I walked into the gym today and the staff member who swiped my card said "Squatting today?" To which I replied, "yes, how did you know?" He said "I saw the lifting belt" Then, after a moment of awkward deep thought he said "I feel bad for you". Politely I replied, "I feel bad you don't know the pleasure attained with deep heavy squats".
That brings us to our activation/mobility exercise of the session. Below is a video of deep squat extension rotations. These are a great way to increase hip and adductor mobility needed for deep squatting. You also get the deep core and t-spine extensors activated that are needed to maintain a rigid posture during the squat. Getting into the position, and the squat to stands at the end are very good prior to deadlifts for increasing mobility in the hips and training the flat back posture needed during heavy deads.