One thing you can do without buying any adjustable dumbells (which doesn't cost much btw), is to just grip each dumbell so that your thumb and first finger are right up against the plate on the outside "side" of each dumbell. This creates some additional length in the side you twist, and so will give you some additional resistance. In any event, just twisting the dumbell itself throughout your standing reps will help to work that outside head more than you normally wouldOriginally posted by ManBeast
I like that one PC1, very similar to the standing curls I do, except I have no way of overloading the inside "side" of the dumbell. I'm going to find a way though!