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Plantar loading during cutting while wearing a rigid carbon fiber insert.

Robin M Queen1, Alicia N Abbey, Ravi Verma

  • 1Michael W. Krzyzewski Human Performance Laboratory, Duke University, Durham, NC.

Journal of Athletic Training
|June 24, 2014
PubMed
Summary

A rigid carbon graphite footplate did not reduce plantar loading on the fifth metatarsal during agility tasks. This intervention altered pressure distribution but was ineffective for preventing stress fractures in athletes.

Keywords:
cross-cuttingfifth metatarsal fractureplantar pressurerigid carbon graphite footplateside cuttingsoccer

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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 pose treatment challenges due to risks of delayed union, nonunion, and recurrence.
  • Agility activities like cutting in soccer and basketball are high-risk for 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 can mitigate stress on the fifth metatarsal during dynamic movements.

Main Methods:

  • A crossover study design was employed in a laboratory setting.
  • Nineteen healthy male athletes performed side-cut and crossover-cut tasks with and without a rigid carbon footplate.
  • Plantar loading data, including peak pressure, force, and contact area, were analyzed using instrumented insoles.

Main Results:

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

Conclusions:

  • A rigid carbon graphite footplate modified plantar pressure profiles during cutting movements in uninjured athletes.
  • The footplate was ineffective 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.