I'm 157 lbs 5'10" . Low body fat and workout and have a slot of sport activities so I have muscle, but I'm still somewhat tiny because I can't put on more weight. I'm working on eating at a surplus and also want a better workout plan.

I kind of just do 5day isolation workouts, but recently I've been doing this:

https://www.t-nation.com/workouts/testosterone-boosting-workout

Yeah "t-boosting workout" sounds gay, but I've been enjoying the workout. It's left me on my ass a lot of times. Probably because the quick sets.