I was wondering what people’s opinions are on working out even if you have residual soreness from the last workout. I try to train each body part 3 times a week, but sometimes after just one day of rest I am still sore. Especially my legs since often on the day off I do some cardio. Is it more effective to take 72 hours off rather than 48?
Work through soreness, and after a few weeks it should be gone, as your work capacity improves. And, in general, doing light workouts should help with recovery. It was not clear to me from your post does the cardio on off days help or makes matters worse.
If soreness persists, esp. in one specific body part (like hamstrings), it may be a sign of some kind of imbalance, so that body part is actually forced to do more than it should. In my case, hamstrings used to be sore all the time, but I managed to “cure” them thanks to Get Your Butt In Gear series. Pelvic Raises and similar stuff for a while did the trick.