So one of my arms is 0.5" smaller than the other
I've been always training with dumbells, but recently switched over to barbells hoping this would help me 'balance out' my biceps. My bicep on my left arm is smaller than my right arm. This is more than surely in part due to the rotator injury I had which has had me weaker in the left for a while. However I've been rehabing my rotator and even started training chest regularly, but now I have a smaller arm which is very lame when doing a double bicep shot lol.
A friend of mine told me that doing barbell curls will make the problem worse, to me it doesn't make sense as you are distributing the same load, but.. at the same time what he said kind of made sense, that the other arm will take the slack.. but does it?
With dumbells, I certainly had trouble on my left curls.
Need some advice on getting this sorted and no, I will not inject synthol.
Dumbbell work will force each arm to handle its weight independently (without assistance from the contralateral side).
Regardless, this type of imbalance is quite common in many trainers. Look at front double bicep shots of pros and you will notice this phenomenon in many of them.
This genetic difference also often transcends upper arms. If you look closely enough, you'll often notice minor side-to-side discrepancies in pectorals, abs, and quads.
Ronnie had maybe the best biceps ever in history, and even he had minor differences in shape and size.