Safe Squat? 12 Hr Left for 40% off All Training Programs code SAVE40 link at https://www.advancedhumanperformance.com/store/all . Also my book MOVEMENT REDEFINED Fundamentals is FREE & explains all of my training methods. Best shoes Vivobarefoot code DRJOEL25. Is this dangerous? For me & my clients NO, because we’ve mastered our body mechanics with 90 deg EI. For most others folks yes it’s quite dangerous. Here’s why. From ages 18-26 I trained deep ass-to-grass (ATG) squats max range of motion.