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'The rear delts (known as the posterior deltoids) are the muscles on the backside of the shoulders,' says Macy Pruett, CPT, a ...

Absolutely nothing gives you that jacked appearance faster than packing mass across that Top Shelf. Stronger shoulders also help in just about every exercise you can think of. Most people want to ...

and the plank with shoulder taps. Keep reading for examples of some effective arm exercises for building muscle mass. The ...