to last as long as he has in top bodybuilding :
1- It helps if you're short and skinny to begin with .... usually these type of guys always look younger when they hit 40 and beyond, and don't deal with back pains etc ,joints as much as tall dudes later in life .
2- However, with that type of metabolism, you need to hit the gas like a maniac ...but don't have to do cardio as much as the bigger guys ( not doing cardio in your 20's and 30's save you from major wear and tear in the long run that often is overlooked and ignored when the body is starting to fall apart" ...
3- once you're jacked ,train light and with more machines as possible ....this is another MAJOR key as most pro Bodybuilders can't leave the ego out of the gym ...I remember Serge Nubret, in his 50's his body was basically the same as when he was younger he trained so light didn't bench press more than 225 lbs .
4- As long as you use drugs (as PRO level BB all the time ), and good food intake you can get away with light training and mediocre cardio sessions.....yes! is more a chemical "sport' than we think .
WoooSHHHHHHHHHHHHHHHHHHHHHHHHHHHH
When you fully understand this process, you'll understand that is training isn't nearly as important as many people think it is when you start out.
Has nothing to do with drugs.
Has nothing to do with all of the muscle that was built up over time.
It never was that important or complicated.
If you just hit the muscle and let time take its course, you'll build muscle to your genetics. Nothing more. Nothing less.
You don't have to be fancy, complicated, or train super heavy.
People new to training just don't want to believe it but it really is 80% nutrition and 20% training.
Drugs or no drugs. New to training or training for a long time.