A man completed 365 marathons in 365 days.

This insane feat was accomplished by Stefaan Engels, a 49-year-old asthmatic from Belgium. That's 9,569 miles of running, in 7 different countries!This shattered the previous record of consecutive marathons held by Japanese runner Akinori Kusuna who ran 52 marathons in a row.

His secret? He's not a fast runner, and he didn't over-exert himself on any of the races, keeping his heart rate low. Still, he did run, he didn't walk. His best time was 2 hours and 56 minutes. Engels has been running marathons since he was 25 years old. In addition to this record, he also holds the Guinness World Record for most Iron Man triathlons in a year.