It's certainly possible for elderly people to maintain a high level of fitness through intense training. But some of them are heavily geared. I see guys at the gym or at endurance races where physique and performance are obviously not natural. And I'm not judging them, maybe the tradeoffs are worthwhile?

Steroids to keep your body strong.

Antidepressants to keep your brain young.

Laxatives to more easily get rid of your fast food dung.

β-Blockers for making sure your blood pressure isn't wrong.

And of course deodorant: fresh as a daisy, even without a shower because you were too lazy!

Pharmaceuticals, for when you just can't.

A hand/chest mounted device to conveniently inject those at the right time would be great :D

There are positive outcomes from creatine and l arginine studies; but also some hormone stabilization post 35 too.

Testosterone, yeah. Many say it's much better than wasting away for a decade longer.

which is exactly what I will do at that age.

Where can I buy the brain steroids?

Same place as the dick pills!

Get prescribed Adderall

Good luck with that