The Rock The Rock is going to start his physical therapy today and he will be heading overseas in a month to start filming Hercules. Check out some of his latest updates on Twitter: Today?s AM cardio plan:35min. Empty stomach. Average heart rate 135-1555 weeks out & prepping: HERCULES #ShreddedAnimalMuscle ;) ? Dwayne Johnson (@TheRock) April 18, 2013 Workout #1 starts now. AM cardio. These machines are gettin? their ass kicked. Cue music..#BackInBlack twitter.com/TheRock/status… ? Dwayne Johnson (@TheRock) April 18, 2013