Background

A better understanding about the relationship between trunk and hip muscles strength and core stability may improve evaluation and interventions proposed to improve core stability.

Objectives

To investigate if trunk and hip muscles strength predict pelvic posterior rotation during the bridge test with unilateral knee extension.

Methods

This is a cross-sectional study. Sixty-one healthy individuals of both sexes (age, 28 ± 6.4 years, weight, 66.5 ± 10.9 kg, height, 167 ± 9.5 cm) performed the bridge test with unilateral knee extension. The pelvic posterior rotation during the bridge test was obtained with two-dimensional video analysis. Isometric strength of the trunk extensors and rotators, and hip abductors, external and internal rotators and extensors were measured with a hand-held dynamometer. Multiple linear regression analysis was performed to identify if the strength variables could explain the pelvic posterior rotation during the test.

Results

Muscle strength predicted pelvic posterior rotation during the bridge test (r = 0.54; p = 0.003). Strength of the trunk rotators (p = 0.045) and hip internal rotators (p = 0.015) predicted reduced magnitude of pelvic posterior rotation during the bridge test, and strength of the hip extensors (p = 0.003) predicted increased magnitude of pelvic posterior rotation.

Conclusions

Trunk rotators and hip internal rotators and extensors strength predict 29% of the performance during the bridge test with unilateral knee extension. The strength of these muscles should be evaluated in individuals with increased pelvic posterior rotation during the bridge test with unilateral knee extension.

中文翻译：

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躯干和臀部肌肉力量是否可以预测核心稳定性测试期间的表现？

背景

更好地了解躯干和臀部肌肉力量与核心稳定性之间的关系可以改善评估和干预措施，以提高核心稳定性。

目标

调查单侧膝关节伸展桥测试期间躯干和臀部肌肉力量是否预测骨盆后旋。

方法

这是一项横断面研究。61 名健康男女（年龄，28±6.4 岁，体重，66.5±10.9 kg，身高，167±9.5 cm）进行单侧膝关节伸展桥试验。通过二维视频分析获得桥测试期间的骨盆后旋情况。使用手持测力计测量躯干伸肌和旋转肌、髋关节外展肌、外旋肌、内旋肌和伸肌的等长肌力。进行多元线性回归分析以确定强度变量是否可以解释测试期间的骨盆后旋。

结果

桥测试期间肌肉力量预测骨盆后旋（r  = 0.54；p  = 0.003）。躯干旋转肌的力量 ( p  = 0.045) 和髋部内旋肌 ( p  = 0.015) 预测桥测试期间骨盆后旋幅度的减小，髋部伸肌的力量 ( p  = 0.003) 预测骨盆后旋幅度的增大。

结论

躯干旋转肌、髋内旋肌和伸肌肌力可预测单侧膝关节伸展桥测试中 29% 的表现。应在单侧膝关节伸展桥测试期间对骨盆后旋增加的个体评估这些肌肉的力量。