Structured cycling workouts on a Suunto watch: how intervals get onto your wrist

Two ways a structured ride reaches a Suunto

Build it yourself in the Suunto app, or connect a service that sends it. Suunto says both routes land in the same place: a session built in the app syncs to the watch as a SuuntoPlus Guide [Suunto Structured Workouts], and partner plans flow to the watch as Guides once your Suunto account is connected on the partner's side [Suunto Guides Getting Started].

The native route costs nothing. In the Suunto app you tap the plus symbol and choose create structured workout, or open the watch screen and go to structured workouts. You give the session a name, a short description the watch will display, the sport modes it can run in, and an optional date. Then you add steps and reps. Each step is one of four phase types, warm-up, interval, recover or cooldown, with its own duration and target [Suunto Structured Workouts]. A step can end on distance, on time, or on a lap-button press, and the target can be heart rate, power, pace or speed [Suunto Interval Workouts]. That is enough to write 5 x 4 minutes at threshold with 3 minutes of recovery between them.

The partner route is where plans come from. Suunto lists the services that send Guides, and several are built for cyclists. TrainingPeaks carries workouts a coach planned or ones you designed yourself. Intervals.icu syncs its planned workouts to the watch automatically. Nolio covers triathlon, cycling and running. Humango adjusts prescribed workouts with an AI engine, AI Endurance syncs AI-optimized plans and ramp tests, and Reddiyo describes its offer as a custom dynamic cycling plan [Suunto Guides Partners]. Each of them does the same mechanical thing. The difference is what decides the session before it is sent.

Most partners are connected from their own website or app. TrainingPeaks is the documented exception, connected from inside the Suunto app [Suunto Guides Getting Started]. If a session never appears, check which side the connection lives on before anything else.

Running a Guide on the watch, and the one-at-a-time rule

A dated Guide prompts you on its day; an undated one is picked by hand. Choose the activity, then before Start go to Options, SuuntoPlus, Guides and select the session [Suunto Interval Workouts]. During the ride the watch adds an extra display for the current step and notifies you when the next one is about to begin [Suunto Structured Workouts].

The rule that catches multisport riders is exclusivity. While recording, the watch runs a SuuntoPlus feature, a SuuntoPlus Guide or a structured workout, and Suunto states you cannot use any of them simultaneously [Suunto Guides Getting Started]. A rider who uses a SuuntoPlus sport app on the bike has to choose, ride by ride: that app or the interval session.

A power step only works if the watch can see power. Pair the meter on the watch under Connectivity, then Pair sensor, and choose the power type; the watch prompts for crank length if the meter needs it, and searches for the sensor whenever you start a sport mode that uses power [Suunto Pairing Sensors]. Calibrate from the sport mode options, not from the pairing menu. Without a paired meter a power target has nothing to compare against, so a heart-rate rider should build or receive heart-rate steps instead.

Heart-rate steps behave differently from power steps and the difference is physiological, not a watch quirk. At a constant workload, heart rate keeps climbing after the first 10 to 20 minutes as stroke volume declines [Coyle & Gonzalez-Alonso 2001]. A 20-minute step written in bpm will feel harder in its last five minutes than its first. That is the target working as designed, not a sign you are failing it.

Watts, not %FTP: what a fixed target means when your FTP moves

A power step on the watch is a number in watts. That is fine on the day it is written and stale the day your threshold changes, because a percentage target stays correct as FTP moves while a watt target does not. The FTP it was converted from matters as much as the session itself.

Most training plans are written as percentages: sweet spot at 88 to 94 percent of FTP, threshold at 95 to 105. Converting to watts is simple arithmetic. At an FTP of 250 watts, 88 to 94 percent is 220 to 235 watts. The catch is precision in both directions. FTP measured from a 20-minute test agrees with maximal lactate steady state on average, but its 95 percent limits of agreement run to about 9 percent [Borszcz et al. 2019]. A watt range copied from an old test can be 20 watts off the session's real intent before you have pedalled a stroke.

So the question to ask of any service that sends Guides is not whether it can write watts. All of them can. It is which FTP the watts came from and how recently it was updated. A plan written against a test from March is still sending March's numbers in June unless something upstream recalculates them.

Cadence is the other target worth having on a cycling step. A low-cadence strength interval at 60 rpm and a leg-speed drill above 100 rpm can share the same watt range and be completely different sessions, with different muscular demands at the same power. A cadence range on the step is what tells the watch, and you, which one you are riding.

How AdaptCycling sends its sessions as Guides

AdaptCycling sends your planned rides to your Suunto account as SuuntoPlus Guides, and each one reaches the watch on your next Suunto app sync. Targets go across as watt or bpm ranges with a cadence range, converted from the plan's percentage targets using your current FTP. Repeats arrive as repeats.

The plan itself is built in percentages, because that is how training intensity is prescribed. The Guide format takes absolute numbers, so each session is converted to watts from your FTP at the moment it is sent. That FTP starts from the number you give us and moves with the power curve in the rides we read, rather than staying frozen at your last test. If you ride with a power meter paired to the watch, you get watt ranges. If you train by heart rate, you get bpm ranges instead, and a power meter is never a requirement.

What sits behind the Guide is the part the workout builder cannot write. For a self-coached cyclist training with a Suunto, that is a week that rebuilds itself when Tuesday falls apart, and the cycling training plan options for a Suunto rider differ most on exactly that point. Two limits apply. We read cycling only, so runs and swims recorded on the same watch do not count toward the plan's load. And on connect we read the last six months of rides, not your whole archive.

Quick answers

Sources cited in this guide

1. 01
   Suunto Guides Getting Started. How to get started with SuuntoPlus guides. Suunto Support.
2. 02
   Suunto Structured Workouts. How can I create structured workouts with Suunto app and use them in my Suunto watch. Suunto Support.
3. 03
   Suunto Interval Workouts. Plan your interval workouts with Suunto app. Suunto.
4. 04
   Suunto Guides Partners. Which partners offer SuuntoPlus guides?. Suunto Support.
5. 05
   Suunto Pairing Sensors. Pairing pods and sensors. Suunto User Guide.
6. 06
   Borszcz et al. 2019. Is the functional threshold power interchangeable with the maximal lactate steady state in trained cyclists?. International Journal of Sports Physiology and Performance.
7. 07
   Coyle & Gonzalez-Alonso 2001. Cardiovascular drift during prolonged exercise: new perspectives. Exercise and Sport Sciences Reviews.

More inside Training with a Suunto

Other articles in this series

1. 01

   Suunto cycling training plan: your options in 2026

   Suunto Coach, the app's workout builder, ten SuuntoPlus guide partners, or a plan built from your rides. Who decides next week, and what it reads.

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2. 02

   Suunto TSS and training load, explained for cyclists

   How the Suunto app scores a ride, the zone limit that sets every TSS, and why your Suunto number differs from TrainingPeaks and from ours.

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3. 03

   Suunto watch and a bike computer: one training record

   A Karoo syncs rides to the Suunto app. Why one ride recorded on watch and head unit counts twice in Suunto's load, and how to keep one record.

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4. 04

   Suunto FTP: test it, or estimate it from your rides

   Suunto's FTP test is 20 minutes, and power zones are edited on the watch. How to set FTP, keep it current, and train the HR-only route.

   →