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Measuring foot placement and clearance during stair descent
Jennifer Muhaidat1, Andrew Kerr, Danny Rafferty
1School of Health, Glasgow Caledonian University, 70 Cowcaddens Road, G4 0BA Glasgow, UK. jennifer.muhaidat@gcu.ac.uk
Gait & Posture
|January 15, 2011
Summary
This study introduces a new method to measure foot placement and clearance during stair descent, crucial for preventing falls. Findings provide normal values for foot placement and clearance, aiding future gait research.
Area of Science:
- Biomechanics
- Human Gait Analysis
- Fall Prevention Research
Background:
- Falls during stair descent pose a significant risk, often linked to improper foot placement and inadequate step clearance.
- Existing methods for analyzing stair descent kinematics may lack precision in quantifying foot placement and clearance parameters.
Purpose of the Study:
- To investigate a novel method for measuring foot placement and clearance during stair descent in healthy individuals.
- To establish baseline kinematic data for foot placement and clearance during stair negotiation.
- To provide a technical foundation for future research on stair falls and gait analysis.
Main Methods:
- Employed a new measurement technique to quantify foot placement and clearance during stair descent in 10 healthy young adults.
- Foot placement was assessed by calculating the percentage of foot overhang on each step.
- Foot clearance was measured as the combined vertical and horizontal distance from the heel to the step edge, differentiating between landing and passing clearance.
Main Results:
- No significant effect of trial repetition was observed on foot placement or clearance measurements (p>0.05).
- A significant effect of step number was found for both landing and passing clearance (p=0.01, p<0.001).
- Both landing and passing clearances were significantly greater on the third step compared to the second, with passing clearance consistently exceeding landing clearance (p<0.001).
Conclusions:
- The developed measurement methods are repeatable and provide valuable normative data for foot placement and clearance during stair descent.
- These findings can inform the design of future studies investigating gait mechanics and fall prevention strategies on stairs.
- The study highlights the importance of step-specific clearance variations in stair negotiation biomechanics.
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