I'm curious if you started experiencing vertigo, or more of it, after the GK. I'm still watch and live, and earlier described how I cope with exertion and lightheadedness, especially while exercising in whatever form. My experience with the dreaded spinning vertigo is rare, and I can count the times I've faced it on one hand. It's amazing how riding a bicycle seems, for me, to counterbalance the short-circuiting that can happen with the tumor fastened on the vestibular nerve. I really appreciate that, and noticed it has the same effect on you.