Do whatever is necessary if your surgeon advises you to exert effort for flexibility. Having been of reasonable height to begin with, you shouldn’t encounter too much difficulty achieving the desired height through limb lengthening. If I were in your position, I would commence weakening my legs if you haven’t done so yet. A 10cm extension is quite a decent accomplishment, and it will be significantly more agonizing if you neglect to prioritize reducing that excess muscle.
