I saw Mats up close at the USO and he is still very trim.
Some of the elder Argentines, maybe, not so much.
So I think it depends a good deal on the person (and possibly how hard they partied in their early years - that can catch up with you if you don't take some remedial measures).
"Before and after the match you are the same, no?" - RN
"Pain is only temporary. Victory is forever." - RF