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An Investigation of Structure, Flexibility and Function Variables that Discriminate Asymptomatic Foot Types
journal contribution
posted on 2023-08-30, 14:36 authored by Sarah P. Shultz, Jinsup Song, Andrew P. Kraszewski, Jocelyn F. Hafer, Smita Rao, Sherry Backus, Rajshree Mootanah, Howard J. HillstromIt has been suggested that foot type considers not only foot structure (high, normal, low arch), but also function (overpronation, normal, oversupination) and flexibility (reduced, normal, excessive). Therefore, this study used canonical regression analyses to assess which variables of foot structure, function, and flexibility can accurately discriminate between clinical foot type classifications. The feet of 61 asymptomatic, healthy adults (18–77 years) were classified as cavus (N = 24), rectus (N = 54), or planus (N = 44) using standard clinical measures. Custom jigs assessed foot structure and flexibility. Foot function was assessed using an emed-x plantar pressure measuring device. Canonical regression analyses were applied separately to extract essential structure, flexibility, and function variables. A third canonical regression analysis was performed on the extracted variables to identify a combined model. The initial combined model included 30 extracted variables; however 5 terminal variables (malleolar valgus index, arch height index while sitting, first metatarsophalangeal joint laxity while standing, pressure-time integral and maximum contact area of medial arch) were able to correctly predict 80.7% of foot types. These remaining variables focused on specific foot characteristics (hindfoot alignment, arch height, midfoot mechanics, Windlass mechanism) that could be essential to discriminating foot type.
History
Refereed
- Yes
Volume
33Issue number
3Page range
203-210Publication title
Journal of Applied BiomechanicsISSN
1543-2688External DOI
Publisher
Human KineticsFile version
- Accepted version
Language
- eng
Official URL
Legacy posted date
2017-01-25Legacy creation date
2017-03-30Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Note
Accepted author manuscript version reprinted, by permission, from 'Journal of Applied Biomechanics' 2016, http://doi.org/10.1123/jab.2016-0001. © Human Kinetics, Inc.Usage metrics
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