Yoga always makes me feel better. Before I got pregnant, I went to this very "hippie", crunchy yoga class, complete with gongs and incense and chanting. I thought it was utter crap, and I still do, and sometimes I had to laugh quietly to myself. But at the end of every session, I'd walk out feeling amazing and relaxed yet full of energy and happy. I had to stop going when I got pregnant, since the instructor said the class wasn't right for pregnancy, and I haven't found a cheap enough prenatal class.
Last week, my husband asked me to promise him that once the baby came, I'd start going to yoga again, because he said he could see the change in me after yoga class, and he thinks it was really beneficial.
I have a pre-natal yoga DVD that I do sometimes, but it's definitely not the same as my weekly two-hour class. I do feel better afterwards, like my limbs are loose and my back usually stops hurting for a while.