In reply to The Lemming:
Just be aware from a guardian article:
However, Laura Breach, a spokeswoman for the Association of Chartered Physiotherapists in Respiratory Care (ACPRC), says while the exercises should be harmless for healthy individuals, she would not advise them, adding that they could make symptoms worse in someone suffering breathlessness. Although Munshi’s video was well-intentioned, the ACPRC says the techniques are not correct (it is preparing its own video).
Sorry don't know how to link to the article from the guardian app.
Post edited at 19:48