Here's the thing nobody tells you about power meters: the riders who depend on them the most are often the worst at pacing without them. Take the number away and they fall apart. They go too hard on the first climb, too easy on the flat, and finish wondering what happened. Meanwhile, the rider who trained for years on feel alone — the one the cycling internet told was doing it wrong — finishes the sportive exactly on target. Feel is not a consolation prize. It is a skill. And like any skill, it can be trained.
This guide is for riders who do not own a power meter, riders whose power meter is on the blink, and riders who own one but want to stop being completely dependent on it. The RPE scale, the talk test, calibration drills, and a framework for racing by feel that actually holds up when the numbers are not there.
Why Pacing by Feel Is a Skill, Not a Compromise
Before SRM and Stages and Quarq existed, every cyclist on the planet paced by feel. Miguel Indurain won five Tours de France reading his own body. Sean Kelly won Paris-Roubaix, the Vuelta, and more classics than most people can name without ever seeing a watt on a screen. The sport functioned — and riders got extraordinarily fast — for over a century without power data.
The modern assumption is that power meters made feel obsolete. They did not. What they did was provide an external reference point that most riders stopped bothering to develop their internal one. That matters because there are situations where feel is not just adequate — it is better than power.
When you are racing in 35-degree heat and your power output needs to drop 8-12% to avoid heat-related collapse, your power meter will not tell you that. It will keep reading the same watts. Your body will tell you, though, if you have trained yourself to listen.
When you are at altitude and your blood's oxygen-carrying capacity is reduced, the wattage that was comfortable at sea level becomes an entirely different physiological cost. The power meter reads the same number. Your RPE — if calibrated — reads the truth.
When you are three hours into a five-hour event and your glycogen stores are running low, 200 watts does not feel like 200 watts any more. The number on the head unit has not changed. The cost of producing those watts has changed dramatically. A rider who can only pace by power is now flying blind in exactly the way they feared.
RPE is not a substitute for power. It is a fundamentally different measurement. Power measures the mechanical output at the cranks. RPE measures the total systemic cost of producing that output — including cardiovascular strain, thermoregulation, glycogen status, fatigue, mental state, and a dozen other variables that a strain gauge on your crank arm cannot detect.
The RPE Scale: Which One to Use and Why
There are two main RPE scales in the research literature, and knowing which one to use matters.
The Original Borg 6-20 Scale
Gunnar Borg developed this in the 1960s. It runs from 6 (no exertion) to 20 (maximal exertion), and the numbers were originally designed to correspond roughly to heart rate divided by 10 — so an RPE of 15 would loosely predict a heart rate of 150. Clever in theory, clunky in practice. Most cyclists find a scale that starts at 6 counterintuitive, and the heart rate correlation breaks down with heat, caffeine, and cardiac drift.
The Modified 0-10 Scale (CR-10)
This is the one I recommend for field use. Borg himself developed it as a simpler alternative, and it has become the default in most sports science research published since 2000. Here is what each number means for a cyclist on the road:
- 0 — Nothing. Complete rest.
- 1 — Very light. Barely moving. Soft pedalling to the coffee stop.
- 2 — Light. Easy spin. Recovery ride effort.
- 3 — Moderate. Low zone 2. Full conversation, no strain in the legs.
- 4 — Somewhat hard. Upper zone 2. Conversation still comfortable but you notice you are working.
- 5 — Hard. Tempo. Sentences get shorter. You could hold this for over an hour but it requires concentration.
- 6 — Harder. Upper tempo, approaching sweet spot. Talking becomes deliberate.
- 7 — Very hard. Threshold. Three to five words between breaths. Sustainable for 20-40 minutes.
- 8 — Extremely hard. VO2max territory. Single-word answers. Four to eight minutes before you crack.
- 9 — Near maximal. One to two minutes of sustainability. Everything is screaming.
- 10 — Maximal. All-out sprint. Seconds only.
