How to Connect Polar to 42Runs

Polar can connect straight to the 42Runs app. You sign in with your Polar account — there is no pairing service in between. This connection is separate from Garmin, Suunto, Coros, Amazfit, and Apple Watch.

This works on iPhone and Android. Open Settings → Connect Your Watch → Polar.

Connect

1. Open Settings → Connect Your Watch and choose Polar.
2. Tap Connect Polar.
3. Sign in to your Polar account and approve the connection.

When that finishes, the Polar row shows Connected. Do not also link Polar through the intervals.icu Connections page while you use this direct connection; that is a different Polar link and can bring in the same run twice.

What syncs

Completed Polar activities come back to 42Runs from this connection and are used for your training load, fitness, fatigue, and form. After you connect, 42Runs picks up the last 30 days that Polar makes available.

Polar cannot receive planned workouts from other apps, so a training plan from 42Runs does not appear on a Polar watch. You can follow the plan in the app, or send sessions to a watch that can receive them (Apple Watch, or Garmin, Suunto, Coros, or Amazfit through the pairing service).

Disconnecting

On Settings → Connect Your Watch → Polar, tap Disconnect. 42Runs stops receiving data from that Polar account. Your plans and history in 42Runs stay as they are.

Polar and the Polar logo are trademarks of Polar Electro Oy.

Polar connects through the same free pairing service as Garmin, Suunto, Coros, and Amazfit — intervals.icu. Open Settings → Connect Your Watch → Polar in the 42Runs app. There is no separate Polar login inside 42Runs for regular accounts.

Apple Watch connects in the iPhone app: connect Apple Watch to 42Runs. The full pairing-service steps for every brand are on how to connect your watch.

Connect

Part 1: Connect 42Runs to the pairing service

1. Open Settings → Connect Your Watch and choose Polar.
2. Tap Continue. On the next screen, tap Continue again.
3. Sign in to your intervals.icu account, or create a free account on the sign-in screen if you do not have one yet.
4. Approve the connection.

When the connection is made, the Polar screen shows Connected, with Open Connections for the next step.

Part 2: Link Polar Flow

Tap Open Connections, then:

1. Choose Polar.
2. Sign in to Polar Flow and approve the connection. Make sure all the boxes for Polar are checked.
3. Return to 42Runs and tap Done.

Already use intervals.icu with Polar Flow? Then you are done after Part 1.

This is the same connection as Garmin, Suunto, Coros, and Amazfit. Connecting Polar covers those brands too, and disconnecting watch sync from Polar stops all of them until you reconnect.

What syncs

Completed Polar runs can come back to 42Runs once Polar Flow is linked on Connections.

Polar cannot receive planned workouts. Adding a training plan still needs a connection that can send sessions to the watch: Apple Watch, or Garmin / Suunto / Coros / Amazfit through this same pairing service. Polar alone is not enough to send the plan.

Disconnecting

On Settings → Connect Your Watch → Polar, tap Disconnect watch sync. This ends the link between 42Runs and the pairing service for Polar and the other pairing-service brands. Your plans and history stay as they are. Polar Flow stays linked on the Connections page unless you remove it there as well.