I worked most of my life after the military as a certified welder and fabricator in heavy industry. In the Union as a whole, the average number of retirement checks was right around 16. That's 16 months, at least for Millwrights who had done 30 years. I personally knew, well, I can think of seven right off hand, who passed away within months of retirement. You get so beat up, inhale toxic fumes day in day out, exposed to asbestos and chemicals, tendon and muscle injuries. The strongest, and fittest years of my life were from age 28 to about 32, when I was fighting (sport, and not professionally, just biker brawls and tough man comps) and taking steroids to put on weight and gain strength. After that it was down hill, and I seriously pay for the hard lifestyle I lived. I can't run air tools for more than a few hours, or the pain will keep me up all night. I get injured easily, muscle injuries, strains and sprains, I'm almost fragile at age 45. I have to be very careful. And I'm not some weakling, or hypochondriac. I think most hard construction jobs break you down.
One of my friends NEVER worked a physical job, ever. Always "paid to think". He has a bit of a dad bod, but he sure isn't fighting injuries the way I am. I am certainly physically stronger over the short term, but for most things in life, he is going to be better off in the long run.
I wish I could go back and talk to my younger self, and say, hey stupid. The day is coming when you are going to be hurting, all the time. Back off a bit.
If you are going to lift, my advice is to do it for health first. Strength and size will take longer, but you will be better off. Just my opinion.
I literally just hurt myself lifting, after carefully building up to some heavier weights. One step forward...