If your job relies on interpersonal communication, making judgment calls, reading other people’s faces, or managing your own emotional reactions — pretty much all things that the modern office requires — I have more bad news. Researchers have found that overwork (and its accompanying stress and exhaustion) can make all of these things more difficult.

Even if you enjoy your job and work long hours voluntarily, you’re simply more likely to make mistakes when you’re tired — and most of us tire more easily than we think we do. Only 1-3% of the population can sleep five or six hours a night without suffering some performance drop-off. Moreover, for every 100 people who think they’re a member of this sleepless elite, only five actually are. The research on the performance-destroying effects of sleeplessness alone should make everyone see the folly of the all-nighter.

Work too hard and you also lose sight of the bigger picture. Research has suggested that as we burn out, we have a greater tendency to get lost in the weeds.