HOI's Sports Health Report with Dr. Gazzaniga Hoag Orthopedic Institute's Dr. Gazzaniga suggests seeing a doctor if you notice any knee swelling or pain as it could be a sign of a torn ACL. More Sports Health Report Videos HOI's Sports Health Report with Dr. Ting Hoag Orthopedic Institute's Dr. Ting explains the symptoms of a concussion. HOI's Sports Health Report with Dr. Petrie Hoag Orthopedic Institute's Dr. Petrie recommends athletes strengthen their chest and shoulder muscles to avoid shoulder injuries. HOI's Sports Health Report with Dr. Lee Hoag Orthopedic Institute's Dr. Lee suggests precautions for decreasing the risks of neck and back injury during sports. HOI's Sports Health Report with Dr. Grumet Hoag Orthopedic Institute's Dr. Grumet urges athletes to avoid heat illness by taking frequent breaks and knowing the signs of illness.