See the genetic doping item from earlier this week. 😛 This opens the door for any athlete to try to get mechanical aids past the IAAF and IOC. It is an incredibly slippery slope from spring-loaded prosthetics to spring-loaded shoes. There was a Puma sprint spike back in the '70s or '80s that was banned from use in competition by the IAAF because it was deemed to provide an unnatural, ergogenic aid to the athlete. This turn of events would seem to open floodgates.