Gravity can only be temporarily defeated. This weightlifter is doing a move called a dead lift. The idea is to use the legs to bring a significant amount of weight off the ground. It is as much about technique as it is about strength.

As you can see the guy has great technique. He gets the over 500 lbs of metal up off the ground and holds it. He then sets it down and promptly collapses like a house of cards. I guess he needed a spotter to catch him instead of the bar.