The podcast today features a 15-minute Feldenkrais-style movement lesson that you can do while sitting in a chair.
It's a progression from a couple other sitting lessons which you can find here and here. (You can do the lessons in any order by the way.)
Each lesson is about expanding you're sitting “vocabulary”, by which I mean all the different configurations of the pelvis, spine and ribs that can keep you in a balanced and comfortable position.
Let me know what you think in the comments.
Movement Lesson on Variable Sitting Posture