Sleep-deprived leaders are less effective at regulating their displays of positive emotion, and are therefore perceived as less charismatic, reports Harvard Business Review.

Unfortunately, sleep deprivation undermines both the experience of positive emotionĀ as well as the regulation of emotion. As a result, sleep-deprived leaders are less likely to show positive emotion to their teams, and sleep-deprived team members will be less likely to experience positive emotion. Our hypotheses predicted that sleep deprivation of both leaders and team members can undermine attributions of leader charisma. In other words, sleep-deprived leaders are less inspiring, and sleep-deprived team members are harder to inspire.