I'm in the camp of trying it both ways and seeing what works best for you. If you find that after 2 weeks w/ no Sunday BL, that your Monday training you feel like crap, I'd add something small in Sunday evening. If you feel fine on your Monday workout without a backload Sunday, run with it.Also being said, if you find that you begin stalling on your Monday workouts, you could try adding in a Sunday backload to help give you the boost you need to push through a weight/rep/whatever plateau.