Psoas and Hip Flexors relax immediately with the correct sensory input.
The technique shown is a Postural Restoration Institute technique. Rhythm and dancing is not owned by anyone.

I offer oneonone training as well as online consultations via Zoom. The information can be found here:
https://pritrainer.com/onlineconsul...

For an example of typical exercises for a beginner program, you can look here:
https://pritrainer.com/prileftaicr...
Please note, this is quite generic and not sufficient for everybody!