Well ive noticed that for quite some time now, i workout with the same weights over and over, and really dont gain in strength. For instance, to elaborate, for chest i usually do a set of 70 dumbells for ten reps, then 75 for 8-10 reps, then a set of 80 for 5-7 reps (along with other exercises). However i have been doing the same amount of weight for quite some time now, almost five or so months give or take. Is there something im doing wrong? Shudnt i be going up in weight? Back when i started i remember stacking up higher weights weekly!