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- Title
Kinematic and Kinetic Indicators of Sit-to-Stand.
- Authors
Stevermer, Catherine A.; Gillette, Jason C.
- 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 (seat-off) 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.
- Subjects
BIOMECHANICS; DYNAMICS; KINEMATICS; PATIENT positioning; RESEARCH funding; SITTING position; STANDING position; VIDEO recording; BODY movement; MOTION capture (Human mechanics); DATA analysis software; DESCRIPTIVE statistics
- Publication
Journal of Applied Biomechanics, 2016, Vol 32, Issue 1, p7
- ISSN
1065-8483
- Publication type
Article
- DOI
10.1123/jab.2014-0189