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Age-related differences in inter-joint coordination during stair walking transitions
Shiu-Ling Chiu1, Chien-Chi Chang2, Jack T Dennerlein3
1Department of Environmental Health, Harvard School of Public Health, Boston, MA, USA; Liberty Mutual Research Institute for Safety, Hopkinton, MA, USA.
Gait & Posture
|June 6, 2015
Summary
Older adults exhibit reduced inter-joint coordination during stair walking transitions, impacting gait stability and fall risk. This age-related change suggests less flexibility in modulating joint movements for safer stair negotiation.
Area of Science:
- Biomechanics
- Gerontology
- Neuromuscular Control
Background:
- Stair negotiation is a challenging task for older adults, frequently leading to falls.
- Understanding age-related changes in gait coordination is crucial for developing fall prevention strategies.
Purpose of the Study:
- To investigate the effect of aging on inter-joint coordination patterns and variability during stair-floor transitions.
- To compare gait coordination between young and older adults during floor-to-stair and stair-to-floor ambulation.
Main Methods:
- Gait and motion analysis of lower extremities in 20 young and 20 older adults.
- Measurement of continuous relative phase (CRP) for hip, knee, and ankle joint coordination.
- Calculation of mean absolute relative phase (MARP) for coordination pattern and deviation phase (DP) for variability.
Main Results:
- Older adults showed significantly smaller MARP for hip-knee coordination during most phases of stair transitions.
- A smaller MARP was observed in older adults for knee-ankle coordination during the swing phase of stair-to-floor transitions.
- Older adults exhibited significantly lower hip-knee DP values across most phases, indicating reduced coordination variability.
Conclusions:
- Normal aging is associated with diminished independent control of adjacent joints during stair negotiation.
- Older adults demonstrate less adaptability in inter-joint coordination during stair walking transitions, potentially increasing fall risk.
