Including:

Shake Weight Dumbbell, Workout DVD and English instruction manual.

Based on a completely new workout technology called Dynamic Inertia, which ignites the muscles in your arm, shoulders, and chest.

The Shake Weight increases upper body muscle activity by more than 300% compared to traditional weights

Works out your entire upper body in just 6 minutes a day

The Shake Weight causes more EMG activity than the traditional dumbbells of the same weight. This is a result of the unique motion of the exercise, isometric contraction of the entire upper body required during use of the Shake Weight and the rapid pace of the muscle fatigue caused by one unique movement.