I should point out that my leg day means Leg day (a); since it's split into 3. I have a 14-day split going which is proving interesting so far, but it gives me a chance to completely obliterate a muscle group and then let it fully recover for almost two weeks, whilst the muscle is used as a secondary mover for other exercises, keeping it on its toes, so-to-speak, at the same time.
Today:
Jeez, my legs hurt. I struggled my way through 30 mins of cardio tonight, with really sluggish, heavy, dead legs. I managed to get to 30 mins, even though I was considering throwing the towel in at around 10 mins. I would have been happier with 45 mins at the minimum, but am content with 2/3 of that time for today at least. It should get easier as I get more used to the new weights routine. It also proves the new routine is having the desired affect.