An athletic shoe with a force responsive sole includes a first sole portion (110) having a multiplicity of projecting cleats (20), a second sole portion (12) with corresponding apertures (22) to receive the cleats (20). In one embodiment, a resilient membrane (14) is positioned between the sole portions...http://www.google.es/patents/US5595003?utm_source=gb-gplus-sharePatente US5595003 - Athletic shoe with a force responsive sole
