Americans today spend 92 percent of their time indoors, and their physical and mental health are suffering. Use this three-number formula to make yourself stronger and happier.

More human beings are more comfortable today than at any time in the history of our species. And sure, comfort is nice, but what if we actually have too much of it?

New research is finding that people can live happier, healthier lives if they push themselves outside their comfort zones.

American journalist Michael Easter says athletes and regular people can thrive by overcoming adversity and embracing discomfort, like trekking through the wild

Carrying weight for distance — or rucking — is part of the human design and it can keep us fit and healthy

After 33 days in the backcountry — lugging an 80-pound pack through forests and tundra, spending each night outdoors in a tent — Michael Easter says that his reunion with running water almost brought him to tears.

In his new book, The Comfort Crisis, Michael Easter investigates the connection between modern comforts and conveniences and some of our most pressing problems, like heart disease, diabetes, depression, and a sense of purposelessness. Turns out, engaging with a handful of evolutionary discomforts can dramatically improve our mental, physical, and spiritual wellbeing.

I recently found myself standing in the Arctic tundra, about 120 miles from civilization, in Kotzebue, Alaska, with half a year’s worth of dinner—100-plus pounds of caribou—strapped to my back. Gnarled four-foot antlers burst from the top of my pack, and my shoulder straps felt so weighty that I thought they might slice me lengthwise into thirds. I was up there on a backcountry hunt, and all I needed to do was carry my meat back to camp. Thing is, the five-mile slog was uphill and across a savage landscape that existed in an ice-cream-like state, all spongy layers, dense moss, mucky swamp, and basketball-sized tufts of grass. No easy path.