When it comes to getting in shape, most people focus on eating better, maybe exercising a little bit more. But what if there was another missing piece to that puzzle? 

That's the premise of the new book, "What Doesn’t Kill Us - How Freezing Water, Extreme Altitude and Environmental Conditions will renew our lost evolutionary Strength."

Journalist Scott Carney delved into a technique called the Wim Hof method, named after a Dutch health guru known as "The Iceman." Hof  claims that by subjecting the body to extreme conditions, he could teach people to gain strength and increase endurance. 

Here's a trailer for the book. 

We spoke to Scott Carney about the book. To hear the complete interview, click on the blue arrow above.