If your heels don't touch the floor in your Yoga Squat, you've likely been told by to roll a blanket and stick it under your heels. Maybe you've been told your ankles or hips will open up over time. This is probably not true.
Squats: Muscles Worked (Complete Guide + How To Address Weaknesses)
Pinchy Hips with Squatting?
FreeFitnessGuru - Forward Squat Anatomy Rear View
Squat Challenge Posters - HubPages
How to Squat: Muscles Worked & Proper Form – StrengthLog
Leg workout: Barbell Squat
How to Do SQUATS and AVOID Knee Pain
Squat Muscle Chart - Anatomy Diagram - Anime Gym Motivational
Busting Myths with Research: Your Hip Anatomy is not unique, and