• Clearer zones: set your age (or let Health provide it) and max heart rate is estimated with the Tanaka formula. • Below the method you see how Zone 2 is calculated, using your own numbers. • In max heart rate, "Use estimate" brings it back to the value calculated from your age. • With "% Max HR", resting heart rate is shown as not used, to avoid confusion.

Fondo 1.1 keeps an even closer eye on your runs. • Alerts your way: choose Immediate, Steady or Rare and set how often they repeat, from 30 seconds to 15 minutes. As long as you're out of zone, Fondo keeps reminding you. • Every zone change announced: drift from Zone 2 into Z1 or Z3 and you'll hear it right away. Get back in, and Fondo tells you. • Half zones: train across the whole zone, or just its lower or upper half, with the heart rates shown. • Distance and elevation: kilometers from GPS and elevation gain from the barometer, with no maps and no route recording. You'll also find them in your summary and in Health. • New goals: besides time, you can now aim for a distance or for kilometers covered in the right zone. • Cadence metronome: set your steps per minute and hear the beat over your music. You can change it mid-run. • Pause the countdown: stop it and start again when you're ready. • On Apple Watch: vibration alerts, half zones, distance, elevation and goals. • The science behind Fondo: what research says about Zone 2, mitochondria and intervals, with sources. Enjoy your Zone 2 runs!