Biofeedback testing?

determined_14
determined_14 Posts: 258 Member
edited November 19 in Fitness and Exercise
Just ran across this link about biofeedback testing.
https://www.girlsgonestrong.com/one-weird-trick/?awt_l=7aeFY&awt_m=3Vqvw2c4DM2eIIP
I experimented with it a bit today, but I'm curious if the experts on here know about or use this theory. Is it valid? How does it work? Are there any good resources someone can point me toward to learn more about it? Thanks.

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