Ever wonder what your heart rate is when you’re running while listening to music? The ear provides a great platform for doing this kind of biometric measurement. Earbuds, rather than watches, tend to be the most accurate heart-rate monitors on the market, outperformed only by traditional chest straps.
Essential reading: Smart earbuds – top biometric headphones
Headphones are also great for people who work out and want to check their steps, distance traveled, and calories burned, among other information.