DECLINE SINGLE ARM DB PRESS
Working one side at a time works wonders for aesthetics and symmetry. The vast majority of people are more dominant on one side of the body. Personally, my left pectoral muscle has always been smaller than the right, whilst my left deltoid (shoulder muscle) has always been bigger than the left. Go figure, right? This is all down to my own unique biomechanics.
This chest press exercise will help fix the imbalance in symmetry for the pectoral muscles. Be sure to work your weaker side first, so that you don’t continue to over work the other. That way if you hit muscle failure before the set finishes on the weaker side, you will know to stop early on the dominant side. Keep this up for a couple of months and you should notice a more even balance in strength & size!