Join Tim Ferriss as he discusses his new book, "The 4-Hour Body." The result of an obsessive quest to hack the human body, it contains the collective wisdom of hundreds of elite athletes, dozens of MDs, and thousands of hours of jaw-dropping personal experimentation. The best-selling author of "The 4-Hour Workweek" fixated on one life-changing question: For all things physical, what are the tiniest changes that produce the biggest results?
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