So I've come to you to get some advice. RDLs and deadlifts tend to cramp up my lower back, in particular on the left side of my lower back. Yesterday, for example, I was doing some barbell complexes (it was a day off from heavy lifting) and I failed my third round because my lower back cramped so bad. Granted, this was the day after a full body workout that certainly exercised my lower back.
When lifting heavy, whether with regular deadlifts or with RDLs, I definitely feel a lot of stress on my lower left back.
Any suggestions on what I can do to minimize this problem. I am not a particularly flexible person, and I do use a standard barbell (I work out at home) with ridiculous numbers of 25lb plates on it when I DL, so technically my DLs are deficit deads. But that should have no impact on RDLs, which tend to shred my back even more.