That makes heart rate monitoring on the Fitbit Charge 6 a game-changer for indoor workouts, especially with compatible gym equipment. Connect to Bluetooth-enabled treadmills, ellipticals, and ...

And the battery life won’t leave you stranded mid-session: a full charge lasts up to 70 days of regular use and a quick one-minute charge gives you three hours of power when you’re in a pinch. The USB ...