When doing an exercise aimed at building the back, the activation of the biceps should be minimized. But this isn’t easy to do when you have overpowering arms that “take over” during back work.
I have an old lower back injury that I never treated and is now coming back to haunt me. I hardly have ‘overpowering arms’ but basically, rather than using my back to stabilize when lifting things I over-use my arms which has resulted in a couple of painful and limiting bicep tears. I’m in physical therapy now and the the focus has been to do exactly what these exercises aim to accomplish – strengthening my back so that I’m not over taxing my arms.
Source: T Nation