The Ramp protocol: Uncovering individual differences in walking to an auditory beat using TeensyStep

Area of Science:

• Biomechanics
• Neuroscience
• Human gait analysis

Background:

• Synchronizing walking to auditory rhythms appears effortless but shows significant individual variability.
• Existing methods lack a standardized approach to quantify spontaneous adaptation to changing rhythmic auditory stimuli during gait.

Purpose of the Study:

• To introduce and validate the Ramp protocol for measuring spontaneous gait adaptation to tempo-changing auditory rhythms.
• To develop and assess a novel quantification method, the Response Score, for characterizing individual differences in rhythmic entrainment.

Main Methods:

• Development and validation of the TeensyStep device for real-time heel-strike detection and auditory stimulus synchronization.
• Implementation of the Ramp protocol: participants walk at preferred cadence, followed by a metronome that progressively accelerates or decelerates.
• Introduction of the Response Score to quantify individual adaptation profiles to the changing metronome tempo.

Main Results:

• The TeensyStep device demonstrated reliable performance compared to a gold standard for step detection.
• The Ramp protocol successfully captured individual differences in spontaneous gait adaptation to tempo changes.
• The Response Score effectively distinguished varying adaptation patterns in response to rhythmic auditory stimuli.

Conclusions:

• The Ramp protocol provides a sensitive method for assessing spontaneous gait synchronization to auditory rhythms.
• The Response Score offers a valuable tool for quantifying and differentiating individual adaptation strategies in gait tasks.
• This approach holds potential for clinical and research applications in understanding human motor control and rhythmic entrainment.