Sportline’s DUO 1060 Heart Rate Monitor
12. Sportline’s DUO 1060 heart rate monitor ($119.99; sportline.com)
Why we like it: The best heart rate monitors require you to wear a belt around your chest, but the DUO 1060 gives you the option of just placing your finger on the watch for an equally-precise readout. What we really love is that it gives you that information in 3 beats or less, making it the fastest, most accurate contact heart-rate measuring device on the market.