A variant of starting strength is "StrongLifts 5x5", which comes with a great app (regardless of platform). My morning back pain has evaporated. The only thing

A variant of starting strength is "StrongLifts 5x5", which comes with a great app (regardless of platform). My morning back pain has evaporated. The only thing I'd say is to supplement basic strength training with a calisthenics (core) exercise & pull-ups after, say, a year-or-so. Personally, I don't think the basic strength training don't focus on functional strength enough, in the long run. I still stay away from things like CrossFit — I just know too many people who've hurt themselves doing that stuff, as they're really not strong enough to do these more advanced systems.