In addition to traditional medical examination, many wellness programs provide biometric screenings and increasingly resort to wearable technology to digitally monitor employees. Thus, devices such as Fitbit, Nike+ FuelBand, and Jawbone UP, which can record information related to health, fitness, sleep quality, fatigue levels, and location, are now being used by employers as part of their wellness programs. 59 One of the first to do so was BP America, which introduced Fitbit bracelets in 2013. In 2015, at least 24,500 BP employees were using them and countless other U.S. employers have followed suit. For example, Profusion used Fitbits and other applications to track 171 personal metrics—including sleep quality, heart rate, and location—for thirty-one members of staff, twenty-four hours a day. Based on the data obtained, the company divided its personnel into either the "busy and coping" or "irritated and unsettled" categories.