Hip Hinge and Deadlift Fix: Hip Mobilization

Hip extension + internal rotation!
Stand with one foot staggered in front of the other. Put a majority of your weight on the front leg. Let your front leg hip travel backwards as you hinge your trunk forward. Touch your opposite hand to your front knee and slide down your shin. Keep your knees unlocked to simulate a deadlift or a hinge shape.
This should be a pain-free movement!
Before you switch to the other side, perform a "good morning" or double leg hinge to compare how your legs feel.