On the first day of the CrossFit Games , after biking 12,000 meters, finishing 30 ring muscleups (in three and a half minutes), and maxing out his back squat , strict press, and deadlift , Khan Porter rowed a marathon. Despite the fact the longest he’d ever rowed, uninterrupted, was 5 kilometers, and his abdominals started cramping so badly he had to stop and stand for a minute and a half, Porter completed all 42,195 meters in under three hours. A few weeks later, the four-time Games athlete decided to do another marathon—this time on a ski erg . (We know, it’s masochistic.) Before he started puking (later he would realize it was from food poisoning, not exhaustion), he was on pace to break the world record for his age group. Inspired, Porter says he’d also like to run a marathon for the first time and do a double on the Assault Bike. Below, he shares his training tips for anyone considering an unorthodox kind of marathon . The 10 Best Workout Classes for Men: 2018 1. Invest i