Not sure how to interpret this. In the 1800's, a 12-hour shift 6 days a week was normal. Life expectancy wasn't much different (except child mortality of course).

Have to think its our attitude toward work that is part of the problem? Now, I don't endorse 12-hour days. But it seems that 60-hour weeks aren't the whole story, if 72-hour weeks used to be the norm.