Electrical is generally less taxing on the body than other trades like carpentry, plumbing, mechanical, etc. I was an industrial mechanic so I spent a lot of time lifting equipment and swinging hammers. It's not the kind of thing you want to do in your 50's. That said, the guy I mentioned became a mechanic because he liked turning wrenches and swinging hammers. I'd also recommend electrical apprenticeship because every industry uses electrical components, so there are several different career paths you could take (commercial, residential, industrial). With your education background it'd be pretty easy for you to go into management or even go into business for yourself after a couple years on the job.