Abby Hall and Caleb Olson won the Western States 100! Read our 2025 Western States 100 results article for the full race story, and watch Abby and Caleb’s post-race interviews.

Running and the Heart 10

Figure 10. Faster Vasaloppet cross country ski racers and racers who have competed more than five times both have a significantly increased risk of cardiac arrhythmias. Image from Andersen K, et al. Risk of arrhythmias in 52 755 long-distance cross-country skiers: a cohort study. European Heart Journal, 2013.
By on May 14, 2018 | Comments
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Running and the Heart 10

Bryon Powell

Bryon Powell is the Founding Editor of iRunFar. He’s been writing about trail running, ultrarunning, and running gear for nearly 20 years. Aside from iRunFar, he’s authored the books Relentless Forward Progress: A Guide to Running Ultramarathons and Where the Road Ends: A Guide to Trail Running, been a contributing editor at Trail Runner magazine, written for publications including Outside, Sierra, and Running Times, and coached ultrarunners of all abilities. Based in Silverton, Colorado, Bryon is an avid trail runner and ultrarunner who competes in events from the Hardrock 100 Mile just out his front door to races long and short around the world, that is, when he’s not fly fishing or tending to his garden.