This is so foolishly incorrect... Look at me, I'm in my 50's, I know everything.
I'd say the typical 35 year old could lecture you on technology until you're blue in the face and maybe you would understand 10-15% of it. I could lecture you on digital marketing/internet technologies for weeks on end, but you prob know it all, since you're 50 and all.
Exercise? Diet? Why would you take my advice,
everyone who is in their 30's looks like me, what do I know 
This is actually the product of calzones, brisket, and riding my mobility scooter around Walmart. In about 3-4 weeks, I'll show you the progress I've made, gonna make that version of me look like a slob. Oh yea, I've had 3 spine surgeries in the last decade, what's your excuse, you're 50? But weighing 210 and getting your body fat % under 10% is easy stuff for any mid 30's dude, ask your local neighborhood NFL Free Safety about it.
The way you remember it, you were prob a bodybuilder in your 30's. Matsuki could beat up Floyd Mayweather in his 30's. Thorn prob passed on an NFL contract to be a potato farmer.
FTR, my metabolism slowed down dramatically in my late 20's and I had to make some serious adjustments. When that happens again, I'll do the same.
Oh yea, anyone who can't modify their diet or is fat must have an eating disorder type problem, similar to that of a drug abuser, alcoholic, or gambler. Interesting take, I like the excuse making... Yet every older dude on here calls millennials whiny babies, amazing.