Zac Efron’s height is about 5 ft. 10 and The Rock’s is 6 ft. 5. Yet when the two appear side by side in “Baywatch,” Efron more than holds his own. That’s all thanks to a downright effective workout plan, which coincided with the Zac Efron diet. By targeting key muscle groups throughout his body—namely his abs, biceps, chest, and shoulders—the actor came a very long way in very little time. In the process, he gave new meaning to the word “beach body.”