Achilles tendon connects the underside of the heel to the system of ligaments in the lower leg. An inflammation of this tendon is known as Achilles Tendinitis. In selecting suitable footwear, a shoe-fitter will recommend a product which will not allow an over pronation or supination.
Footwear should have a reasonable heel height and not overly flat. This to relieve stress to the inflamed area. If a bespoke insole or other orthotic is to be worn, footwear that correctly accommodate the orthotic will be necessary.