These ab ripper x exercises make up one of the best abdominal workouts around. It focuses on core strength by using the movements of your hips and chest. The ab ripper x workout contains simple exercises which produce painful, yet rewarding.
P90x Exercise Program - Complete P90x Workout Guide
P90x Exercise Program - Complete P90x Workout Guide | HubPages
P90X2 Ab Ripper: A Summary & Evaluation
P90X2 Ab Ripper-An Honest Evaluation-One Strong Southern Girl-I'll explain every exercise in this P90X2 routine and help you decide if this 17-minute workout is worth your time.