"It's kind of embarrassing, but you do push-ups before a shirtless scene," Efron told MTV News as part of the MTV Movie Awards Takeover.
We've previously covered the big news that Efron doffs anti-trou (that's a shirt, by the way) in way more of the upcoming comedy "Neighbors" than you might expect. Still, what works for Efron might not work for everyone. Take, for example, co-star Seth Rogen.
"That literally never occurred to me until I was working with Zac," Rogen said on the pushup tip. "I saw him doing it, I was like, 'Wooooow!' That's what guys do! I do pushups before a scene, I'm just really tired and sweaty."
So while Rogen may not be heading to the MTV Movie Awards to accept his win for Best Shirtless Performance anytime soon, Efron has already been nominated once, for his top-off turn in "That Awkward Moment."
Even though Efron has abs for weeks, he's got some stiff competition in the God of Thunder himself, Chris Hemsworth. Back on March 7 Efron threw down whatever a gauntlet is for torso muscles (chest-plate, maybe?) with the following tweet:
If I beat Thor- I'm accepting the award shirtless on stage. #movieawards— Zac Efron (@ZacEfron) March 8, 2014
Though Efron swears he actually likes Hemsworth, and isn't trying to start a beef, he'll stick by the tweet.
"So I jokingly tweeted, if I beat him I'll accept it shirtless," Efron said. "Now I have to. I'm a man of my word. If I win, I'll do it."
Don't expect Rogen to join him in the audience if Efron does win — at least without doing a few push-ups, first.