A guy in this story about hiking the Appalachian Trail ate a high-fat, junk food diet and still lost 40 pounds during the hike. Lots of walking does burn the calories.
http://www.outsideonline.com/1910006/i-hear-america-slogging
“A guy in this story about hiking the Appalachian Trail ate a high-fat, junk food diet and still lost 40 pounds during the hike. Lots of walking does burn the calories.”
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I imagine a hilly terrain adds to the calorie burning power.