Gaiam / Pilates: Intermediate Mat Workout - DVD (Used)Features: developing a strong core improves posture Details: Get back to basics with this revolutionary exercise regime based on the Pilates' method defined by health and fitness pioneer Joseph Pilates. This intermediate volume pushes the concept of developing a strong core and improves posture by strengthening the abdominal and back muscles. Because it is not a high energy, high impact aerobic endeavor, this type of program is portable and practical