Just look at the evolution of male movie stars. A handsome face and slim figure used to be all that was required (Clark Gable, Paul Newman, Peter O'Toole). Today the men have to be jacked (Brad Pitt, Tom Cruise, George Clooney).
You can bet that to be a male star in Hollywood requires a personal trainer and a lot of work.
I had a similar image (though different individuals) in mind when I wrote my post. Older leading men were also in good shape, notable in a number of roles when they appeared shirtless or in short sleeve shirts, but rarely did they get to the extreme leanness (and muscularity) that modern (2010s in particular) leading men seem to be aiming for.
You can bet that to be a male star in Hollywood requires a personal trainer and a lot of work.