Apple Watch · 4×4
How to do the Norwegian 4×4 with an Apple Watch
Two ways to run the Norwegian 4×4 on an Apple Watch: build it yourself in Apple's Workout app, or let a training app plan it into your week and coach the heart rate live. Targets, setup and when not to do it.
The short answer: you can run the Norwegian 4×4 on an Apple Watch in two ways. You can build it as a custom interval workout in Apple's own Workout app, which is free and works well if you only want the timer. Or you can use a training app such as Fitovo, which plans the 4×4 into your week, coaches your heart rate live on the Watch, and adjusts the session to how recovered you are that morning.
The session you're building
The Norwegian 4×4 is four rounds of four minutes hard with three minutes easy in between, after a warm-up. It works with any steady cardio: running, cycling, rowing, the elliptical, or brisk uphill walking.
| Block | Duration | Target |
|---|---|---|
| Warm-up | 10 minutes | Easy, conversational |
| Work × 4 | 4 minutes each | 85–95% of max heart rate |
| Recovery × 4 | 3 minutes each | 60–70% of max heart rate, keep moving |
| Cool-down | 5 minutes | Easy |
To estimate your maximum heart rate, a well-validated formula for adults is 208 − (0.7 × your age) (Tanaka 2001). At 50 that's 173 bpm, so the hard intervals sit around 147–164 bpm. Formulas are averages; if you know your real maximum from a test, use that.
Option 1: Apple's Workout app (free)
On recent versions of watchOS, the built-in Workout app lets you create a custom workout with work and recovery intervals for workout types such as outdoor run or cycle. The menus move between versions, but the shape is:
Start a custom workout
Open Workout, tap the ⋯ on your activity (e.g. Outdoor Run), and choose to create a custom workout.
Add the blocks
A 10-minute warm-up, then a work interval of 4 minutes and a recovery of 3 minutes, repeated 4 times, then a 5-minute cool-down.
Add heart-rate alerts
Set a heart-rate range alert for the work intervals so the Watch taps you if you drift out of 85–95%.
That gets you the timer and the alerts. What it won't do is decide when to do the session, space it away from your other hard days, or tell you to back off on a morning when you haven't recovered.
Option 2: let a training app plan and coach it
This is what Fitovo does with the 4×4 on iPhone and Apple Watch:
- Plans it into your week. Never within 48 hours of another 4×4, and never stacked the day after another hard day.
- Coaches it live on the Watch. Your target heart-rate band for each block, with the four work intervals counted off for you.
- Reads your recovery first. On a low-readiness morning it offers a 3×4 instead of a 4×4, or moves the session to a better day. It's a suggestion you accept or ignore, never a silent change.
- Counts the cardio you already do. If you've already done a hard run or ride that week (read from Apple Health with heart-rate data), it drops the 4×4 it had planned.
- Shows what happened. After the session: time in the hard zone, your heart-rate trace, and how far your heart rate fell after each work interval.
How often should you do it?
One or two sessions a week, with at least 48 hours between them. More isn't better: the hard intervals are demanding, and the adaptation happens in the recovery. Most people see measurable changes in cardio fitness over about eight weeks of consistent sessions.
Is it safe after 40?
For most healthy adults, yes, and it's been studied in older groups too. Build up over the first few sessions, keep the easy intervals genuinely easy, and stop if you feel chest pain, dizziness or unusual breathlessness. If you have a heart condition or take medication that affects your heart rate, talk to your doctor first.
Want the full protocol, modality options and an 8-week progression? Read The Norwegian 4×4 Protocol.