789. Tristin Colley, 2:25 Marathoner with ZAP Endurance

"It's not sustainable if you're not having fun with it." Tristin Colley ran her first marathon in 2019 in 2 hours and 40 minutes. Just four years later, Tristin she 15 minutes off that time, running 2:25 at the Chicago Marathon. Now, Tristi…