Norwegian Singles Method: Sub Threshold Pace & Heart Rate

In this guide, Norwegian singles means adapting controlled threshold-style interval training to one run per day, with plenty of easy running between workouts. “Sub-threshold” refers here to work below the higher threshold, LT2. The useful principle is managing effort and recovery, rather than copying a universal pace, heart rate or number of sessions.

Music can cue step rhythm. Music BPM, cadence in SPM, running pace and measured heart rate are different quantities, and none of them alone establishes your lactate threshold.

What is the Norwegian singles method?

The singles approach keeps one run per day rather than putting two threshold sessions on the same day. A week with three controlled sessions is an example of an adaptation, not a scientifically established prescription for every recreational runner. Choose workload from your current training and recovery.

The elite double-threshold model combines controlled workouts with substantial easy running and lactate testing. Marius Bakken's firsthand account describes his experience and individual differences; it is not a controlled trial of recreational singles training.

What is sub-threshold pace?

It is an effort target relative to your own higher threshold, not one pace shared by all runners. LT1 describes an earlier rise in lactate during an incremental test; LT2 is a higher-intensity landmark associated with the limit of a metabolic steady state. This guide's sub-threshold work does not mean every interval must be below LT1.

The Faude, Kindermann and Meyer review explains why definitions and test methods matter. A fixed blood-lactate value or a race-distance label cannot identify everyone's threshold. Ten-kilometer or half-marathon effort also means different things for runners with different race durations.

Choose conservative starting paces through an individualized plan and your training experience. A recent race result can inform that estimate; it is not a measurement of LT2. Check breathing, perceived exertion and your response across the session, and adjust rather than turning the last repetition into a race.

What heart rate should sub-threshold running use?

There is no single bpm value or percentage that identifies LT2 for everyone. Heart rate is a measurement of your body's response; music tempo is an audio setting. Playing a 165 BPM song does not put your heart at 165 bpm or prove that you are below threshold.

A 2023 paper by Casado and colleagues describes elite lactate-guided threshold work. It does not validate a universal recreational singles heart-rate prescription or a BPM-based replacement for testing.

Use measured heart rate alongside the intended effort and your individual plan, rather than treating one percentage or music tempo as a physiological boundary.

How should you structure and control a singles session?

1. Build your easy-running base. Use a manageable amount of easy running before adding demanding sessions.
2. Choose the workout before the playlist. Set conservative paces and workload through your plan; a pace calculator provides an estimate, not a threshold test.
3. Check effort during the repetitions. Watch pace alongside breathing, perceived exertion and, if available, measured heart rate. Heat, hills and fatigue can change effort at the same pace.
4. Keep the work repeatable. If effort rises beyond the target, slow down, reduce repetitions or stop. A completed table is less useful than controlled work.
5. Review recovery and the whole week. Keep surrounding runs easy and allow recovery. Progress when the current workload is manageable rather than requiring a fixed weekly percentage or retesting schedule.

Can a Norwegian singles pace calculator set my target?

A distance-and-time calculator can calculate pace; it cannot measure your threshold. Pace conversions relate time and distance, while a sub-threshold training target also depends on your own physiology, workout and recovery.

This page does not provide an interactive Norwegian singles training calculator. For the arithmetic behind pace and cadence, see the pace, cadence and step-length guide. It explains why a fixed rhythm does not fix speed; it is not a substitute for threshold assessment.

Norwegian singles, double threshold and 4×4: what differs?

NTNU's CERG exercise advice describes the 4×4 workout. It has a different intensity aim from controlled sub-threshold work. Neither label tells you how many sessions you personally recover from, and combining them increases the week's workload. See the separate 4×4 guide.

Where does music BPM help?

Observe your comfortable cadence at the intended effort. Count all steps for 30 seconds and multiply by two, or count one foot's contacts and multiply by four. For example, 160 SPM can be cued by 160 BPM music with one step per beat, or 80 BPM with two steps per beat.

Use the rhythm as an optional reminder. At constant cadence, longer steps still produce a faster pace, and you can follow the beat while working too hard. Adding 2–4% to an easy-run cadence does not establish that you are below LT2. Choose a comfortable rhythm and check effort independently.

GagaRun's Apple Music version for iPhone requires a separate Apple Music subscription. Choose a target supported by your installed version and plan, and check the available playback controls before starting. The Apple Music setup guide covers library preparation and supported transfer options. A rhythm cue does not measure your threshold or control running pace.

If the Apple Music requirements and available plan options suit your setup, download GagaRun for iPhone for an optional rhythm cue while checking effort independently.

What evidence supports the Norwegian model?

The 2023 Casado paper describes elite lactate-guided training within high-volume, low-intensity running and discusses possible mechanisms. That description does not demonstrate that three singles sessions per week are superior for every runner. Bakken's firsthand account supplies training context, not a guaranteed recreational outcome.

That supports taking intensity control seriously while keeping workload individual. It does not establish an improvement deadline or a particular music BPM as the method's missing ingredient.

FAQ

Can I do Norwegian singles with four running days per week?

You can use controlled intervals and easy running within four days, but three quality sessions would occupy most of those runs. Choose the number and duration from your current workload and recovery.

Do I need a lactate meter?

You can train using pace and effort without one, but those are estimates of intensity. Fixed BPM does not provide equivalent physiological information. Use appropriate testing and guidance when precise threshold control matters.

Is there a Norwegian singles method PDF here?

This page is an article rather than a downloadable training plan. For source reading, use the linked Casado research paper and Bakken account; they concern the underlying Norwegian model and should not be presented as a universal singles plan.

Is sub-threshold training the same as Zone 2?

Zone labels vary between systems. Specify the threshold or effort you mean rather than assuming “Zone 2” has one definition. Easy days and controlled work serve different purposes; see the threshold-training guide and easy-running guide.