Terrible idea, actually. The productivity gained by the health sacrifices is dubious and might be counterbalanced by the negatives.

Sacrificing most of the fun but not productive activities that fill the hours of less-ambitious young people (video games, TV, social drinking, chasing tail) is reasonable (I haven't had a drop of alcohol, or been on a date, in months). An occasional 5-hour night of sleep can be justified by a freakish, almost hypomanic productive streak. Sacrificing one's health for work is idiotic, and going 7 years without taking a vacation is nothing to be proud of.

[Edit: I developed panic disorder from working through a severe flu, in an overbearing environment. I'm still on meds, over a year later. So I have personal experience to support my claims.]