Are you dipping the side of your body when you do the DB Rows? If so then you’re probably get a lot of assistance from swinging your whole body up. Next time you do DB Rows start with that side of your body angled up and only allow your arm and lats to stretch down, then pull up using only your arm and lats w/o swinging your whole body.
If that’s now what’s happening then I’m at a loss.
Male: 51 years old
Bench Press 240 lbs. @ 178 lbs. (12 July 2012)
Power Squat 390 lbs. @ 180 lbs. (10 November 2012)
Deadlift 390 lbs. @ 180 lbs. (27 November 2012)
Total 1020 lbs. (finally made it 16 July 2012)