How much sleep we did or didn’t get the night before is one of the most basic factors known to predict how productive we will be today. One factor known to cause sleep deprivation is Twitter. According to a new study in the journal Sleep Health, how late we stay up scrolling through tweets can affect our work performance. To conduct this study, researchers looked at one kind of employee whose every move is scrutinized for maximum productivity: NBA players. Over 37,000 tweets by 112 NBA players were analyzed from 2009 to 2016, and a link between late-night activity and poorer next-day game performance was found.