The reason the 0-10 scale works better in the field is simple: the numbers are intuitive, the anchors are memorable, and riders can report them accurately mid-ride without having to think about it. When your mate on the group ride asks "How are you feeling?" and you say "I'm a 6," that means something immediately. "I'm a 14 on the Borg scale" does not land the same way.
The Talk Test: Your Free Threshold Detector
Let me break this down, because the talk test is backed by more solid research than most riders realise, and it costs absolutely nothing.
The principle is straightforward: your ability to speak comfortably is directly linked to your ventilatory threshold. Below threshold, breathing is controlled enough to support speech. Above it, breathing becomes so rapid and deep that talking becomes fragmented and eventually impossible. The crossover point — where speaking shifts from comfortable to uncomfortable — aligns closely with your first ventilatory threshold.
Woltmann et al. confirmed this in 2018 with trained cyclists. The point at which subjects could no longer speak comfortably matched their lab-measured ventilatory threshold within about 5%. That is a free, repeatable, equipment-free intensity test you can run on any ride.
Here is how to use it practically:
Zone 2 (RPE 3-4): You can recite the lineup of your local crit race. Full sentences, normal cadence of speech, no strain. If you have to pause mid-sentence to breathe, you are above zone 2.
Tempo (RPE 5-6): Sentences shorten to 8-10 words. You can still talk but you are choosing your words more carefully because breathing demands attention.
Threshold (RPE 7-8): Three to five words between breaths. "I'm... working... quite hard... here." If someone asks you a question, you can answer but you would really rather not.
VO2max and above (RPE 9-10): Speaking is not happening. Grunts, possibly. Words, no.
The beauty of this system is that it self-corrects for every variable that throws power off. Hot day? Your ventilatory threshold drops and the talk test moves with it. Fatigued from a big training week? Your breathing rate increases at a given power output and the talk test reflects that too. It is not as precise as a lab test. It does not need to be. For pacing purposes, knowing whether you are below, at, or above threshold covers 90% of the decisions you need to make.
Calibrating Your Internal Gauge
Here is where most riders who pace by feel go wrong: they never deliberately practise it. They ride, they feel stuff, they assume they are calibrated. They are not. Calibration is a specific skill that requires specific practice.
The Repeatable Segment Method
Pick a climb or a flat segment that you ride regularly — something between 5 and 15 minutes long. Ideally, you have ridden it dozens of times and it is burned into your legs. Even better if you have power data from previous efforts on the same segment.
Before you ride it, assign a target RPE. "I'm going to ride this at a 6." Then ride it at what feels like a 6. Do not look at your speed, do not look at heart rate, do not look at anything. Just ride the feel.
Afterwards, check. How did the time compare to previous efforts? If you have power data from the same segment on other days, how did the power compare? Was your RPE 6 actually a 6, or was it really a 5 or a 7?
Do this twice a week for six to eight weeks. The first few sessions will be rough. You will probably be off by 1-2 RPE points in either direction. By week four, most riders are accurate within half a point. By week eight, the correlation between your assigned RPE and your actual output tightens to the point where you can trust the number.
The Blind Interval Session
This drill is simple and brutally effective. Set your head unit to show only elapsed time — no power, no heart rate, no speed. Ride a set of intervals (say, 4x8 minutes with 4-minute recoveries) and assign each one an RPE. The target might be "RPE 7 for every rep."
Afterwards, upload the file and look at the power. Were the four reps within 5% of each other? Was the power in the range you would expect for a threshold effort? If yes, your internal gauge is working. If the reps drifted wildly — the first one at 280W and the last at 230W — your pacing by feel needs more work.
The blind interval session also teaches you something power-dependent riders rarely learn: what steady-state effort actually feels like from the inside. Riders who stare at watts constantly develop a habit of micro-adjusting every few seconds. Riders who pace by feel learn to find a rhythm and hold it. The second skill transfers better to racing.
