Unlike its bulky, ugly competition, the Polar FT40 Heart Rate Monitor packs all the technical performance into a slim, stylish package. While it may look like an everyday watch, the FT40 features a wireless heart rate function with target zone alarms, real-time HR data, and a 50-exercise tracking program. Polar lets you choose between audible and visual alarms as well, so you’re not beeping like mad in the gym and you don’t have to stare at your watch during a trail run.