It may not be your seemingly endless to-do list that leaves you exhausted at the end of the workday.<br />In fact, Business Insider reports it may be because you're tired of faking your emotions!<br />Scientists call it "surface acting," or hiding your real feelings in an effort to please coworkers or clients.<br />The pattern is linked both to health problems and to worsening performance at work.<br />Penn State professor Alicia Grandey sees a link between surface acting and mistakes on the job. <br />
