I know somewhat about this work but never did it. Just recently my grandgirl landed a FT job at an upcoming Alternative Health/Healing business, Next Health, in Century City, CA. So I'm more interested now. The business also does IV's, laser work, red light work and some others and this Cryotherapy chambers. They are around the US and parts of the world and first started in Japan in late 70's.
A newbie to cryotherapy went in nervous but came out feeling the benefits of having what amounts to a giant ice cube applied to her body for three minutes; the procedure reset her systems much like working in safe mode to fix a computer.