Carbonfiberboy 

I found the PDF of this article here:
https://sa1s3.patientpop.com/assets/docs/151222.pdf

I might mention that the fastest rider of about my age whom I knew took long vacations in India. There, it is a norm to fast one day a week. Back here and back to riding, he tried to continue that practice, but quickly found that he simply couldn't go like he used to, even though he was back to his usual riding and dietary practices the other 6 days. I advised him to quit the fasting, he did, and bam he was back. That seemed to me to be quite an outsized effect for a seemingly minor intervention. I know, not the 18/6 IF, but still . . .