when you guys are trying to increase your reps for an exercise at a certain weight your stuck at, do you always pre-determine the reps your going to do for each work set? or do you try to do as many as you can hoping to get more then you would pre determine. 2 weeks ago I was bench pressing 150, I did pretty badly, 1x4,1x2,1x2. My concentration was probably off. Last week I did great I initially planned to do 5,3, and 3 but managed to do 3x5 with the last set a spotter helping me on. After the exercise, I felt kinda disappointed cuz I felt I has enough strength to do max for the first 2 sets but I held out because I wanted to do everything "by the book" (increasing reps by 1 every week). Today I managed to do 2x6 and 1x3, I should have asked for a spotter to help me with the last set but I thought I could do it myself so I didn't bother hehe

; but yeah are you supposed to pre determine right before you begin your set, or just do it naturally and focus on getting to max rather then the pre-determined rep.