Ankle dorsiflexion displacement during landing is associated with initial contact kinematics but not joint displacement

Document Type

Article

Publication Date

8-1-2015

Abstract

The ankle, knee, and hip joints work together in the sagittal plane to absorb landing forces. Reduced sagittal plane motion at the ankle may alter landing strategies at the knee and hip, potentially increasing injury risk; however, no studies have examined the kinematic relationships between the joints during jump landings. Healthy adults (N = 30; 15 male, 15 female) performed jump landings onto a force plate while three-dimensional kinematic data were collected. Joint displacement values were calculated during the loading phase as the difference between peak and initial contact angles. No relationship existed between ankle dorsiflexion displacement during landing and three-dimensional knee and hip displacements. However, less ankle dorsiflexion displacement was associated with landing at initial ground contact with larger hip flexion, hip internal rotation, knee flexion, knee varus, and smaller plantar flexion angles. Findings of the current study suggest that restrictions in ankle motion during landing may contribute to contacting the ground in a more flexed position but continuing through little additional motion to absorb the landing. Transverse plane hip and frontal plane knee positioning may also occur, which are known to increase the risk of lower extremity injury.

Publication Title

Journal of Applied Biomechanics

Volume

31

Issue

4

First Page

205

Last Page

210

Digital Object Identifier (DOI)

10.1123/jab.2013-0233

PubMed ID

25734492

ISSN

10658483

E-ISSN

15432688

Link to Full Text

Share

COinS