Zocchi told fans to tag a "mate who wants the workout to make their arms look like horses legs".
The trainer has worked with the Aussie actor on several movies and teamed with him again for the filming of the upcoming Avengers flick.
"We probably start about three months prior to shooting. So that's when we do our hard work. So basically, when we're shooting, it's just about maintaining it," he told KIIS 101.1's Matt and Meshel in the Morning earlier this year.
He said Hemsworth trains once or twice a day with the focus on "old-school body building" and basically zero cardio.
He says they never train for "over an hour at a time".
