I still remember the look on the doctor’s face when I was four years old. He told my parents that I’d never be able to run. Not with this kind of asthma. Soccer was out of the question too. That one moment stayed with me. That single sentence etched a story into my body I would spend the next 30 yea...

If you’ve ever been told your asthma means you can’t compete, train hard, or push your limits—you’re not alone. I was that kid. At age four, my doctor sat me down and told me I’d never play the sport I loved most: soccer. My lungs were supposedly too weak. I should find something “less intense.” ...

When I was four years old, I was told I shouldn’t play soccer—and definitely shouldn’t run—because of my asthma. Fast forward 30 years, and I’m an elite ultrarunner who runs trails six days a week and lives right next to one of my favorite dirt trails. If you’re just getting into trail running—or...