1. By: Jessica Kane

2. Shake Weight Ads  The shake weight is a 2.5lb spring loaded weight originally made for women to build lean muscle without the bulk.  Original Shake Weight Ad Original Shake Weight Ad  Introduced a 5lb version for men promising muscle buildup.  Shake Weight for Men Ad Shake Weight for Men Ad

3. Claim  Using the Shake Weight for only six minutes a day is enough to get you lean and toned arms.

4. The Science  Dynamic Inertia: Dynamic Inertia works the muscles in the arms, shoulders and chest by constantly engaging the muscles which results in increased upper body muscle activity by more than 300% compared to traditional free weights.

5. The Study  A “well-documented” scientific study involving the Shake Weight technology was conducted by Dr. Daniel Cipriani. Professor at the department of Exercise Physiology at San Diego State University  Used EMG monitoring of muscle activity during use of the Shake Weight™ compared to that of similar size dumbbells during traditional dumbbell exercises. All the major upper body muscles were measured. The study revealed that the Shake Weight™ causes over 300% more EMG activity than traditional dumbbells of the same weight.

6. What We Found From Other Research  Shake Weight claims that they have a well documented scientific study but fail to provide it.  Shake Weight is compared with the use of a standard 2.5-pound free weight. A traditional weightlifting regimen for toning arms would gradually increase the weight well beyond 2.5 pounds.  It is hard to measure their claims of working out just 6 minutes a day.  Contradictory advertising: Claims to keep women leaner while making men bulkier.

7. Conclusion  Doesn’t really work better than regular training.  Dynamic inertia is still unclear to researchers.  Without the right diet, no results will be obtained.