The Push Up is an original Pilates exercises that strengthens the core and strengthens and tones the arms. By remembering to keep the inner thigh and gluteus maximus muscles engaged, the legs and butt muscles are able to help the abdominal muscles support the spine and pelvis in neutral. This is important for insuring that the back does not arch, which causes tension in the lower back. Visit http://PilatesOnFifth.com/video for more info. Now, Pilates on the Go! - Workout DVD is available from http://Shop.PilatesOnFifth.com