Arianna Huffington has spent a lot of time thinking about the links between working hard and success, and she has come to the conclusion that there is a "collective delusion" about the positive correlation, while pervasive neglect of risks that can be literally fatal. She has spent years studying the science, but she also draws conviction from personal experience.

Two years after founding Huffington Post, Huffington collapsed from exhaustion and sleep deprivation. She hit her head on her desk, broke her cheekbone, and as she proceeded from doctor to doctor, from MRI to echocardiogram to find out what was wrong, the diagnosis that came back was burnout.

"Which in 2007, wasn't the term that was much in use," she tells CNBC's Julia Boorstin in the first episode of the new podcast "CNBC C

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