I’m injury free but not sure which 10/20/L split I should go with.
I am with Dan, we need more info to properly guide you. That being said, the template that would work best for you will likely be the one you will be able to adhere to. Don’t pick the 4 day/ wk if you’re busy and have a demanding job and a young family. Pick the template that fits with your lifestyle and adjust from there. Just because you start with a 3 day, doesn’t mean you can’t jump to a 4day when your schedule changes, or vice versa. You just need to know how to properly plan things when the time comes to make those changes