I've noticed this after the past couple of months of training. It seems i can't seem to get these weights up when i'm doing them. I try to increase 5-10lbs weekly but it just seems its not going anywhere. Everywhere else seems to be progressing just fine however. I was wondering if you guys could make some suggestions that would maybe help get these muscles kick started without hurting myself. Currently i'm doing One Armed DB Tri-Extensions as a tri workout. Should i be using two hands with heavier weights? As far as hams go i'm doing seated leg press, and standing leg curls. Both of these just seem to be going no where and i'm stuck at a certain weight. Any help would be much appreciated!