DUP – The Most Efficient Way to Build Muscle?

flatwhite Muscle Gain 0 Comments

How to use DUP to build muscle… DUP may well go completely against the way you’ve been training or how you have been told to train to build size. DUP is pretty much the antithesis to the typical bro split. Rather than trashing a muscle group once per week you will hit it multiple times. I believe that using the …