Garmin HRM-Fit Heart Rate Monitor -

Athletes who train in a sports bra and want ECG-accurate data without a chest strap clip on the Garmin HRM-Fit, a heart rate monitor. The clip-on sensor attaches to medium and high-support sports bras, weighs under 2 ounces, and delivers real-time heart rate along with running dynamics like vertical oscillation, ground contact time balance, and stride length when paired to a compatible Garmin watch.

Connectivity covers ANT+ with unlimited connections plus Bluetooth Low Energy for three, with HRV support. A CR2032 coin cell runs up to about a year, and standalone step count, calories, and intensity minutes track on their own.