Hi Lana - I used to do Bikram and stopped after PD. I don't know about the oxidative stress, but it stopped feeling good for me. I used to feel great after class, then I started feeling really bad - sometimes I would have to lie down for a while after. I go to regular yoga sometimes now. Sadly, my ego gets in the way and sometimes I just do my yoga at home. My balance issue make me sad! I wish I could find a yoga for PD class.
Anyhow, I see that you are in SF - me too! :-)