Hi.
I have been doing the GB foundations for a year and because of a pre-exisiting slipped disc in my lower back, I have been struggling with the MN and SL progressions.
I have been doing two days with core and two with upper body, but now I'm thinking about dropping the MN and SL progressions for a while, since they seem to make the pain worse., and do three days with upper body + FL. I'm also planning to focus more on the stretching courses (TB and FS) to increase my mobility in the progressions I'm struggling with.
Will the lack of MN and SL training do much harm to my progress in the other progressions?