SMS Audio BioSport earbuds review: Heart-rate-monitoring headphones are more convenient than you think

I was skeptical when I first heard about SMS Audio’s BioSport biometric heart-rate-monitoring earbuds. They measure your heart rate through your ears? Assuming they do, is the traditional method of strapping a heart-rate monitor to your chest so inconvenient that adding that feature to a pair of fitness earbuds justifies a $150 price tag? And finally,