I have been working my way back up in lbs since hernia surgery last year. 2 weeks ago I pulled 475 for one rep and felt good. Last week I could only pull 455 for one and this week I couldn't get 455 all the way up. Is pulling once a week to much or should I lower the weight for reps for a few weeks and work my way back up? I was making steady progress and now I seem to be going backwards. Diet has been consistent for the most part as well as supplements.