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Age-dependent differences in lateral balance recovery through protective stepping
Marie-Laure Mille1, Marjorie E Johnson, Katherine M Martinez
1Department of Physical Therapy and Human Movement Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Clinical Biomechanics (Bristol, Avon)
|May 14, 2005
Summary
Older adults exhibit riskier balance recovery strategies, using more steps and experiencing limb collisions, unlike younger adults. This highlights age-related challenges in maintaining lateral stability and preventing falls.
Area of Science:
- Gerontology
- Biomechanics
- Neuroscience
Background:
- Aging is associated with increased risk of falls, particularly concerning lateral balance.
- Protective stepping, a key balance recovery strategy, may be compromised by age-related neuromusculoskeletal changes.
Purpose of the Study:
- To compare lateral protective stepping responses in healthy young and elderly adults.
- To assess differences in response patterns, kinematics, and hip abduction torque during balance recovery.
Main Methods:
- Ten young and 10 elderly adults underwent pseudorandom lateral waist-pulls.
- Force platforms and motion analysis quantified stepping strategies and kinematics.
Main Results:
- Younger adults used single sidesteps; older adults favored multi-step crossover strategies with limb collisions.
- Elderly individuals' side steps were longer, slower, and higher, with increased lateral trunk motion.
- Older adults generated greater, but slower, hip abduction torque during single support.
Conclusions:
- Age-related deficits in lateral balance control involve riskier stepping strategies and altered biomechanics.
- Impaired hip abduction torque capacity and trunk mobility may contribute to balance dysfunction in aging.
- Findings offer insights into balance control issues and fall prevention in the elderly.