How to use Atsusa on your Garmin

Everything you need on one page. No login.

The colour around the number is your estimated core temperature.

37.6

GreenAll good. Keep going.

38.2

YellowHeat is building. Ease up and drink.

38.9

OrangeSlow down. Look for shade.

39.6

RedStop and cool down now.

Page 1

Glance

Ring and estimate, before you start.

Page 2

Run

Time, heart rate and estimate while you record.

Page 3

Details

Weather, phase and your 6-digit tester code on the last line.

COOL
DOWN

If your estimate gets dangerous, the whole screen turns red. Press any button to dismiss it, then slow down, find shade and cool off.

Press START to record and START again to stop, then save. Your run syncs to Garmin Connect and on to Strava like any other run.