Christine - Walking in the pool is great exercise. No DVD needed. Jumping jacks, skipping, etc, is also worthwhile. Also, when you walk the dog, concentrate on holding your lower abs in (like you're trying to zip up tight jeans). Those muscles support your lower back. The more you can hold them in, the better your back will feel.

Christine, I haven't really started excersising at all. I did last summer and what i did was walk and I started out SLOW. I lost 35 pounds in 6 weeks. I am planning on starting that up again as soon as the snow quits(we have a snow warning for tonight) I tried the biggest loser tape 1 time and barely made it through the first 5 minutes.