Everyone says people who work in the trades have nagging to serious physical ailments from the years of physical abuse and strain from their work. It's a huge detriment to the career. People warn yea, the money is good, but you'll be shot to hell by age 50. Yet, no one seems to be worried that people who work out regularly will suffer the same fate.

What are your experiences? Will someone who is active for 30 years from age 20 to 50 experience the same physical breakdowns as people who work in the trades from age 20 to 50?