B. Kliban comes in handy again!
I’ve been learning a lot about the importance, not of jumping specifically, but of shaking, for stress & trauma release. Rather than go on about this myself, I refer you to: https://traumaprevention.com/ . There are also lots of interesting videos on YouTube about T.R.E. (Tension & Trauma Releasing Exercises).
Learn to relax those “anti-jump” (or anti-shake) muscles and LET GO!