…and maybe the fastest barefoot runner since Abebe Bikila. At age 44, Dr. Mark Cucuzzella is a physician, Air Force Lt. Colonel, and a 2:34 (!) marathoner. Years ago, Cucuzzella’s surgeon told him that his feet were so malformed that he’d have to give up running for good. Instead, Cucuzzella trained himself to run naturally, with a gently forefoot landing.