Split-Belt Treadmill Walking Alters Lower Extremity Frontal Plane Mechanics

Area of Science:

• Biomechanics
• Gait Analysis
• Human Movement Science

Background:

• Gait speed manipulation can influence frontal plane mechanics.
• Understanding adaptations during split-belt treadmill walking (SBW) is crucial for gait research.
• SBW involves walking with belts moving at different speeds, creating gait asymmetry.

Purpose of the Study:

• To investigate frontal plane joint mechanics (ankle, knee, hip) during SBW.
• To analyze medio-lateral ground reaction forces (ML-GRF) during SBW.
• To explore adaptations in frontal plane mechanics and ML-GRF with sustained SBW.

Main Methods:

• Thirteen healthy participants walked on a split-belt treadmill with asymmetric belt speeds.
• Measurements included frontal plane kinematics and kinetics of lower extremity joints.
• Medio-lateral ground reaction forces (ML-GRF) were recorded throughout the adaptation period.

Main Results:

• No significant changes in frontal plane joint mechanics were observed during early or late SBW adaptation.
• Medio-lateral ground reaction forces (ML-GRF) increased over time in the faster limb.
• Hip moment impulse of the faster limb also increased with adaptation to SBW.

Conclusions:

• SBW does not appear to alter frontal plane joint mechanics in healthy individuals.
• Adaptation to SBW involves increased ML-GRF and hip moment impulse in the faster limb.
• SBW may offer therapeutic potential for individuals with gait pathologies or compensations.