Related Experiment Videos
Determinants for stair climbing by elderly from muscle morphology
Kazumi Masuda1, Jundong Kim, Ryuta Kinugasa
1Faculty of Education, Kanazawa University, Kanazawa-city, Ishikawa, Japan. masuda@ed.kanazawa-u.ac.jp
Perceptual and Motor Skills
|June 26, 2002
Summary
Muscle size in elderly women impacts stair climbing. Larger knee extensor and psoas major muscles correlate with faster stair ascent and descent speeds, suggesting muscle mass is key for mobility.
Area of Science:
- Gerontology
- Biomechanics
- Musculoskeletal Health
Background:
- Maintaining mobility is crucial for elderly individuals' independence and quality of life.
- Stair negotiation is a common daily activity that requires significant lower limb strength and coordination.
- Age-related muscle loss (sarcopenia) can impair functional performance, including stair climbing.
Purpose of the Study:
- To investigate the relationship between hip and lower extremity muscle cross-sectional area (CSA) and stair ascent/descent speed in elderly women.
- To identify specific muscle groups that contribute to stair climbing performance in older adults.
- To explore the potential role of muscle mass in functional capacity for stair negotiation.
Main Methods:
- Magnetic resonance imaging (MRI) was used to measure the muscle cross-sectional area (CSA) of hip and lower extremity muscles.
- 127 women aged 60-70 years participated in the study.
- Participants performed a 12-step stair ascent and descent task, with speeds analyzed from video recordings.
Main Results:
- Ascent speed showed significant positive correlations with the CSA of knee extensor muscles (r=.21, p<.05) and the psoas major muscle (r=.25, p<.01).
- Descent speed also correlated significantly with the CSA of knee extensor muscles (r=.20, p<.05) and the psoas major muscle (r=.18, p<.05).
- No significant correlations were found between stair speeds and the CSA of other investigated muscle groups.
Conclusions:
- Muscle mass, specifically of the knee extensor and psoas major muscles, is a significant factor influencing stair ascent and descent speed in elderly women.
- These findings suggest that preserving or increasing the muscle mass of these key muscle groups may enhance functional mobility and independence in older adults.
- Targeted interventions focusing on knee extensor and psoas major muscle strength could potentially improve stair climbing capacity in the geriatric population.