Having your saddle too high keeps the foot plantarflexed (toe pointed down), causing constant contraction of the calf muscles.
Lowering your seat and making sure that your cleats aren't pushed all the way forward towards the toe will help to even out what muscles you're using to pedal.
Allowing the foot to dorsiflex (toe pointed up) during the bottom portion of the pedal stroke can ease the tension on the Achilles, allowing the tendon to have needed periods of rest.
Just in case your insurance says "no".