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Plantar Loading During Cutting While Wearing a Rigid Carbon Fiber Insert.

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Summary

A rigid carbon graphite footplate did not effectively reduce plantar loading on the fifth metatarsal during agility tasks in athletes. While it altered pressure distribution, it did not prevent injury risks associated with stress fractures.

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Area of Science:

  • Sports Medicine
  • Biomechanics
  • Orthopedics

Background:

  • Fifth metatarsal stress fractures are common overuse injuries in athletes, particularly during agility tasks.
  • These fractures present treatment challenges due to risks of delayed union, nonunion, and recurrence.
  • Agility activities like cutting are implicated in the high incidence of these injuries.

Purpose of the Study:

  • To investigate the impact of a rigid carbon graphite footplate on plantar loading during two specific agility tasks.
  • To determine if this intervention could mitigate forces contributing to fifth metatarsal stress fractures.

Main Methods:

  • A crossover study design was employed with 19 recreational male athletes.
  • Participants performed 45° side-cut and crossover-cut tasks with and without a rigid carbon graphite footplate.
  • Plantar loading data, including peak pressure, maximum force, force-time integral, and contact area, were collected using instrumented insoles.

Main Results:

  • The footplate increased peak pressures in the total foot and lateral midfoot during side-cuts.
  • During crossover-cuts, the footplate elevated total foot and lateral midfoot peak pressures and increased lateral forefoot force-time integral.
  • Conversely, the footplate decreased contact area in the total foot and lateral forefoot during crossover-cuts.

Conclusions:

  • A rigid carbon graphite footplate significantly altered plantar pressure and force distribution during cutting maneuvers.
  • However, the footplate did not demonstrate effectiveness in reducing overall plantar loading, specifically beneath the fifth metatarsal.
  • Further research may be needed to explore alternative interventions for preventing fifth metatarsal stress fractures in athletes.