John Krasinski packed on main muscle to star in 13 Hours: The Secret Troopers of Benghazi. The actor did brutal two-a-day exercises, 5 instances every week to get SEAL-fit in simply 4 months.

Krasinski’s coach, Jason Walsh, estimates that his shopper bought all the best way down to five p.c physique fats to organize for a pivotal shirtless scene in 13 Hours. 

However whereas Krasinski put in plenty of work for the intense position, he hasn’t modified his patented goofball persona one bit.

Try this unique behind-the-scenes clip of Krasinski’s Males’s Well being cowl shoot for proof. The actor cracks the identical type of wiseass jokes that his most iconic character, Jim Halpert, would’ve instructed on The Workplace.

“What I do to organize for canopy shoots usually is . . . nothing,” Krasinski deadpans.

Watch the video above, and don’t overlook to choose up the January/February 2016 problem of Males’s Well being, digitally out there NOW by way of Apple’s iTunes Newsstand.