How Zac Efron got incredibly ripped for the 'Baywatch' movie

Instagram/zacefron

Zac Efron is more ripped than ever.

The 28-year-old actor has been training for months to prepare for his role in the upcoming "Baywatch" movie — filming now and out summer 2017 — and it's clearly paid off.

Efron has been posting photos on his Instagram to show off his progress and share some secrets. He also wrote about his strict diet on Twitter.

Check out some of his intense regimen below:

First things first: lifting weights to work out his back and biceps

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There is a "Ninja Warrior"-like training course on set for Efron and his costar, "The Rock," aka Dwayne Johnson, to work out on. Efron said that he's been training for "months and months" to reach this level.

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Efron and The Rock even got into a tire-flipping race on set. The Rock won.

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