I am able to use a 15kg bar sitting down. I am able to move my hands and arms behind me as in the video, but my lower back does start to round, which I can feel. Is this exercise aimed at inceasing a stretch through the pec muslces, front delt and over all increasing the stretch across the chest. There seems to be a strength component relating to an isometric hold that engages the scapula in a retracted position, is this again what we are aiming for in this?
thanks for any insights.
bret