to investigate the influence of soccer-specific exercise on H/Q(FUNC) in under (U) 13-, U15-, and U 17-year-old female soccer players. Methods: A total of 36 female players performed concentric and eccentric actions of the hamstrings at 60 degrees, 120 degrees, and 180 degrees/s before and after an age group-specific field-based soccer protocol. H/Q(FUNC) was determined in the first 30 degrees of knee flexion. Results: Significant angle x velocity (P = .001) and time x angle (P = .033) interaction effects were found indicating a lower H/Q(FUNC) with increased movement velocity at 0 degrees-10 degrees as opposed to greater knee flexion angles. Fatigue-related effects were only evident near full knee extension. Probabilistic inferences indicated that changes in H/Q(FUNC) were generally unclear in U13s, likely detrimental in U15s, and very likely beneficial in U17s. Conclusions: Altered muscular control following soccer-specific exercise is age dependent with players' 1-year post-peak height velocity at greatest risk of injury. Injury prevention and screening need to be age and maturation appropriate, should consider the effects of fatigue, and include movements near full extension.

• 出版日期2018-8