Squats - Are Yours Perfect Like These?

I like a good squat. It's an exercise I do on my off-running days, when strength training is a priority (psst: I'm not doing very good on this front lately). I'm never really sure if my squats are perfect, though. Sometimes, I stand in front of a mirror so I can watch my form. Still, not sure if I'm squat successful. Pete McCall, with the American Council on Exercise (ACE), is here to help. Check out these spot-on squats.