> World class athletes have few foot defects? Can you say selection effect? Actually "foot defects" would appear more in world class athletes: the strain they

> World class athletes have few foot defects? Can you say selection effect? Actually "foot defects" would appear more in world class athletes: the strain they put on their feet will expose any small defect that would normally go unnoticed by someone with a sedentary lifestyle. As long as the problem isn't too serious, their running career is not jeopardized.