Lower extremity variability changes with drop-landing height manipulations. Academic Article

abstract

• Landing is a common lower extremity injury mechanism in sport, with potential connections to movement control accessed through variability measures. We investigated intra-subject lower extremity variability changes following drop-landing height manipulations using standard deviation (SD) and coefficient of variation (CV) among lower extremity peak sagittal joint angles and moments. Fourteen healthy participants completed five drop-landing trials from five heights 20%, 60%, 100%, 140% and 180% maximum vertical jump height (MVJH). Peak joint angles and moments increased with greater landing height (p<0.001), highlighting inter-joint differences (Flexion: Knee > Hip > Ankle, p<0.001; Extensor Moment: Hip > Knee > Ankle, in excess of 60% MVJH, p<0.05). Kinematic and kinetic SD increased with variable magnitudes, while CV decreased at greater landing heights (p0.016). Decreased relative variability under greater task demands may underscore non-contact injury mechanisms from repetitive loading of identical structures.

authors

• Nordin, Andrew

published proceedings

• Res Sports Med

author list (cited authors)

• Nordin, A. D., & Dufek, J. S.

citation count

• 12

complete list of authors

• Nordin, Andrew D||Dufek, Janet S

publication date

• April 2017

publisher

• Taylor & Francis  Publisher

published in

• n1543-8627ISSN  Journal

keywords

• Adult
• Analysis Of Variance
• Ankle Joint
• Biomechanical Phenomena
• Female
• Hip Joint
• Humans
• Intra-subject
• Joint Angle
• Joint Moment
• Kinetics
• Knee Joint
• Lower Extremity
• Male
• Movement
• Sagittal
• Young Adult

PubMed Central ID

• 28105865

Digital Object Identifier (DOI)

• 10.1080/15438627.2017.1282353

start page

• 144

end page

• 155

volume

• 25

issue

• 2

URL

• http://dx.doi.org/10.1080/15438627.2017.1282353