Careers based around strength

[Dragar]

You will really limit yourself if you look for a job with strength the only requirement

Develop a good trade that is physical (fitter, welder, electrician, scaffolder) - you'll be developing useful skills as well as having a physical/active lifestyle, with much bigger earning potential than purely unskilled strength work. If you do well you can run your own company or manage in a bigger organisation, which gives you something to do when your body isn't as young and strong anymore.

The other option is to work as an operator on some kind of big plant - oil rig is a great example, but refineries and other processing plants aregreat too if you can get it. Always look for industries with the higher money though.

Offhsore oil and gas > minesite > onshore refinery (oil, alumina, nickel) > non-resources

Getting in is the tough bit, once in if you work hard and have half a brain you'll do well. If you are willing to work in remote locations the prospects are naturally better.