With the carbon fiber shoes, there is now essentially mechanical, uh, "assistance" in running. Improvement of equipment is always a massive gray area. Cycling

With the carbon fiber shoes, there is now essentially mechanical, uh, "assistance" in running. Improvement of equipment is always a massive gray area. Cycling (aside from electric motors) has aerodynamic bikes, wind tunnel access. XC skiing has environmentally bad teflon wax. Swimming, theoretically the most naked/equipment-less sport, has sharkskin suits and buoyancy aids. There are other advantages like expensive altitude tents.