In Harvard Business Review’s assessment of 35,000 leaders and interviews with 250 more, HBR found that the more senior a person’s role is, the more sleep they get.

In contrast, our data found that 68% of nonexecutive leaders get five to seven hours of sleep per night. When there are not enough hours in the day, they steal some from the night. Many leaders stay up late to catch up on email or other tasks. According to our research, this tendency is widespread, regardless of gender.