It's the hip, cool way to carry your cell phone, but it's also a bit unhealthy. Whether you're running, walking, or jogging, carrying your cell phone in your bra is becoming more and more common. 

However, some doctors say that placing your cell phone directly on your skin for a long period of time can increase your risk of developing breast cancer and other diseases. It's also considered a bit unsanitary. Think about it, your phone is directly against your skin and sits there and collects sweat. Then you place it against your face?  EW! 

Here's our own Robin Rock with her daughters after the 5/3 River Bank Run.  Notice the phone case holder!!!