ever hear of Piyo classes?

yes.... there are combination videos too... just google it if you have not already :)

I like both and, depending on your goals, one may fit your needs more than another.  I am not a professional practioner of either yoga or Pilates, but, often make referrals to therapists based on a persons needs.  So this is how I look at it...Pilates is a very structured program that is by design progressive.  That is, the tools that Pilates developed help you develop the strength to be able to do the Pilates mat routine.  So when I see people that have significant  injuries, weakness, or limitations I will often suggest working on Pilates first then moving to a Yoga program.  Yoga can be progressive, but, you will need to work closely with a practioner or start with a yoga therapy program.  BTW you need to be cautious with jumping into a pilates mat video or a yoga video or group classes because they presume that you are healthy.  I generally discourage people from pursuing Pilates mat based exercises if they have neck injuries.  They would be better off working on the reformer with neck support.  I would also suggest that knee or back injury sufferers work with a trained practioner as they start either yoga or pilates. 

I would also suggest that Pilates borrowed a lot from yoga and many of the positions in Pilates are similar to some yoga asana/poses.  He just had a very good idea of how to get from point A to point B.  I also would suggest that Pilates is secular and that yoga can and often does have a spiritual/lifestyle component.  That may be good for some people and turn others off.

Purists of any of these techniques have their reasons for sticking to one or the other...but...I believe that good movement therapists work with the person and develop a program that is unique to each person's body, mind, and goals.

With regards to your actual question, PiYO is one that I have seen listed in classes and I recall that there is a program that uses Tai Chi, Yoga, and Pilates.  Not sure if there are videos.

I regularly do both. Pilates gives me toned abs like nothing else and great posture. Yoga strengths my thighs,  back, shoulders and arms like nothing else and stretches back and limbs for great flexibility.. The Les Mills class  "Body Flow" is a great example of a Yogalates class that incorporates both. I also do Ashtanga, Power Yoga, Vinyasa Yoga, and mat Pilates for a great variety of body and mind discipline.  I recommend it to anyone who can or to find a personal trainer experienced in them  who can help you with an injury. For me, Pilates and Yoga are insurance against injury.

Of course you can do them both!

There are some "Yogalates" or "Fusion" type classes in many studios that use Yoga warm-up and cool-down and Pilates core workouts.

Depending on the skill-level of the instructor, this can truly give students the best of both worlds.

I wrote an article about Differentiating Yoga and Pilates that might clarify why they are frequently referred to as "either/or".

I also had a car wreck that injuried my upper back about 5 years ago.  I , too, went to physical therapy, etc.

This summer I broke my left big toe and landed with my hands forward - as if in a push-up.  I seemed to have jarred something in my back again.  It does not seem serious but very aggravating at times with pain and headached.

I am new to Gaiam.  When I was younger - in my 20's I practiced some yoga.  Now that I am in my late 40's - I was wondering if you might recommend some exercises  and/or sources to get me on the right track.

Thanks,

mzivy