ghose 📚⁂ quoted Born to Run 2 by Christopher McDougall
Deep Squats can unlock your entire range of motion, everything from your neck to the soles of your feet, while loosening tight hips and achilles an easing lower back tension
— Born to Run 2 by Christopher McDougall, Eric Orton (Page 481 - 1)
do it unshod, with your feet giving you feedback about balance and forces