Accelerating locomotor savings in learning: compressing four training days to one

Area of Science:

• Neuroscience
• Motor Control
• Motor Learning

Background:

• Acquiring new motor skills relies on the nervous system's ability to retain motor patterns.
• Motor learning savings, or faster relearning, is a key indicator of memory consolidation.
• Understanding the development and acceleration of savings is crucial for optimizing motor rehabilitation and training.

Purpose of the Study:

• To investigate the development of savings for a novel walking pattern over several days.
• To explore methods for accelerating the savings process and reducing total training time.
• To characterize multiday locomotor savings using a state-space model.

Main Methods:

• Participants underwent a split-belt treadmill adaptation paradigm for 30 minutes daily over 5 consecutive days.
• A state-space model was employed to analyze and quantify locomotor savings.
• Training structures were manipulated on day 1 (single extended vs. four abbreviated exposures) to assess savings by day 5.

Main Results:

• Participants showed near-perfect adaptation to split-belt treadmill speeds by day 5, indicating significant savings.
• Abbreviated, frequent training bouts on day 1 resulted in greater savings by day 5 compared to a single extended session.
• The abbreviated training group achieved savings comparable to 4 days of continuous training, despite only 1 day of practice.

Conclusions:

• Training structure significantly impacts the efficiency of multiday motor learning and savings.
• Compressing training into shorter, repeated sessions can accelerate the acquisition of novel motor patterns.
• Optimizing training delivery can achieve substantial motor learning with reduced overall training duration.