If you think running is boring, we dare you to take class with Erin and report back. You’ll forget all about the dreaded ‘mile day’ in junior high gym class and completely rethink the way you run. Erin is a mother, a marathon runner, and as tall as she is competitive (very). Whether she’s parenting or helping people find joy in their fitness routine, she always puts others first. Her one guilty pleasure? MTV's The Challenge. If anyone knows how to get her on that show, help a girl out. Her home studio is STRIDE Irvine in California.