Dr. Joe Uhan is a physical therapist, Board­-Certified Orthopedic Specialist, coach.....oh, and he can run!  Joe can be seen and read regularly on IRunFar and UltraRunning Magazine.  He joins The Nation to talk about running efficiency and bio-mechanics.   Running efficiently is very simple, but NOT EASY.  Here are some links to what we discussed: Joe's Ultrarunning Magazine's November article, "Central Governor and Stride" Joe's IRunFar article, "The Western States Killing Machine, Part Two: The Marble in the Groove" 100 -ups video with Joe Additional 100-up video Shaggy from Scooby Doo running model How to learn more from Dr. Joe Uhan Performance - get a running gait analysis! Joe's blog