when im doing chest workout i usually do about 6 sets at around 8 reps each on flat bench and same on incline but if im pumped i could get in around 8 sets,same goes for my days for curls,, i could do 9 sets at 6 reps then dropset after each,according to him thats all unecessary, and should be a warmup set or two then a working set, can someone explain,,