Use a fitness app to track your workouts? Your data may not be as protected as you think

"Jen King, director of consumer privacy at Stanford Law School’s Center for Internet and Society, said the information provided by companies may not be as devoid of details as users may think.

“People think, ‘Why would that hurt me? It’s anonymized,' ” King said. “But there’s location information attached. People start and stop their runs at their house. People don’t think about that level of abstraction. I think there is a little more propensity to assume it won’t come back and hurt you.”"