Over the past couple years, I have had mild lower back pain (like 80% of the population), which was exacerbated by squats and deadlifts. Eventually I switched to deadlifting off boxes, and not squatting very much at all. Nothing serious yet, just a result, I think, of surrounding muscles being very tight. I started addressing the issue about a year ago, with myofascial releases, light stretching, banded mobility, standing desk, etc... and it made a world of difference. I was not pain free before starting GST a couple months ago, but it wasn't bad at all.
So now I'm feeling a bit more soreness in the mornings (but the back feels fantastic during/after stretching), and I'm wondering if it's a result of the stretch series and the multiple positions in which I'm rounding my lower back in the FS and MS series. I know we won't always feel 100% and this is part of the game, but I wondered if there were any recommendations to try to keep a straighter back in certain positions (pike, pancake, etc...) instead of simply trying to reach as far as possible and get the head to the knees/toes. As long as the discomfort isn't too great, would you just keep at it as instructed, or is this issue a common one with tight people?