I’m not sure if you are still checking in on this or not, I hope you have since received better information than the answers listed here. I have had IIH for several years now, with papilledema. Mine was not contracted via weight-gain, but via medication. It was advised to me from the very beginning to maintain activity. Best options are light cardio, resistance like yoga, or Pilates, walking, hiking, etc. Jumping into a high Impact strain exercise or weights is not advisable without monitoring. All activity should be run by your dr. But I was told emphatically it is much better to keep movement in my body and stay active. I can vouch for that as before my shunt implant, i spent a lot of time bedridden, my weight went out of control. After surgery and working the exercise back in, my attacks have reduced significantly and my biggest battle is getting around the diplopia.