Campus Units

Kinesiology

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

2-2016

Journal or Book Title

Journal of Applied Biomechanics

Volume

32

Issue

1

First Page

7

Last Page

15

DOI

10.1123/jab.2014-0189

Abstract

Variation in the timing indicators separating sit-to-stand (STS) into movement phases complicates both research comparisons and clinical applications. The purpose of this study was to use kinetic reference standards to identify accurate kinematic and kinetic indicators for STS movement analysis such that consistent indicators might be used for STS from varied initial postures. Healthy adults performed STS using 4 foot placements: foot-neutral, foot-back, right-staggered, and left-staggered. Kinetic and kinematic data were collected from force platforms and an 8-camera video system. Initiation, seat-off, vertical posture, and termination were detected with 5% start and 7.5% end thresholds for changes in kinetic and kinematic STS indicators. Timing differences between kinetic and kinematic indicator time points and the reference vertical seated reaction force end point (seatoff) were determined. Kinematic indicators were compared with selected kinetic indicators using timing differences, statistical similarity, and internal consistency measures. Our results suggest that a single force platform system measuring vertical GRF or a simple camera system to evaluate the shoulder marker position and velocity can accurately and consistently detect STS initiation, seat-off, and vertical posture. In addition, these suggested STS indicators for initiation, seat-off, and vertical posture were not dependent upon foot placement.

Comments

Stevermer CA & Gillette JC. (2016). Kinematic and kinetic indicators of sit-to-stand. Journal of Applied Biomechanics, 32: 7-15. DOI: 10.1123/jab.2014-0189. Posted with permission.

Copyright Owner

Human Kinetics

Language

en

File Format

application/pdf

Published Version

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