Embracing the process of running made Clare Gallagher an elite ultramarathoner — and a committed environmentalist.
Our copy chief and long-time endurance athlete shares the experience of his arrhythmia and recovery.
A long-term study links poor aerobic capacity with a significant risk for premature mortality.
Learn how to become the most resilient, confident athlete you can be, regardless of your physical fitness.
Ultrarunner Kilian Jornet talks about his love for racing in the mountains — and the commitment it takes to overcome your limitations and fears.