When I first got injured, I was such a mess I could not even do yoga. I started going to a senior yoga class at our community center (and I am in my 30s!!) where they do very very gentle stretches while seated in a chair, so you don't have to get up and down off the floor or lower your head below heart level. That was all I could do for several weeks. I can do regular yoga now but have to avoid very intense poses.

Then I progressed to walking VERY slowly around a track. At first I could only do 15-20 minutes at a time. I just did as much as I could every day and stopped when my head started hurting. Now, after several months, I'm able to go several miles at a totally reasonable [human] pace! I still walk almost every day.

If I had a stationary bike, I would try that, but regular bicycling makes me nervous about hitting my head now...

Whatever exercise you pick, just do a little at a time and listen to your body. Stop when it hurts, but try again in a few days.

Good luck!

Eowyn