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Category Archives: Endurance Training

Navigating Aches and Aging on the Best Trailrunning Route in the World

A few years ago, I crossed an unseen boundary and entered the land of middle age. The shift came slowly, then abruptly, and there I was, at 48, the new guy in a place whose inhabitants talked about poor sleep, unfaithful bowels, and watching soccer instead of playing it. I adapted to these strange ways […]

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The Science Says a Sub-Seven-Hour Ironman Is (Sort of) Possible

On June 5, four of the world’s greatest long-distance triathletes will take aim at a couple of those round-number barriers we love to obsess about. There’s the four-minute mile, the two-hour marathon… and now, the seven-hour (for men) and eight-hour (for women) Ironman-distance triathlons. The catchily named Pho3nix Sub7 and Sub8 Powered by Zwift races […]

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How Kathryn Martin Staged a Record-Setting Comeback at 70

When Kathryn Martin stepped to the starting line on March 18 at the USA Track and Field Indoor Masters Championships, the feeling was familiar and foreign at the same time. Although her name appears next to 23 American age-group indoor and outdoor track records—11 of them world records—Martin, 70, hadn’t run around an oval in […]

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Untangling Running’s Shoe Cushioning Paradox

Over the past four years, a new breed of heavily cushioned running shoes modeled on Nike’s Vaporfly line have rewritten the road-running record books. Soft-bottomed shoes, it turns out, can be exceptionally fast. But the hot new debate about the Vaporfly’s performance advantages has managed to push aside an older conundrum that should be of […]

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Mount Hood Has Two New Speed Records. The Guy Who Set Them Wore Short Shorts.

On April 24, Jack Kuenzle, 26, summited and descended Oregon’s 11,254-foot Mount Hood in record time: 1 hour 31 minutes 31 seconds. The route’s 5,254 feet of elevation gain included an extended technical section involving a narrow ridge and a steep chute. He beat the existing fastest known time (FKT) by 13 minutes. His ascent alone—1 […]

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Tommy Rivs’ Cancer-Free Return to the Boston Marathon Was Beautiful

Alternating bouts of jogging and walking, Thomas Puzey—widely known as “Tommy Rivs” or simply “Rivs”—made his way along Boylston Street toward the finish line of the Boston Marathon on April 18. Flashing a wide smile and waving to the crowd, the Arizona-based runner celebrated his return to the site of his fastest marathon. Five years […]

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Why Cyclists Can Handle Heat Better Than Runners

Something is always lost in translation from the lab to the real world—a fact that’s captured in the concept of “ecological validity,” the extent to which the conditions in an experiment match those you’d encounter in the wild. One way around this problem is to skip the lab entirely and search for patterns in naturally […]

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