Comments by "Serenity" (@SerenityM54L2SAM5L5N1) on "Opera singers have spent years perfecting their craft teaching COVID patients breathing technique" video.

  1. They've covered it a couple of times weekly for several weeks.
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  2. Or, do both. Does yoga improve breathing? Doubtful. This breathing technique seems to work for some, even if it's just a placebo. The interaction aspect is also important.
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