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Journal of the American Podiatric Medical Association
Volume 96 Number 4 330-343 2006
Copyright © 2006 American Podiatric Medical Association

Changes in Male Foot Shape and Size with Weightbearing

Vern L. Houston, PhD, CPO * {dagger}, Gangming Luo, PhD * {dagger}, Carl P. Mason, MSBE *, Martin Mussman, DPM * {ddagger}, Maryanne Garbarini, MA, PT * {dagger} and Aaron C. Beattie, BA * {dagger}

* Veterans Affairs New York Harbor HealthCare System, New York, NY.
{dagger} Department of Rehabilitation Medicine, New York University School of Medicine, New York, NY.
{ddagger} Veterans Health Administration Podiatric Medicine Service, New York, NY.

Corresponding author: Aaron C. Beattie, BA, Veterans Affairs New York Harbor HealthCare System, 423 E 23rd St, Room 14045W, New York, NY 10010.

Abstract

Accurate, consistent measurement of foot-ankle geometry is essential for the design and manufacture of well-fitting, functional, comfortable footwear; for the diagnosis of certain biomechanical disorders; and for consistent longitudinal monitoring and assessment of pedorthic treatment outcomes. We sought to formulate a basic set of measures characterizing the principal geometric dimensions of the foot, to investigate how these measures vary with increasing weightbearing, and to explore the implications of weightbearing changes in pedal geometry for orthopedic footwear design and manufacture. The right feet of 40 healthy men aged 22 to 71 years were scanned using the Department of Veterans Affairs Pedorthics Optical Digitizer in neutral alignment, sequentially bearing 0%, 10%, 25%, 50%, and 100% of the subjects’ body weight. With support of the full body weight, the following mean changes in the pedal parameters were observed: heel-to-toe length, 1.5%; ball width, 4.3%; maximum heel width, 4.8%; and instep height, –9.3%. On average, 71% of the changes sustained in the pedal parameters at full weightbearing occurred when, or before, 25% of the body weight was applied. (J Am Podiatr Med Assoc 96(4): 330–343, 2006)






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Copyright © 2006 by the American Podiatric Medical Association.