Summary: Some companies are experimenting with tracking their employees with wearable devices. We fitted Sarah O'Connor, the FT's employment correspondent, with a sleep tracker, a mood ring and a fitness tracker, and then shared the data with her boss. She tells Robin Kwong about the <a href="http://www.facebook.com/wearablesatwork">week-long experiment</a>, what it feels like to be tracked as an employee, and whether this sort of data collection could actually be useful to an employer.
