I do physio when i'm online too, lol. Why not eh? It generally takes me about 30 to 45 minutes, depending on how motivated and commited i am to it at that given moment.
Yesterday i worked hard at physio and felt great b/c it was so gorgeous outside, and today and doing the same. So about 30-45 minutes for me, once a day tho, since i do it at around lunch and that seems to clear me for the day! If i feel crappy i'll do it twice.