I am certified through Power Pilates. They emphasize classical Pilates training with a scientific base in modern biomechanics and fitness/training research. The commercial link below was broadcast nationally yesterday on ABC. It demonstrates interesting and challenging reformer exercises for professional and amateur athletes. There are so many great options to strengthen and stretch on Joseph Pilates' Reformer.
http://www.powerpilates.com/email/commercial/
http://www.powerpilates.com/email/commercial/