Have you noticed a theme lately? There’s lots of mobility drills that you can do that are simple and rely primarily on using belly breathing to open up stiff positions.
Set yourself up so your hip is approximately 90 degrees. Tuck your pelvis under and lock it in place. Take a big belly breathe inflating your belly first and then expanding into your upper back. Exhale and sink your body deeper into flexion (hands behind your head). Repeat for a few breaths.
Make sure to keep your tail tucked UNDER. Don’t overextend. That defeats the purpose of the mob.
Have fun and let us know how it goes!