Headphones dont care if youre listening to terrible music while exercising, but a new pair from 50 Cents SMS Audio might judge your workout. The companys just announced BioSport In-Ear, a set of wired earbuds with biometric capabilities to record heart rate using built-in optical sensors. This particular pair is using technology from Intel. So far that list only includes RunKeeper, which the two companies say will record heart rate, pace, distance, elevation, and how many calories youve burned.