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Research Reports |
V Dubost, MS, is a research engineer, Geriatrics Department, Saint-Etienne University Hospitals, Saint-Etienne, France, and is a doctoral student in the Physiology, Physiopathology of Exercise, and Handicap (PPEH) Laboratory, University J. Monnet Saint-Etienne, Saint-Etienne, France
O Beauchet, MD, MS, is a neurologist, Geriatrics Department, Saint-Etienne University Hospitals, and Department of Rehabilitation and Geriatrics, Geneva University Hospitals, Geneva, Switzerland. He is a doctoral student in the Physiology, Physiopathology of Exercise, and Handicap (PPEH) Laboratory, University J. Monnet Saint-Etienne. He also is a clinical lecturer and specialist in geriatric rehabilitation, Department of Rehabilitation and Geriatrics, Geneva University Hospitals, and School of Sport Science, University J. Monnet Saint-Etienne
P Manckoundia, MD, MS, is an internal medical doctor, Geriatrics Department, Dijon University Hospitals, Dijon, France, and is a doctoral student in the INSERM Laboratory (ERIT-M 0207) of Movement, Plasticity, and Performance, Burgundy University, Dijon, France
F Herrmann, MD, MPH, is a statistician, Department of Rehabilitation and Geriatrics, Geneva University Hospitals, and is a clinical lecturer, Statistics Department, Geneva University Hospitals
F Mourey, PT, PhD, is clinical leader in geriatric rehabilitation, Geriatrics Department, Dijon University Hospitals, and is a clinical lecturer in the INSERM Laboratory (ERIT-M 0207) of Movement, Plasticity, and Performance, Burgundy University
Ms Dubost, Dr Manckoundia, and Dr Mourey provided concept/idea/research design. Ms Dubost and Dr Mourey provided writing. Ms Dubost and Dr Manckoundia provided subjects and data collection, and Ms Dubost and Dr Herrmann provided data analysis. Dr Beauchet provided consultation (including review of manuscript before submission)
Address all correspondence to Ms Dubost at Service de Gérontologie Clinique, Hôpital de la Charité, CHU de Saint-Etienne, 42055 Saint Etienne Cedex 2, France (veronique-dubost{at}club-internet.fr)
Background and Purpose. Trunk motion plays an important role in achieving both sit-to-stand and stand-to-sit transfers. However, these 2 body transfers depend on different postural and mechanical constraints. Although the effects of aging on sit-to-stand transfers have been widely studied, there is a lack of information concerning stand-to-sit transfers. The aim of this study was to determine how angular displacements of the trunk and shank are affected by aging during sit-to-stand and stand-to-sit transfers. Subjects. Ten community-dwelling older adults (mean age=75.9 years, SD=3.2) and 9 young adults (mean age=26.8 years, SD=4.7) volunteered to participate. Methods. Maximal angular displacements of the trunk and shank with respect to the vertical (ie, orientation angles) were measured, during standing up and sitting down, using an optoelectronic movement analyzer. Results. For standing up, there was no difference between the young and older adults with regard to both maximal orientation angles. During sitting down, the maximal shank orientation angle was not affected by age, whereas the older adults had a smaller trunk motion compared with the young adults (approximately 10° less). Discussion and Conclusion. The results showed that older adults tended to minimize the forward body displacement during sitting down. This strategy could be seen as an adaptive mechanism to decrease the risk of anterior disequilibrium. The authors suggest that this feature could be used as an early marker of aging on postural control.
Key Words: Aging • Kinematics • Movement • Postural transitions • Sitting down
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