Needed this video as a reminder. As a older lifter my lower spine has decreased disc space. By not properly bracing for my squats it was causing alot of issues. Thanks Seb. On another note GO THOR 501 elephant bar DL :).
If you use a foam roller to warm up, don't forget to roll out your mid and upper back. A lot of stiffness can hide there. For me, it's the difference of about an extra inch of squat depth without butt wink.
Its mot your 6 pack abs u have to worry about mate. Its your obliques. U brace with breathing out through your side abs to brace. Not tensing your 6 pack. Because of wear the rectus connects to your pelvis. It can easily cause posterior pelvic tilt. Which will make it hard to go into internal rotation of the femur when you squat down which we need to stretch glutes.