Age-related changes in the ability to side-step during gait

Area of Science:

• Gerontology
• Biomechanics
• Human Movement Science

Background:

• Safe mobility requires adapting gait, including changes of direction like side-stepping, to navigate environments and avoid obstacles.
• Side-stepping is a common maneuver used to avoid obstacles during locomotion.

Purpose of the Study:

• To investigate age-related differences in the capacity for sideways stepping during gait.
• To quantify changes in speed, accuracy, and stepping strategy during sideways gait adjustments in older adults.

Main Methods:

• Comparative analysis of gait parameters between young (mean age 27) and older women (mean age 70).
• Participants performed a task requiring rapid sideways shifts in response to visual cues while maintaining forward progression.
• Measurements included step count, speed changes, and foot placement accuracy during and after the sideways step.

Main Results:

• Older women used more steps to accomplish sideways shifts (74% vs. 42% requiring >1 extra step).
• Younger women maintained average speed during sideways shifts, while older women experienced a 3.3% speed reduction.
• Older women exhibited significantly higher foot placement error rates (22%) compared to younger women (3%) post-sidestep.

Conclusions:

• Older women demonstrate reduced ability to quickly and accurately integrate sideways gait adjustments.
• Age-related declines in motor control and balance likely contribute to difficulties in dynamic gait modifications.
• Findings highlight potential risks for falls and reduced mobility in older adults due to impaired sideways stepping capabilities.