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The First 20 Minutes: Surprising Science Reveals How We Can Exercise Better, Train Smarter, Live Longe r
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In other words, typical hunter-gatherers are about as physically active as Americans or Europeans who include about an hour of exercise in their daily routine.
Daniel Lieberman • Exercised: Why Something We Never Evolved to Do Is Healthy and Rewarding

A Hunter-Gatherer's Guide to the 21st Century: Evolution and the Challenges of Modern Life
Heather Heying • 1 highlight
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When my colleague Dr. Aaron Baggish attached accelerometers (tiny devices, like Fitbits, that measure steps per day) to more than twenty Tarahumara men, he discovered they walked on average ten miles a day. In other words, the training that enables them to run back-to-back marathons is the physical work that is part and parcel of their everyday lif
... See moreDaniel Lieberman • Exercised: Why Something We Never Evolved to Do Is Healthy and Rewarding

“Humans really are obligatorily required to do aerobic exercise in order to stay healthy, and I think that has deep roots in our evolutionary history,” Dr. Lieberman said. “If there’s any magic bullet to make human beings healthy, it’s to run.”
Christopher McDougall • Born to Run
On a typical day, the Hadza engage in two hours of moderate to vigorous activity, like running, and several more hours of light activity, like walking.