Squatting is your man making exercise.
When my squat is in the shitter, without fail, the rest of my training usually is too.
If my squat is kicking ass, the rest of my training is too. Even if it's not, it feels like it is. You know why? Because my squat is.
From: The Lifter Series - I Will Squat at Paul Carter's site, Lift-Run-Bang