lower back pain question
Hello,
This may be a shot in the dark, but I have been doing NROL for awhile now. I did the break in, FL1, and now in the middle of FL2. For the last month or so, everytime I do some swiss ball crunches, I get some discomfort in my lower back. I feels like a deep bruise. It doesn't hurt any other time (squats, DL, bending over, walking, etc.) and I know I didn't do anything to get a bruise there. The only thing I can think of is sometimes when I do a lunge and my form is not perfect, I feel a tightening and pain right above my tail bone. But the bruise is a little higher than the tail bone. Has anyone had a similar experience? I'm not sure if the workout has caused this or it is something entirely different. Thanks.
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