My question is:
Should you work out with sore muscles?
Is there any reason not to?
Is it better to wait until the soreness has passed?
No u shouldnt workout with muscle soreness or technical term for it DOMS delayed onset muscle soreness...recovery time is jus as important as th workout itself if not more not letting ur body rest can lead to overtraining and injury its a common question which really is complicated if u want to knw wats and ifs and why's..workout what group of muscles is not sore...to give ur body th rest it needs..using body splits enables u to workout specific parts of ur body more often while allowing it to receive adequate rest
There is nothing wrong with doing ab workouts if there sore, its common especially if your transforming your abdominals to a 6 or 8 pack. Now if it was your legs and you can barely walk then I would say yeah sometimes a good 3 days to a week off recovery helps. But, its your abs, I would say your doing great no pain, no gain!
General rule for myself: if muscle fatigue and soreness from a previous workout is noticably affecting my performance in a current workout, or even day to day routine, its a good idea to give it a rest. If its a little tender, just dont focus heavily on that muscle. If you have prolonged soreness in any muscle, it might be a good idea to take it easy as well, and above all, listen to your body!