Description:Extreme athlete Marshall Ulrich and his wife Heather discuss how they keep their marriage healthy despite Marshall's sometimes dangerous pastime. Ulrich has run more than 100 foot races averaging over 125 miles each, completed 12 expedition-length adventure races, and climbed the Seven Summits. His transcontinental run of more than 3,000 miles was the equivalent of two marathons and a 10K every day for 52.5 days.(1:31)