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Citation |
Etnyre B, Thomas DQ. Phys. Ther. 2007; 87(12): 1651-1666. |
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Affiliation |
Department of Kinesiology, MS-545, Rice University, 6100 Main, Houston, TX 77005, USA. etnyre@rice.edu |
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Copyright |
(Copyright © 2007, American Physical Therapy Association) |
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DOI |
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PMID |
17940102 |
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Abstract |
BACKGROUND AND PURPOSE: Unlike gait analysis, no commonly accepted method for studying sit-to-stand (STS) movements exists. Most previous studies describing STS events used various methods to identify movement events while restricting sitting positions and movements. The present study observed natural rising from a sitting position using a simple method for measuring this common task. The purposes of this study were to compare commonly performed STS movements and to propose a standard system for defining identifiable sequential events. SUBJECTS AND METHODS: Ground reaction forces of 100 adults who were healthy (50 male, 50 female) were recorded using a force platform as each participant performed 4 methods of rising from sitting on a standard chair. The 4 STS conditions were: with arms free, with hands on knees, using armrests, and with arms crossed. RESULTS: For each subject, 11 recorded events from the vertical, fore-aft, and lateral dimensions were identified for all arm-use conditions. The only significant and clinically relevant force difference among arm-use conditions was that the armrests condition produced less average force than the other 3 conditions during the seat-off and vertical peak force events. Among average event times, the armrests condition showed significantly longer time to the vertical peak force event than the other conditions. DISCUSSION AND CONCLUSION: Because these events occurred invariably in sequential order for every individual for all arm-use conditions in a relatively large sample of observations during natural STS movements, this method may be useful for establishing a standard method to assess and compare patient functionality and allow comparisons among STS research studies. Language: en |