Heart rate zones help you train at the right effort: easy days easy, hard days hard. Most watches set zones automatically from your age, which can be off by a full zone for many people. Setting them up yourself takes a few minutes and makes every workout screen more useful.
Gather Two Numbers First
- Max heart rate: from a formula or a measured hard effort. Our article on max heart rate formulas compares the options.
- Resting heart rate: your watch tracks this. Use the average from the past week.
Plug both into our heart rate zone calculator to preview your zones.
Pick a Zone Method
| Method | Based On | Good For |
|---|---|---|
| Percent of max heart rate | Max HR only | Beginners, simple setup |
| Heart rate reserve (Karvonen) | Max and resting HR | Fitter people with low resting HR |
| Lactate threshold | Threshold HR from a hard effort | Runners and cyclists following a plan |
Where to Change Zones on Each Watch
- Garmin: Garmin Connect, User Settings, Heart Rate Zones. You can set different zones for running and cycling.
- Apple Watch: Watch app on iPhone, Workout, Heart Rate Zones, then Manual.
- Galaxy Watch: Samsung Health, Exercise settings, Heart rate zones.
- Pixel Watch and Fitbit: Fitbit app, Heart rate zones, Custom.
- Amazfit: Zepp app, Profile, Heart rate zones.
Menus change with updates, so search the app settings for “zones” if you cannot find them.
Use Zones During Workouts
- Add a heart rate zone field to your workout screen.
- Turn on zone alerts so the watch buzzes when you drift out of your target.
- Plan most easy runs or rides in zone 2, with harder sessions in zones 4 and 5.
- Review time in each zone after the workout in the app.
Check Your Zones Over Time
Revisit zones every few months, or when your resting heart rate changes noticeably. If heart rate readings jump around during workouts, the zones will too. Our guide to why heart rate readings look wrong covers fit and sensor fixes, and HRV explained shows how recovery data fits in.
Final Thoughts
Setting your own heart rate zones takes two numbers, max and resting heart rate, and one choice of method. Enter them in your watch app, add a zone field and alerts to your workout screen, and review time in zones after each session. It is one of the simplest ways to make training feel more purposeful.
FAQs
Which heart rate zone burns the most fat?
Easier zones use a higher share of fat, but harder zones burn more total calories. Both have a place.
How often should I update my zones?
Every few months, or after a big change in fitness.
Why does my watch keep changing my max heart rate?
Auto-detect is on. Turn it off if you prefer a fixed value.
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