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Age-related changes in maximal hip strength and movement speed
Jesse C Dean1, Arthur D Kuo, Neil B Alexander
1Department of Biomedical Engineering, The University of Michigan, Ann Arbor 48109-2125, USA. jcdean@umich.edu
Summary
Older women experience significant declines in hip strength and leg movement speed, impacting their ability to perform quick leg movements and potentially increasing fall risk.
Area of Science:
- Gerontology
- Biomechanics
- Human Movement Science
Background:
- Age is associated with reduced capacity for whole leg movements originating at the hip in women.
- This age-related decline may influence mobility and increase the risk of falls.
Purpose of the Study:
- To quantify age-related changes in hip strength and velocity in healthy women.
- To investigate the relationship between strength, velocity, and load in leg movements.
Main Methods:
- Maximum hip strength and velocity were measured in 12 young and 12 older healthy women.
- Measurements included isometric torque, maximum angular velocities, and velocities under varying isotonic loads.
Main Results:
- Older women exhibited 22-31% lower isometric hip torque compared to younger women (p<.001).
- Maximum leg movement velocities were 16% lower in older women (p<.001).
- Older participants also showed reduced velocity as a function of load and lower maximum power output (p<.001).
Conclusions:
- Both reduced maximum strength and velocity contribute to the age-related decline in rapid leg movement ability.
- These findings highlight potential mechanisms underlying age-related mobility impairments and fall risk.