Factors contributing to racial differences in gait mechanics differ by sex

Area of Science:

• Biomechanics
• Human Movement Science
• Racial Health Disparities

Background:

• Recent studies highlight racial differences in gait mechanics.
• Understanding the underlying factors (innate vs. modifiable) is critical for research and clinical applications.

Purpose of the Study:

• To investigate if anthropometric, strength, and health status measures explain racial gait differences between African Americans and White Americans.
• To identify factors contributing to racial variations in gait for targeted interventions.

Main Methods:

• Collected anthropometric, strength, and health data from 92 young adults.
• Utilized 3D motion capture and force plates to analyze gait at self-selected and fast walking speeds.
• Employed stepwise linear regression to assess the explanatory power of measured variables on racial gait differences.

Main Results:

• No racial gait differences in males were explained by the measured variables.
• In females, Q-angle and ankle dorsiflexion strength explained racial differences in walking speed.
• Ankle plantarflexion strength differences accounted for racial variations in ankle plantarflexion angle.

Conclusions:

• Factors explaining racial gait differences in females are both innate and modifiable.
• Emphasizes the need for diverse normative gait databases in research.
• Identifies potential targets for interventions to reduce racial health disparities in gait.