HRV Mode on the Rhythm+2.0 brings advanced performance insights to your training, letting you track your body’s stress, recovery, and readiness with clinical-level precision. By measuring the subtle variations between each heartbeat, it delivers a deeper understanding of how your body responds to workouts, sleep, and daily stress. It’s a powerful new layer of intelligence that turns the Rhythm+2.0 into more than a heart rate monitor—it’s your personal performance coach. Pair to your favorite HRV app while in HRV mode. Once firmware has been updated, activate HRV Mode with a triple button press and back to Heart rate mode with a triple button press.