HOW DOES SHOEGEAR AFFECT HEEL AND ARCH PAIN?

Plantar fasciitis is the main cause of heel and arch pain. The plantar fascia is a large ligamentous structure that runs from the heel bone to the bases of the toes. It provides support to the arch and middle of the foot and acts as a “spring” to provide additional power for propulsion or push off when walking or running.

The plantar fascia is very strong in one way but weaker in another. It has great tensile strength. Tensile strength means “pulling strength.”  If I take metal wire and pull on it until it breaks, the amount of pulling force that it took to break it is it's tensile strength. The same wire, if twisted, breaks much easier.  In other words the metal wire has less torsional (twisting strength) than tensile strength.


Ligaments and tendons of the body have good tensile strength but are susceptible to damage either with strong twisting forces or smaller twisting forces that are repetitive. A foot that rolls in too much (overpronation) or rolls out too much (oversupination) leads to chronic repetitive twisting or torsional strain of the plantar fascia. This is very old information that has been forgotten or neglected in the design of many modern shoes. 

The shank is the portion of the shoe that resists twisting or torsional forces. Steel shanks have existed for centuries. Other materials such as fiberglass, graphite and rigid thermoplastics can be used in lieu of steel to ensure that shanks in shoes do not twist or bend. The part of the shoe that corresponds to the ball of the foot should be flexible but not the shank. Here is a brief primer on running shoe anatomy: http://www.aapsm.org/runshoe-running-anatomy.html

Here is a good website that evaluates the torsional stability of shoes:  http://opistest.com/find-your-shoe/

If you suffer from plantar fasciitis or heel pain, call our San Antonio podiatry office to schedule an appointment at 210-490-3668. Dr. Ed Davis specializes in heel pain treatment.

You Might Also Enjoy...

What Is A Podiatrist?

A podiatrist, also called a doctor of podiatric medicine, is a specialist who provides medical diagnosis and treatment of foot and ankle problems, such as bunions, heel pain, spurs, hammertoes, neuromas, ingrown toenails, warts, corns and calluses.

Ten Things You Should Know

Does your foot and ankle specialist fully understand your needs? Is your foot and ankle specialist Board Certified? Does your podiatrist or foot and ankle specialist use the latest technology and equipment? Do they recommend treatment besides surgery?

FOOT ORTHOTICS

The term “orthotic” is defined as an external device used to modify function of a body part. It generally applies to professionally made or prescription devices but is also used loosely by non-medical personnel to define a large range of...

OUR AFFILIATIONS

Dr. Ed Davis is pleased to announce affiliation with US Neuropathy Centers. US Neuropathy Centers is composed of a network of doctors focused on the use of the latest technology in the treatment of nerve pain in the lower extremity caused by peripheral...