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Related Experiment Videos

Foot pressure distribution during walking and shuffling.

H S Zhu1, J J Wertsch, G F Harris

  • 1Rehabilitation Medicine Service, VA Medical Center, Milwaukee, WI.

Archives of Physical Medicine and Rehabilitation
|May 1, 1991
PubMed
Summary

A shuffling gait reduces peak plantar pressures on the insensate foot by increasing foot-flat time and weight-bearing area. This gait modification helps minimize tissue damage from excessive pressure, particularly at the metatarsals and hallux.

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Area of Science:

  • Biomechanics
  • Podiatry
  • Human locomotion

Background:

  • Insensate feet are susceptible to tissue damage due to repetitive, excessive pressures.
  • Previous theories suggest a shuffling gait may reduce plantar pressures by increasing foot-flat duration.

Purpose of the Study:

  • To quantitatively evaluate the hypothesis that a shuffling gait minimizes excessive local plantar pressures.
  • To analyze the effects of shuffling gait on peak pressures, contact durations, and pressure-time integrals.

Main Methods:

  • Utilized a portable, in-shoe pressure data-acquisition system with seven sensors per insole.
  • Acquired plantar pressure data from ten able-bodied subjects during shuffling and walking at a controlled cadence.
  • Analyzed and compared peak pressures, foot-to-floor contact durations, and pressure-time integrals between the two gaits.

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Main Results:

  • Shuffling gait significantly decreased peak plantar pressures at all sensor sites, with notable reductions at the first/second metatarsals (up to 57.8%) and hallux (up to 63.2%).
  • Overall summated peak plantar pressures decreased by 41.6% during shuffling.
  • Foot-to-floor contact durations increased by 22.0% to 76.9%, while pressure-time integrals showed varied changes, increasing at the heels and decreasing at the forefoot and hallux.

Conclusions:

  • Findings support the hypothesis that a shuffling gait increases the period of foot flat and the area of weight bearing.
  • This leads to reduced peak plantar pressures, offering a potential strategy for preventing tissue damage in insensate feet.