Knowledge
Squats, the king of movements, but you also need to master the details of these exercises!
If there's one piece of fitness advice that everyone agrees on, it's "squats make for strong legs". Most enthusiasts agree that the squat is the king of leg movements, and for good reason, because it really works. In fact, the squat must be done before any other leg movement. There is some truth to these complaints when faced with the whining that comes with hard and painful training. The wrong kind of deep squat can really hurt your knees and make the deep squat even less of a quadriceps movement.