The Post-Ride RPE Log
After every ride — not just calibration sessions, every ride — log a single RPE number for the session as a whole. Was that ride a 4? A 6? An 8? Ten seconds of reflection, written down.
Over weeks and months, this log becomes a remarkably useful dataset. You start noticing patterns: your Tuesday interval session is always an 8, except the weeks when you slept badly, when it creeps to a 9. Your Sunday long ride is usually a 4, but it drifts to a 5-6 in the summer heat. These patterns are your calibration data, and they are more valuable than most riders realise.
Racing by Feel: When It Actually Beats Data
Here is where it gets really interesting. There is a growing body of evidence that in certain conditions, pacing by RPE produces better race outcomes than pacing by power.
Heat
A 2018 study published in the European Journal of Applied Physiology compared two groups of trained cyclists in hot conditions (35 degrees Celsius). One group was told to maintain a fixed power output. The other was told to maintain a fixed RPE. The RPE group finished faster. Why? Because they automatically reduced their power output in the early stages — when thermoregulatory cost was highest — and were able to sustain a higher effort in the final third when the power-target group was already cooked. The RPE group's pacing was objectively smarter, and they did it without thinking about it.
Altitude
At altitude, the oxygen cost of a given power output increases. A rider targeting 250W at 2,000 metres is working significantly harder than a rider targeting 250W at sea level. The power meter reads the same number. The body is paying a higher price. RPE reflects that price automatically. Riders who pace by feel at altitude tend to start more conservatively and finish more strongly than riders who chase a power number derived from sea-level data.
Cumulative Fatigue
Three days into a stage race or a multi-day tour, the same watts cost more. Your glycogen stores are depleted, your muscles carry residual damage, your sleep has been disrupted. A rider targeting yesterday's power will overcook today's stage. A rider targeting yesterday's RPE will produce less power — and that is the correct adaptation. The body is telling you what it can afford. The smart rider listens.
Illness and Recovery
Here is one that catches experienced riders off guard. You feel slightly off — maybe 80% — so you decide to ride at 80% power. The problem is that when your immune system is mobilised, the metabolic cost of exercise rises in ways that power cannot detect. An RPE of 6 at 80% of your normal power might be exactly right. An RPE of 8 at 80% of your normal power is your body telling you to go home. Power cannot make that distinction. Feel can.
Common Pacing-by-Feel Mistakes
The skill is learnable, but there are specific traps that catch riders repeatedly.
Starting Too Conservatively
Riders without power data often start sportives and races too easy because they are anxious about blowing up. They pass the first hour at RPE 3 when they should be at RPE 4-5, and arrive at the finish with too much left in the tank. The fix is calibration. Once you know what RPE 5 actually feels like — because you have practised it on known segments — the anxiety drops away. You have data; it just lives inside your body instead of on a screen.
Ignoring RPE Drift
The same effort feels harder after three hours than it did after thirty minutes. This is normal — it reflects glycogen depletion, dehydration, and accumulated fatigue. But riders who are new to pacing by feel often respond to this drift by slowing down too much. The solution is to build drift into your plan. Accept that the final hour of a long event will feel 1-2 RPE points harder than the first hour at the same power output. If you started at RPE 5, finishing at RPE 6-7 for the same speed is expected, not a problem.
Confusing Motivation with Capacity
Race-day adrenaline is a real physiological event. Cortisol and catecholamines suppress perceived exertion, which means an effort that would feel like a 7 in training might feel like a 5 on the start line. Riders who pace purely by feel on race day — without understanding this effect — overcook the first 20 minutes because it feels easy. It is not easy. Their RPE is being chemically suppressed. By the time the suppression wears off and they feel the true cost, they are already in oxygen debt.
The fix: in races, add 1-2 RPE points to your perceived effort for the first 15-20 minutes. If it feels like a 5, assume you are actually at a 6-7 and act accordingly. This correction becomes automatic with racing experience, but it trips up nearly every first-time racer who paces by feel.
