The Y-balance test in runners: relationships between performance and running mechanics, and the influence of fatigue

Abstract

The YBT is a widely known clinical movement screen used to measure strength, dynamic stability and neuromuscular control in a variety of athletic and clinical populations. The YBT is also used to predict injury risk across a range of sports. Strength and neuromuscular control of the muscles surrounding the hip are strong predictors of YBT performance. These same variables are also essential for running performance and the prevention of injury. Changes in injury-related running mechanics have been shown to occur along the course of a fatiguing run. Thus, the purpose of this thesis was twofold: 1) to evaluate the relationship between YBT performance and running mechanics and 2) to evaluate whether YBT performance can predict changes in injury-linked running mechanics after a run to fatigue. For the remainder of this paper the previous manuscripts will be referred to as Study 1 (A Multivariate Analysis of the Relationships Between Y-Balance Test Performance and Running Mechanics) and Study 2 (The Relationship Between Y-Balance Test Performance and Running Mechanics at the Hip Following Fatigue).