I had an idea for a type of shoe similar yet different from air Nike, and I would appreciate some comments. A hind foot air chamber would be compressed upon a runners foot strike ( with a force up to three times body weight). The air would be pushed through a one way valve into a rigid mid foot chamber- generating highly pressurized air. The pressurized air would then be released into a forefoot chamber through a check valve as the runners weight is transferred to the forefoot just prior to toe-off. The idea is to generate a spring-like effect at toe-off.