Not Accounting for Terrain
RPE on a flat road and RPE on a steep climb are different sensations even at the same physiological cost. Climbing loads the muscular system more heavily, and riders tend to rate climbing efforts 0.5-1 RPE points higher than flat efforts at the same metabolic intensity. If your pacing strategy is "hold RPE 6 all day," you will ride the climbs too easy and the flats about right. Adjust for terrain: RPE 6 on the flat, RPE 7 on the climbs, same metabolic cost.
The Hybrid Approach: RPE Plus Heart Rate
For most riders who do not own a power meter, the best practical setup is RPE as the primary pacing input with heart rate as a ceiling check. You can get a decent chest-strap heart rate monitor for under $50, and the two metrics together cover most of what you need.
Here is how the system works:
RPE is the driver. You pace by feel. You decide how hard to go based on what the effort is costing you, using the 0-10 scale and the talk test.
Heart rate is the guardrail. You set a heart rate ceiling for the effort — typically your lactate threshold heart rate for sustained work, or 85% of LTHR for long endurance rides — and you use it as an alarm. If your RPE says 5 but your heart rate is at 92% of max, something is off. You are either more fatigued than you realise, more dehydrated than you thought, or the heat is taking a bigger toll than your perception has caught up with.
The two metrics catch each other's blind spots. RPE misses the adrenaline suppression at the start of a race. Heart rate catches it. Heart rate drifts upward in the heat even when effort stays constant, which could fool you into slowing down unnecessarily. RPE keeps you honest — if you still feel conversational, you are probably fine.
This is not a poor man's power meter. It is a different system with its own strengths. The rider who masters RPE and heart rate together, and then later adds a power meter, will be a better cyclist than the rider who started with power and never learned to listen to their body. Because when the power meter battery dies at kilometre 40 of a 160-kilometre race — and it will, eventually — one of those riders can still race. The other one is guessing.
Building Your Internal Pacing Toolkit: A Six-Week Plan
If you want to get serious about this, here is a structured approach.
Weeks 1-2: Ride every session with no data visible on your head unit. Record everything in the background. After each ride, write down your RPE for the session as a whole and for each distinct effort within it. Then compare against heart rate and speed data. Note the gaps.
Weeks 3-4: Introduce the repeatable segment drill. Pick two or three segments and ride them at target RPE values twice a week. Start tracking how close your feel matches your actual output. Also begin using the talk test deliberately — actually speak out loud during efforts to calibrate the zones.
Weeks 5-6: Run blind interval sessions once a week. Set the head unit to show only elapsed time and ride prescribed efforts by feel alone. After each session, review the file. By now, your accuracy should be within 5-10% of your actual power output, and your pacing consistency across interval repeats should be noticeably tighter than it was in week one.
After six weeks, you will not need a power meter to train effectively. You might still want one — and that is fine, they are useful tools — but you will no longer be dependent on one. And that independence is worth more than most riders think. It means you can race on a borrowed bike, train when your equipment fails, and make good decisions in conditions where power data lies.
The Bottom Line
Pacing by feel is not what you do when you cannot afford a power meter. It is what you do when you want to be a complete cyclist. The best riders in the peloton — the ones who win grand tours and monuments — use power data extensively. They also make their most important pacing decisions by feel, because in the moments that matter most, the body knows things the head unit does not.
The good news is that this is entirely trainable. Six to eight weeks of deliberate practice and you will have an internal gauge accurate enough to pace any event, structure any training session, and race in any conditions. Add a heart rate monitor and you have 90% of the system for under $50.
Stop waiting for a power meter to start training properly. Your body already has the instrument. You just need to learn to read it.
If you want a community of riders who actually talk about this stuff — pacing, training structure, the practical side of getting faster without a lab — the Roadman Cycling community on Skool is where it happens. Real conversations, no gatekeeping, and no one will judge you for not having a power meter.