This Is What Happens to Your Body on a Thru-Hike

The secret to ultimate fitness isn’t all that complicated—just spend a month outside, hiking eight hours per day. Kyle Boelte breaks down how his body evolved into an efficient, fat-burning, testosterone-fueled machine over 29 days on the Colorado Trail. This summer, my wife and I hiked the Colorado Trail, a 486-mile, high-altitude trek from Denver to Durango....

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