Yes, I've heard of the ketogenic diet, first time was via a Tim Ferriss podcast interviewing Dom D'Agostino. It's pretty intriguing. . . if I ever get cancer, I would try the ketogenic diet out pretty quickly.

I prefer to work out on an empty stomach because I can push myself a little bit harder without fear of acid reflux or nausea. Sometimes I'll eat a banana beforehand, but otherwise empty is best.