Z-Coil Pain Relief Footwear

In the early 1980s, Alvaro Z. Gallegos was running an average of seven miles a day. He suffered all the typical injuries associated with running heel spurs, plantar fasciitis, knee trouble, hip pain, and back pain. And although he owned a shoe store at the time and had access to all kinds of running shoes, he was unable to find a shoe that eased his pain. Realizing that the source of his pain was impact, Al reasoned that putting a shock-absorber in the heel of his shoe would reduce the force of impact. And as an added benefit, a spring would supply some form of energy return, to aid him run faster and farther.