well I read the cme doctor education material...several times. (thanks orla, for making it easy for me) Under clinical pearls": "Avoid overexertion and UNDEREXERTION, both of which have adverse medical consequences." (my bold...sorry if this has already been posted) I think my doctors might like this as it's what they keep telling me (warning me), over and over - they call it de-conditioning. My days of FEARING the "consequences" of underexertion have long passed. It's my life.