Body-sway characteristics during a static upright posture in the elderly

Area of Science:

• Gerontology
• Biomechanics
• Human Physiology

Background:

• Maintaining balance is crucial for elderly independence.
• Age-related changes can affect postural stability.
• Center of Pressure (COP) analysis offers insights into balance control.

Purpose of the Study:

• To assess the reliability of body-sway parameters in the elderly.
• To identify sex and age-related differences in body sway.
• To compare elderly body-sway characteristics with those of young adults.

Main Methods:

• Fifty healthy elderly and 50 healthy young adults participated.
• Thirty-six reliable body-sway parameters from seven domains were analyzed.
• Four additional body-sway factors were measured using COP data at 20 Hz.

Main Results:

• Most body-sway parameters demonstrated high reliability in the elderly.
• Elderly individuals showed significantly greater body sway than young adults.
• Differences were particularly pronounced in sway velocity and periodicity.

Conclusions:

• Elderly body sway displays considerable individual variability.
• About 10% of elderly may fall outside the young adult standard range, especially in velocity and spectrum parameters.
• Unique evaluation criteria are recommended for elderly body sway due to distinct characteristics.