Anyone of you experienced this problem before?
Whenever i do crunching movements, either machine or unsupported, my abs will start to cramp up real bad after the 2nd or 3rd set and i cant continue the movement anymore. Hanging leg raises do not give mi the same problem though.
I dun train abs regularly so it could be because my abs are weak. I have also heard people saying that supplementing with magnesium helps. Any other suggestions?