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Determining the maximum diameter for holes in the shoe without compromising shoe integrity when using a multi-segment
Rebecca Shultz1, Thomas Jenkyn
1Human Performance Laboratory, School of Medicine, Stanford University, United States.
Medical Engineering & Physics
|September 6, 2011
Summary
Researchers determined the largest shoe window size for accurate in-shoe foot motion capture. An oval hole of 1.7cm x 2.5cm allows optical motion capture without compromising shoe integrity or altering foot kinematics.
Area of Science:
- Biomechanics
- Sports Medicine
- Orthopedics
Background:
- Accurate measurement of in-shoe foot joint motion necessitates multi-segment foot models.
- Optical motion capture requires skin-mounted markers, often necessitating shoe modifications.
- Balancing marker visibility with shoe structural integrity is crucial for valid kinematic data.
Purpose of the Study:
- To identify the maximum allowable hole size in running shoe uppers for kinematic analysis.
- To assess the impact of shoe upper modifications on structural integrity and foot kinematics.
- To determine feasibility of in-shoe motion capture using optical systems.
Main Methods:
- Tested three running shoe designs (neutral, motion control, stability) with progressively larger oval holes.
- Measured hindfoot and forefoot motion, medial longitudinal arch height-to-length ratio, and hallux angle.
- Utilized a single subject performing level walking with optical motion capture.
Main Results:
- The largest hole size that maintained shoe integrity was 1.7cm x 2.5cm.
- Motion control shoes exhibited the least deformation.
- Forefoot twist showed the least kinematic alteration across hole sizes in neutral and stability shoes.
Conclusions:
- Optical motion capture with multi-segment foot models is feasible for in-shoe kinematics with holes < 1.7cm x 2.5cm.
- Shoe design influences deformation and kinematic changes.
- This finding supports accurate in-vivo biomechanical analysis of foot function during locomotion.
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