Allied Health and Human Performance, University of South Australia, Australia; Alliance for Research in Exercise, Nutrition, and Activity (ARENA), University of South Australia, Australia.
Allied Health and Human Performance, University of South Australia, Australia; Alliance for Research in Exercise, Nutrition, and Activity (ARENA), University of South Australia, Australia.
J Sci Med Sport. 2022 Apr;25(4):306-311. doi: 10.1016/j.jsams.2021.10.014. Epub 2021 Nov 3.
Identify how modified Lower-Quarter Y-Balance Test (mYBT-LQ) and Upper-Quarter Balance Test (mYBT-UQ) scores relate to injury risk and measures of physical performance in elite adolescent Australian Football (AF) athletes.
Prospective cohort study.
Pre-season mYBT-LQ, mYBT-UQ, and physical performance measures (speed, jump height, and agility) were obtained in 257 elite adolescent male AF athletes. Injury status was tracked across the 18-game season to determine the relationship between mYBT scores and injury risk based on time-to-event analysis. Cross-sectional analysis of mYBT-LQ scores and performance measures determined the relationships between these variables.
There were no significant associations between injury risk and any single mYBT parameter. However, athletes with high posteromedial asymmetry and good agility performance (top 25% of the cohort) had moderately increased injury risk with and tended to without a previous injury history (Hazard Ratio = 3.26 [95% Confidence Interval: 1.01, 10.54; p = 0.048] and 2.69 [95% Confidence Interval = 0.92, 7.82; p = 0.069], respectively). There were significant correlations between faster agility times and higher composite limb-length normalised mYBT-LQ (r = -0.210; CI = -0.324, -0.090), limb-length normalised average posteromedial reach score (r = -0.227; CI = -0.340, -0.108), and limb-length normalised average posterolateral reach score (r = -0.250: CI = -0.361, -0.132).
In isolation, the mYBT is not useful for identifying injury risk in junior AF athletes, and only small correlations between mYBT-LQ and physical performance variables were identified. However, high mYBT-LQ posteromedial asymmetry is associated with increased injury risk for athletes with good agility performance. This should be considered within athlete preparation programs.
确定改良下四分距 Y 平衡测试（mYBT-LQ）和改良上四分距 Y 平衡测试（mYBT-UQ）评分与澳大利亚足球（AF）精英青少年运动员的受伤风险和身体表现测量指标之间的关系。
前瞻性队列研究。
在 257 名精英青少年男性 AF 运动员中，在赛季前获得 mYBT-LQ、mYBT-UQ 和身体表现测量（速度、跳跃高度和敏捷性）。通过时间事件分析确定 mYBT 评分与受伤风险之间的关系，以跟踪整个 18 场比赛赛季的受伤情况。mYBT-LQ 评分与表现测量指标的横截面分析确定了这些变量之间的关系。
受伤风险与任何单一 mYBT 参数之间均无显著关联。然而，具有高后内侧不对称性和良好敏捷性表现（队列前 25%）的运动员受伤风险适度增加，且倾向于无既往受伤史（危险比=3.26[95%置信区间：1.01，10.54;p=0.048]和 2.69[95%置信区间：0.92，7.82;p=0.069]）。更快的敏捷性时间与更高的综合肢体长度归一化 mYBT-LQ（r=-0.210;CI=-0.324，-0.090）、肢体长度归一化平均后内侧到达评分（r=-0.227;CI=-0.340，-0.108）和肢体长度归一化平均后外侧到达评分（r=-0.250：CI=-0.361，-0.132）之间存在显著相关性。
孤立地看，mYBT 对识别青少年 AF 运动员的受伤风险并不有用，并且仅确定了 mYBT-LQ 与身体表现变量之间的小相关性。然而，高 mYBT-LQ 后内侧不对称性与具有良好敏捷性表现的运动员受伤风险增加有关。这应在运动员准备计划中考虑。
