The OP's very first post stated he was short, skinny and not very strong. How is discussing strength off topic???
Please don't confuse Crossfit crap with real strength training. Not the same thing at all.
I worked construction for many years, approx 15 years. Always considered myself a pretty strong guy, as did most that worked with me. Always liked being thought of as a "bull". Usually walked around at 185ish lbs at 5'10". Like most I worked out in my late teens early twenties. Stopped going after I got married, had a kid, got divorced, got remarried, had another kid. The whole time I always wanted to get back in the gym. Then in my early thirties I started going again and have been going steady for about 3 years. I made it part of my life/daily routine. I go early in the morning before work and it doesn't interfere with family time as they are sleeping then. Its a great stress reliever and I really enjoy it. I currently walk around at 210 lbs. and am considerably stronger than I ever was when I worked construction. My strength has been documented in a notebook and I am still surprised when I look back.
For those who think lifting heavy barbells isn't equated into "real world strength" are delusional. If you can deadlift 600 lbs, squat 495, bench in the mid 300's, overhead press your bodyweight, what "real world" tasks are going to give you trouble. I cant think of any. Mix in some cardio for heart health and conditioning and you'll be healthier than 95% of people who work physical jobs. Most of these jobs are doing repetitive motion movements all day long, not building general brute strength. I've done both.