Barbell Squat

the "king of exercises"; A weightlifter puts a bar across his shoulders while he is in a standing position and, keeping his torso as upright as possible, squat down until the tops of his thighs are parallel to the floor or below. variations on the squat include:

box squat

front squat

hack squat

jefferson squat

sissy squat

see the Misc.Fitness.Weights FAQ: What is the proper way to squat?