a) I'm a noob, have your grain of salt ready
b) I often do cardio on days in between my weights days (also total body). However, my cardio sessions are like 20min, 30min tops.
If you're doing serious endurance running, it might get tougher to run before, or after, a leg day. And
every weight day is a leg day!
And you could also just give it a shot and see what happens.
