Aging may negatively impact movement smoothness during stair negotiation
| Autor: | Jack T. Dennerlein, Philippe C. Dixon, Xu Xu, Leia Stirling, C.C. Chang, Jeffrey M. Schiffman |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male 030506 rehabilitation medicine.medical_specialty Aging Acceleration Biophysics Experimental and Cognitive Psychology Motion (physics) 03 medical and health sciences Young Adult 0302 clinical medicine Physical medicine and rehabilitation Stairs medicine Humans Orthopedics and Sports Medicine Gait Postural Balance Functional movement Aged Aged 80 and over Smoothness (probability theory) Movement (music) Stair negotiation General Medicine Adaptation Physiological Stair Climbing Jerk Head Movements Female 0305 other medical science Psychology 030217 neurology & neurosurgery Psychomotor Performance Stair ascent |
| Zdroj: | Human movement science. 60 |
| ISSN: | 1872-7646 |
| Popis: | Stairs represent a barrier to safe locomotion for some older adults, potentially leading to the adoption of a cautious gait strategy that may lack fluidity. This strategy may be characterized as unsmooth; however, stair negotiation smoothness has yet to be quantified. The aims of this study were to assess age- and task-related differences in head and body center of mass (COM) acceleration patterns and smoothness during stair negotiation and to determine if smoothness was associated with the timed "Up and Go" (TUG) test of functional movement. Motion data from nineteen older and twenty young adults performing stair ascent, stair descent, and overground straight walking trials were analyzed and used to compute smoothness based on the log-normalized dimensionless jerk (LDJ) and the velocity spectral arc length (SPARC) metrics. The associations between TUG and smoothness measures were evaluated using Pearson's correlation coefficient (r). Stair tasks increased head and body COM acceleration pattern differences across groups, compared to walking (p 0.05). LDJ smoothness for the head and body COM decreased in older adults during stair descent, compared to young adults (p ≤ 0.015) and worsened with increasing TUG for all tasks (-0.60 ≤ r ≤ -0.43). SPARC smoothness of the head and body COM increased in older adults, regardless of task (p 0.001), while correlations showed improved SPARC smoothness with increasing TUG for some tasks (0.33 ≤ r ≤ 0.40). The LDJ outperforms SPARC in identifying age-related stair negotiation adaptations and is associated with performance on a clinical test of gait. |
| Databáze: | OpenAIRE |
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