"Everybody wants to be a bodybuilder, but nobody wants to lift no heavy-ass weights." - Ronnie Coleman I have gained quite a bit of muscle mass after building out a home gym during covid. I'm no scientist but following the Reddit PPL[1] workout and eating lots of protein did the trick for me. [1] - https://www.reddit.com/r/Fitness/comments/37ylk5/a_linear_pr...
I've been doing starting strength for about 14 years now and I can bang out a session in 30-45 minutes.