Comparison Of Neutral, Wide And Plié Stances On Hip Adduction Kinematics During Squatting

Document Type

Article

Publication Date

5-31-2014

Publication Title

Medicine & Science in Sports & Exercise Supplemental

DOI

10.1249/01.mss.0000496391.38597.71

ISSN

1530-0315

Abstract

Exercising the hip adductor muscle (ADD) in lengthened positions may prevent soccer related injuries because many strains occur when the ADD are in a lengthened position undergoing an eccentric muscle action. Varying stance positions during squatting exercises may be one mode to achieve this goal.

PURPOSE: To compare effects of neutral (NS), wide (WS), and plié (PS) squat stance variations on hip adduction kinematics, squat depth (SD), and repetition time (RT).

METHODS: Twenty collegiate women soccer players performed one set of six repetitions using each stance variation in a randomized order while holding a 4.6 kg dumbbell. The feet were positioned with 1.5x anterior superior iliac spine (ASIS) distance separation during NS, while during WS and PS the feet were positioned with 3x ASIS distance separation. The PS also involved maximal (self-selected) external leg rotation. Prior to data collection, subjects practiced squatting with an upright trunk position while attempting to reach a SD with the thighs horizontal. Kinematic data were collected using an electromagnetic motion analysis system (Motion Monitor, IST, Inc.) from which hip adduction, RT and SD were computed.

RESULTS: While there was no significant differences in RT (P=.889), SD was significantly greater for the WS compared to NS (95% CIdiff:.014-.040m, P<.001) and PS (95% CIdiff:.012-.040m, P<.001). Peak abduction was attained at maximal SD for all three variations. PS peak abduction was significantly greater compared to NS (95% CIdiff:30.2-38.3°) and WS (95% CIdiff:11.2-17.5°). Additionally WS peak abduction was significantly greater than NS (95% CIdiff:15.2-24.5°). PS adduction-abduction range of motion was significantly greater compared to NS (95% CIdiff:8.1-20.9°) and WS (95% CIdiff:4.7-13.1°). Additionally, WS was significantly greater than NS (95% CIdiff:0.2-11.0°).

CONCLUSION: Compared to NS, WS and PS squats promoted both greater hip abduction range of motion and peak abduction. The addition of adopting a plié stance increased both hip abduction measures despite a significantly less SD suggesting PS may be best suited to prompting greater eccentric stress on the ADD compared to NS and WS. Further research directly considering ADD eccentric stress to verify this interpretation is needed.

Comments

© 2014 American College of Sports Medicine

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