Have you seen a practitioner to determine exactly what is going on?
Lower back discomfort could be from an upstream compensation.
Your hips could be out of alignment.
Are you working up/down stream of the calf?

A couple to check out for your heel & calf.
Friday, February 26th, 2016
April 17th, 2016
Wednesday, October 19th, 2016
Saturday, November 26th, 2016 – Feet & Calves