AliDee wrote:How to Squat Down.
You have unracked the bar correctly. All your muscles are tight and ready to Squat. The key to the Squatting correctly with a low bar position are your hips: you must have tension in your hamstrings at the bottom.
Knees Out.
Never allow your knees to buckle in unless you want to injure them. Push your knees out as you Squat down.
Hit Parallel.
Your hip joint must come lower than your knee joint. Ask someone to judge your depth or tape yourself. No Partial Squats.
How to Squat Up.
Your hip muscles will be stretched when in the bottom position if you Squat correctly. Use that stretch to bounce out of the hole. If you Squat this way, you'll be lift a lot more weight while keeping your knees safe.
Push Your Knees Out.
Same as for the way down: don't let your knees buckle in. Push your knees out as you Squat up.
Squeeze Your glutes At The Top.
Power comes from the glutes. Squeeze them hard as you lockout the weight. It will also keep your lower back safe.
Always use free weights for Squats. Machines are not only less effective for muscle and strength gains because they balance the weight for you, they also force you into fixed/unnatural movement patterns. Check Strong Lifts 5x5 for a Squat focused training program that results in fast muscle and strength gains.
I used to squat parallel, but I decided to squat deep about a year ago. It is bad for the ego because you will need to drop your load significantly. I went from lifting 150kg to 70kg, but the deeper squats have taken my leg development to a new level, and it is safer for the knees.