In order to squat to full depth , we must have adequate ankle and hip mobility ( stretching it's a MUST ) and sufficient pelvic-core control.

You must also have great coordination and balance. By turning the toes out at an angle, it allows a majority of people to achieve a full depth. With that said, we should be able to reach ass to grass with a squat.

The best way to learn and master the form is doing bodyweight squats, remember guys the BODYWEIGHT SQUAT it's a movement first.

As soon as you pick up a barbell, the squat now becomes THE EXERCISE ( one of the most important exercise with others compound exercise ). So turning the toes out slightly it creates a mechanical advantage for the squat.

Not only does it give us a slightly wider base of support, but it does not challenge our pelvic control and mobility to the fullest extent . This is why some people can squat deeper when they turn their toes out. By externally rotating the hips we can usually achieve a deeper squat.

When our hips externally rotate, the adductor muscles on the inside of our legs are lengthened. As we squat these muscles are put in a better position to produce force. This simply means the adductors are turned on and recruited to a greater degree during the squat if you turn your toes out slightly. The adductor magnus specifically has been shown to help produce hip extension. More help from the adductors means a stronger and more efficient way to move the barbell and it also means better Gainz