Extreme Shoulder Training – Complete High-Intensity Superset Workout is so effective because you push yourself to your limits and beyond every time you train, regardless of how much weight you are moving.
The focus here is not weight, but rather fully fatiguing the muscles and creating the biggest possible pump. By doing so, you are training like a bodybuilder, not a power lifter, creating as much trauma in the muscles and stimulating hypertrophy as a response.