actually, if you are power squatting correctly you should have somewhat of a forward lean. The idea is to bring in as many muscle groups as possible at once. Most people get about a 45 degree lean. also, your abs may or may not be weak, the thing most people do wrong is that they don't use their abs correctly. You really have to push your stomach out against your belt. You can get away with it when you're ony squatting 600 or so, but when you get up inthe 700's etc you really need your abs out against the belt. Just tighteneing them is not enuf. A good way to learn how to use your abs is stand in front of a mirror, take air into yoru stomach, ifyour shoulders are moving upand down then the air is not going into your stomach but it is going into your chest. The 600 squat thing is just a base line for a 220'er or 242'er -- obviously if you are a heavier or lighter lifter the number will differ.