"Yoga and Pilates can be a great way to exercise, but it's difficult to keep up without some kind of fitness aid to help you along. Enter NewU Fitness First: Mind Body Yoga & Pilates Workout on the Wii, which is fully compatible with your Wii Balance Board and Wii Motion Plus peripherals. This program allows you to perform each step of its Yoga and Pilates workout at your own pace and with ease. The benefits of these exercises mean that women and men of varying ages are looking for ways to get healthy in the home. With the help of Fitness First, this new entry in the NewU brand of products offers a deeper level of understanding of the workouts than some similar titles provide. It's not all about stretching your body about though, it's about exercising your mind as well.
Cheapest I have found apart from Argos but that is no longer available as I phoned H/O