Put your numbers on your watch

Garmin

On the watch, from the menu button. On many models that means holding UP.

Threshold, maximum or resting heart rate

1. Open User Profile > Heart Rate & Power Zones > Heart Rate.
2. Choose LTHR, Max. Heart Rate, or Resting HR > Set Custom, and enter your number.
3. Under Zones > Based On, choose %LTHR for threshold zones or %HRR for Karvonen zones.
4. Use Sport Heart Rate to keep separate running and cycling zones.

FTP and power zones

1. Open User Profile > Heart Rate & Power Zones > Power, and choose an activity.
2. Choose FTP and enter your number. The watch works out the zones.

Swim CSS

1. Open the Pool Swim activity, then the menu.
2. Choose Training > Critical Swim Speed > Critical Swim Speed.
3. Enter the minutes, then the seconds.

You can also change your zones in your Garmin Connect account. Wording varies a little between models.

Garmin's own guide

Wahoo

In the Wahoo app: tap your profile image at the top left of the Home tab, then Zones.

Threshold heart rate

1. Choose a heart rate zone set and tap Edit.
2. Enter your threshold heart rate and auto calculate the zones, or change each zone's lower value yourself.
3. Tap Save.

FTP and power zones

1. Choose a power zone set and tap Edit.
2. Enter your FTP and auto calculate the zones.
3. Tap Save.

Run pace

1. Pace zone sets are on the same Zones page.

You can keep separate zone sets and assign them to different workout profiles. Tap Done to finish, then sync your ELEMNT with the app.

Wahoo's own guide

COROS

In the COROS app, from the Profile page.

Maximum and resting heart rate

1. Go to Profile > Settings > Heart Rate Zone.
2. Choose Max HR or Heart Rate Reserve, and enter your numbers.

Threshold heart rate

1. COROS sets this itself and you can't type it in. Run the Running Fitness Test on your watch to update it.

Threshold pace

1. Use the Pace Zone setting on the Profile page.
2. The percentage for each zone can be changed in the COROS Training Hub.

FTP

1. Go to Profile > Settings > Cycling Power Zones, and adjust your FTP.
2. If you have no FTP yet, COROS needs a steady ride of at least 20 minutes with power and heart rate first.

COROS uses seven power zones, so they won't line up one for one with the five here. Your FTP is the number that matters.

COROS's own guide