When it comes to food, Hemsworth eats upwards of 3500 calories a day, but it's all "clean".
"It's basically six meals a day of just clean proteins and vegetables. And he does still have a little bit of chocolate here and there, I won't lie," he said.
While Zocchi admitted the star does live by the gym mantra "never skip leg day", he said Hemsworth did start pounding his upper body a bit harder after seeing the costume for Thor: Ragnarok.
"Funny story actually, when we did the fitting for Thor 3 we saw the costume and it was just sleeves and he's like, 'Alright we're doing arms and shoulders now - that's all I wanna do'," he said.
Earlier this month, Hemsworth made jaws drop when he posted a video of his intense workout routine with Zocchi on Instagram.
The gruelling video shows the 33-year-old actor doing everything from massive bicep curls to gasping for air as he crawls with bungee cords attached to him.
Ending their chat with the A-list personal trainer, KIIS host Meshel Laurie said what we're all thinking: "It sounds to me that he's still got a life but it's hideous."