What is the optimal depth you should train your client to squat from without pain?/2022

What is the optimal depth you should train your client to squat from without pain?

1. THE DEPTH REQUIRED FOR THE CLIENT’S LIFE OR SPORT
2. A HALF SQUAT SINCE ANYTHING LOWER ISN’T NECESSARY
3. THE HEIGHT OF A STANDARD CHAIR
4. A FULL SQUAT WHERE THE HAMSTRINGS TOUCH THE CALVE