an improved resilient shoe sole includes an outsole having a substantially inelastic side wall with a heel cavity . a substantially inelastic platform is located below the heel cavity , and a connector connects the platform with the side wall . the connector has a particular length and thickness to maintain the platform substantially below the sidewall when the shoe sole is not under a wearer &# 39 ; s weight . when brought under forces of a wearer &# 39 ; s weight , the connector bends and stretches as the spring compresses to allow the platform to deflect into the heel cavity . as weight is removed , the connector and spring cause the platform to deflect out of the heel cavity , biasing the platform below the side wall .