Attention demanding tasks during treadmill walking reduce step width variability in young adults

Area of Science:

• Biomechanics of human locomotion
• Gait analysis and motor control
• Geriatric fall prevention research

Background:

• Step time and width variability are linked to falls in older adults.
• Attention-demanding tasks impact gait parameters like step time.
• Previous research indicates attention tasks may decrease step width variability in young adults.

Purpose of the Study:

• To investigate the effect of the Stroop test on step width variability in young adults.
• To confirm or refute preliminary findings on attention tasks and gait stability.

Main Methods:

• Fifteen healthy young adults walked on a treadmill under two conditions: normal walking and performing the Stroop test.
• Gait data, including step width, were collected using a motion capture system.
• Step width variability was calculated as the standard deviation of step width measurements.

Main Results:

• Step width showed a non-significant 4% decrease during the Stroop test (p=0.10).
• Step width variability significantly decreased by 16% during the Stroop test (p=0.029).

Conclusions:

• Performing an attention-demanding task significantly reduces step width variability in young adults during treadmill walking.
• This reduction may indicate a voluntary adaptation towards a more conservative gait pattern.
• Further research is needed to explore this in older adults and its direct link to fall risk.