Sports medicine doctors are more focused on the complete health care of athletes, while orthopedic doctors specialize in the operative treatment of injuries. Nearly 90% of sports injuries are non-surgical, and both sports medicine doctors and orthopedic doctors are trained in the care of musculoskeletal problems. Sports medicine doctors are also trained in non-musculoskeletal area of sports, which include concussions, overtraining and fatigue, nutrition, training and conditioning, exercise induced asthma, and return-to-play issued after an injury or sickness.