This is an exercise I do in between every single lecture. It’s quick and easy but very good after having sat in the same position for a long time.

How to do it: grab your fingers and open your shoulders to reactivate the upper part of your back. If you feel like it lean back a little bit to also work with the spine and lower part of the back. Important is to firmly stay on the ground. As always in  Yoga, breath in through the nose and out through the mouth. The deeper and more conscious the breath, the more you’ll be able to immerse into the Asana (Yoga pose). Try and think of something that evokes a positive feeling in you and engage with that thought through your breathing. Do 3 reps (repetitions) each lasting around 10-15 seconds.

Since I am a licensed Yoga instructor I feel the urge to always give the source I have retrieved the information from: https://www.redbull.com/at-de/die-besten-buero-uebungen-gegen-langes-sitzen