Performance do y-balance test em corredoras amadoras, como e sem valgo dinâmico, antes e após a fadiga muscular do tronco

Abstract

Amateur running has become increasingly popular, but this rise in participation is also accompanied by a high incidence of injuries, particularly in the lower limbs. Considering that dynamic knee alignment, such as dynamic valgus, is frequently associated with musculoskeletal injuries, this study aimed to evaluate its impact on the performance of the Y-Balance Test (YBT) in amateur female runners, both before and after trunk muscle fatigue. Amateur runners were divided into two groups: those with dynamic valgus (VDJ) and those without dynamic valgus (NVDJ). The study assessed anthropometric characteristics, lower limb strength, trunk strength and endurance, and YBT performance in the anterior, medial, and posterolateral directions. The results did not reveal significant differences between the groups regarding anthropometric characteristics (except for weight), running practice, and muscle strength. Likewise, YBT performance did not vary significantly between groups before and after trunk muscle fatigue. This study found no evidence that knee dynamic valgus and trunk muscle fatigue significantly impact YBT performance in amateur female runners. However, the results suggest that neuromuscular control may be a relevant factor and provide a basis for future investigations, highlighting the importance of considering multiple factors when assessing functional performance and injury prevention in runners.