What we do is this. In the power rack, set the pins to halfway between your hip and knee. Put a bar in there and start with a light weight. Grip the bar with one hand in the middle on the knurl. You'll be facing towards the end of the bar, not the bar itself. You can hold onto the power rack if you like, I do. Pick it up and balance it. You may have to put it down to readjust. Hold it for 15 seconds and do the other hand. Two or three sets are good. I've worked up to 185 for fifteen seconds for each hand.