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J Sport Rehabil. 2018 Sep 1;27(5):445-450. doi: 10.1123/jsr.2016-0187. Epub 2018 Jul 20.

The Relationship Between Hip Strength and the Y Balance Test.

Abstract

CONTEXT:

The Y Balance Test was developed as a test of dynamic postural control and has been shown to be predictive of lower-extremity injury. However, the relationship between hip strength and performance on the Y Balance Test has not been fully elucidated.

OBJECTIVE:

The goal of this study was to identify the relationship between components of isometric hip strength and the Y Balance Test, to provide clinicians better guidance as to specific areas of muscle performance to address in the event of poor performance on the Y Balance Test.

DESIGN:

Laboratory study.

SETTING:

Biomechanics laboratory.

PARTICIPANTS:

A total of 73 healthy participants (40 males and 33 females) volunteered for this study.

INTERVENTION:

None.

MAIN OUTCOME MEASURES:

Participants completed the Y Balance Test on the right leg. The authors then measured peak isometric torque in hip external rotation, abduction, and extension. Correlations were calculated between torque measurements, normalized for mass and Y Balance Test performance. Significant relationships were used in linear regression models to determine which variables were predictive of the Y Balance Test performance.

RESULTS:

The authors found significant positive correlations between Y Balance Test performance and hip abduction strength. They also found correlations between the Y Balance Test and hip extension and external rotation strengths. Linear regression analysis showed hip abduction to be the only significant predictor of Y Balance performance.

CONCLUSIONS:

The authors found the strongest association between the Y Balance Test and hip abduction strength. They also showed smaller but significant associations with hip extension and external rotation strength. When entered into a linear regression analysis, hip abduction strength was the only significant predictor of Y Balance performance. Using this information, practitioners should look to hip abduction strength when patients exhibit deficits in the Y Balance Test.

KEYWORDS:

injury prevention; neuromuscular control; postural stability

PMID:
28714790
DOI:
10.1123/jsr.2016-0187
[Indexed for MEDLINE]

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