Actully, HGH has done the opposite. If you think about Bonds, Clemsns, Romanowski, Seau (yes), etc...those guys maintained and elevated their performances late in their careers. At 40-ish.
Boxers don't have to be on a baseball/football type program where they have a long season.
Here's Vargas' roid body:
Boxers don't have to be on a baseball/football type program where they have a long season.
Here's Vargas' roid body:

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