Amazing stuff! Congrats to Mr. Kiptum and Ms. Hassan on their victories.<p>Marathon runners don't get enough credit for how insane their sport is. The pinnacle of easy to learn, hard to master.<p>At two hours, the pace is around 13 mph (21 kmh).<p>For perspective, go to your local gym/sports club, hop on a treadmill, and crank it to the highest speed setting. Chances are good that it'll top out at 10 mph and you'll be pressed to run that for more than a minute.<p>Now, add 30% more speed to that and you're close to what these folks crank out. For hours.<p>Absolutely mindboggling.