Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/13705
Title: Ankle and knee flexibility and strength predict dynamic postural stability during single-leg jump landings
Authors: Williams, VJ
Nagai, T
Sell, TC
Abt, JP
Rowe, RS
McGrail, MA
Lephart, SM
Keywords: Musculoskeletal;Army
Issue Date: 2016
Publisher: Human Kinetics
Citation: Journal of Sport Rehabilitation, 25 (3): pp. 266 - 272,(2016)
Abstract: Dynamic postural stability is important for injury prevention, but little is known about how lower-extremity musculoskeletal characteristics (range of motion [ROM] and strength) contribute to dynamic postural stability. Knowing which modifiable physical characteristics predict dynamic postural stability can help direct rehabilitation and injury-prevention programs. Objective: To determine if trunk, hip, knee, and ankle flexibility and strength variables are significant predictors of dynamic postural stability during single-leg jump landings. Design: Cross-sectional study. Setting: Laboratory. Participants: 94 male soldiers (age 28.2 ± 6.2 y, height 176.5 ± 2.6 cm, weight 83.7 ± 26.0 kg). Intervention: None. Main Outcome Measures: Ankle-dorsiflexion and plantar-flexion ROM were assessed with a goniometer. Trunk, hip, knee, and ankle strength were assessed with an isokinetic dynamometer or handheld dynamometer. The Dynamic Postural Stability Index (DPSI) was used to quantify postural stability. Simple linear and backward stepwise-regression analyses were used to identify which physical characteristic variables were significant predictors of DPSI. Results: Simple linear-regression analysis revealed that individually, no variables were significant predictors of the DPSI. Stepwise backward-regression analysis revealed that ankle-dorsiflexion flexibility, ankle-inversion and -eversion strength, and knee-flexion and -extension strength were significant predictors of the DPSI (R2 = .19, P = .0016, adjusted R2 = .15). Conclusion: Ankle-dorsiflexion ROM, ankle-inversion and -eversion strength, and knee-flexion and -extension strength were identified as significant predictors of dynamic postural stability, explaining a small amount of the variance in the DPSI.
URI: http://bura.brunel.ac.uk/handle/2438/13705
DOI: http://dx.doi.org/10.1123/jsr.2015-0001
ISSN: 1543-3072
Appears in Collections:Dept of Life Sciences Research Papers

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