Gait attentional load at different walking speeds.

Area of Science:

• Neuroscience
• Biomechanics
• Cognitive Psychology

Background:

• Gait is an attention-demanding task even for healthy young adults.
• Limited research exists on the attentional load across different walking speeds.
• Understanding gait's cognitive cost is crucial for various populations.

Purpose of the Study:

• To investigate motor-cognitive interference during treadmill walking at different speeds (spontaneous, slow, very slow).
• To assess the impact of walking speed on attentional allocation using a backward counting task.
• To compare cognitive performance during walking versus sitting.

Main Methods:

• Participants (n=22) performed a backward counting task while walking at spontaneous, slow, and very slow speeds on a treadmill.
• Cognitive performance was also measured while participants were seated.
• Dual-task (DT) cost was calculated to quantify motor-cognitive interference.

Main Results:

• Higher DT cost on the cognitive task was observed at spontaneous and very slow walking speeds.
• At slow walking speeds, the cognitive task was prioritized, leading to a higher DT cost on the motor task.
• Attentional allocation varied significantly with walking speed, indicating adaptive strategies.

Conclusions:

• Attentional demands during gait are modulated by walking speed.
• Gait prioritization occurs at spontaneous and very slow speeds, suggesting these are more challenging motor conditions.
• Cognitive prioritization at slow speeds highlights the dynamic interplay between motor and cognitive systems.