Weak back? Bad posture? Want to start walking upright and proud? Then this serious JNL Fusion back workout is for you! All of your major back muscles will be strengthened & toned, while you blast off ugly fat with the signature JNL FUSION super spiking cardio bursts. JNL designed this workout to target your deepest core back muscles, to give you a sexy toned backside! JNL's approach to instruction the class will keep you motivated and coming back for more of her "full on back attack “workout!