4 Expert Reviews
"If you are a workout guy, it reminds you of things you already know. That you can push your body and yourself far further than you think." - Cory Booker
"It's hilarious." - LeBron James
"What's it like to train with a Navy SEAL in winter in New York for a whole month? Featuring the truly remarkable American hero David Goggins." - Marc Andreessen
"George Foreman once gave me great advice. When I told him my husband ran 100 miles non-stop he said, 'Sara, don't try to understand a man like that. Just love him.'" - Sara Blakely