Split-belt walking: An experience that is hard to forget

Area of Science:

• Human locomotion
• Motor learning
• Biomechanics

Background:

• Split-belt walking is a common method to study human gait adaptability.
• While short-term savings are well-documented, long-term retention of locomotor adaptation is less understood.

Purpose of the Study:

• To investigate if adaptation to split-belt walking is retained after a prolonged three-week interval.
• To determine if locomotor patterns are stored in long-term memory or forgotten.

Main Methods:

• Fourteen healthy adults underwent a split-belt walking adaptation and washout protocol.
• Singular Spectrum Analysis was used to quantify adaptation trends in step length and double support asymmetry.
• Participants returned three weeks later for a second exposure to assess savings.

Main Results:

• Substantial savings in adaptation were observed after the three-week interval, with significant decreases in step length asymmetry volume and plateau time.
• No significant differences were found in double support asymmetry or during the washout phase.

Conclusions:

• Able-bodied individuals retain split-belt walking adaptation savings over three weeks.
• Previous split-belt walking experience is not fully forgotten after prolonged periods, suggesting its inclusion in future studies.
• Findings may inform understanding of gait training in rehabilitation by comparing long-term savings in patient groups.