Something a new trainee to lifting learns, usually with-in six months, is that strength is not always transfered from DB's to BB's on a equal ratio. BP/inclines come to mind. That can apply to lat machine pulldowns to doing chins. The nautilus machines have a poor strength transfer when going back to regular BB/DB training, in some cases a few men have become weaker in their favorite free weight lifts, at first. Weither preforming one handed DB rows or both hands together will not make a difference. As with one of my training Bud's who does one arm side presses with a 200lb DB, he couldn't come near doing a 400lb overhead BB press if someone was holding a gun to his head. This all might highlite the importance of training with both DB's and BB's for a complete muscle building/strength building workout. Both are very important.
Why this transfer from DB's to BB's is lacking I do not know. I could guess, but that would only be a guess. I'm sure someone who comes to this site could offer some information on this. I'm sure there are hundreds of college or private research groups studies, mostly funded by government grants, who have an answer. Good Luck.
