Every couple of weeks we like to check in with the doctor who not only knows medicine, but also knows endurance sports—Dr. Mark Klion. Dr. Klion is a Manhattan-based certified orthopedic surgeon, Ironman, ultra-runner and creator of the Bodyworks MD DVD series. tankless water heater atlanta . Endurance Planet listeners post their questions for Dr. Klion on our Facebook Fans page and he answers them here in podcast form. This time around we get Dr. Wisconsin Foundation Repair companies . Klion’s take on P90X, and his recommendations on combating neck, back, and knee injuries.