'…when you're shooting a film like Magic Mike, and you're doing dance routines for two weeks at a time, you have to peak every day. So that became kind of crazy. We had a gym in the parking lot, and we'd all be lifting weights on set all day.'  –  actor Joe Manganiello , performing in the film Magic Mike . It's not unusual for actors to undergo drastic changes in preparation for a role, including gaining muscle and losing body fat for that shredded look. In fact, this is becoming the norm in Hollywood.

https://lens.monash.edu/@medicine-health/2023/08/09/1385989/extreme-hollywood-body-transformations-have-become-standard-preparations-for-film-actors-but-we-need-to-consider-the-consequences

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