When you do them right. And I feel better. Of course, not as much weight as I could before with a half squat. Last year squating incorrectly (halfway down, almost to parallel), got to 250lbs (4x45,2x25) x10. This year, today, 140lbs (2x45,2x25) x5, with correct form. I don't think I'm maxing out though. I'll be happy when I hit 3x45 plates on each side, and then go from there.