Gait variability in community-dwelling older adults

Area of Science:

• Gerontology
• Biomechanics
• Kinesiology

Background:

• Gait variability is a crucial indicator of mobility and fall risk in older adults.
• Understanding how gait parameters change with speed is essential for assessing functional independence.

Purpose of the Study:

• To characterize gait variability (step-length and step-width) in community-dwelling older adults at usual and fast walking speeds.
• To investigate the impact of increasing gait speed on gait variability.

Main Methods:

• A cross-sectional study involving 95 community-living older adults (age ≥ 65).
• Gait parameters were measured using an instrumented walkway at usual and self-selected fast walking speeds.
• Step-length and step-width variability were quantified using the coefficient of variation.

Main Results:

• Step-length variability was inversely correlated with walking speed (slower speed, higher variability).
• Step-width variability was positively correlated with walking speed (slower speed, lower variability).
• Older adults unable to increase speed showed increased step-length variability and decreased step-width variability when attempting to accelerate.

Conclusions:

• Step-length and step-width variability exhibit opposing relationships with gait speed in older adults.
• Changes in gait variability during attempted acceleration may be significant for predicting disability risk.
• Further research into these variability changes could inform therapeutic interventions for mobility impairments.