I think they call it analysis paralysis. I am as guilty as anyone of this... Hmmm, if I do hill sprints Monday, will I be recovered to squat on Wednesday.
I say just do it. You will adapt to just about anything.
Brooks Kubik has a piece in his DINOSAUR TRAINING book about a young untrained guy forced to work in a lumber camp for a year at the point of a gun. After the first day, he wanted to die and the foreman with his sidearm was the only thing getting him back to work. There were no chainsaws, no engines of any kind. Meaning he had to do all his work the HARD way... EVERYDAY.
The point was that he came back 20-30 lbs heavier, stronger and meaner as a result. He wasn't concerned with recovery, post-workout nutrition, frequency etc. He just WORKED. So hit the bag. It's a great workout... You won't be sorry