Some days your easy pace feels effortless. On other days, that same pace feels much harder than it should.
The weather may be warmer, the route may be hillier, or you may still be carrying fatigue from a previous workout. If you judge every run only by the pace on your watch, you can end up working harder than the training plan intended.
That is where the RPE scale can help.
RPE, or rating of perceived exertion, is a 0 to 10 scale that measures how hard a run feels rather than how fast you are going. Easy runs sit at RPE 3–4, steady runs at 5, tempo at 5–6, threshold at 6–7, and VO2 max intervals at 8–9. Sunrise Running Company builds every training plan around effort, so your workouts stay on target in any weather and on any terrain.
That makes it a practical way to keep easy days easy, complete harder workouts at the intended intensity, and adjust your training without treating every adjustment as a setback.
What Is RPE in Running?
RPE stands for rating of perceived exertion. It is your own read on how hard a run feels at that moment. You will also see it written as rate of perceived effort, and some coaches say perceived effort for short. All 3 describe the same scale.
The original Borg RPE scale runs from 6 to 20. Many runners and coaches now use a simplified 0 to 10 scale because it’s easier to apply during everyday training.
On this version of the scale:
- RPE 0 is complete rest.
- Lower numbers are relaxed, conversational running.
- Middle numbers are purposeful aerobic and tempo running.
- Higher numbers are threshold, race, and interval efforts.
- RPE 10 is your absolute maximum effort.
Your rating should account for more than how fast you’re breathing. Consider your breathing, muscle fatigue, ability to speak, overall strain, and how long you believe you could maintain the effort.
RPE is personal. An RPE 4 won’t produce the same pace for every runner, but it should produce a similar level of effort.
RPE Scale Chart for Runners
The following scale is the one used throughout Sunrise Running Company training plans.
| RPE | Training Intensity | How the Effort Should Feel | Typical Use |
|---|---|---|---|
| 0–1 | Rest or very light movement | Little or no exertion | Rest, gentle walking, mobility |
| 2–3 | Recovery | Very relaxed and gentler than a regular easy run | Recovery runs, warm-ups, cool-downs |
| 3–4 | Easy | Comfortable breathing; you can speak in full sentences | Easy runs and most long runs |
| 5 | Steady | Purposeful but controlled | Steady runs and controlled aerobic work |
| 5–6 | Tempo | Comfortably hard; talking is limited to short phrases | Tempo runs and cruise intervals |
| 6–7 | Threshold | Strong and controlled; sustainable for about 1 hour under race conditions | Threshold repeats and longer race-specific efforts |
| 7–8 | 5K effort and fast intervals | Hard, focused running; about 5K race effort in our plans | 5K-paced work, fartleks, faster repetitions |
| 8–9 | VO2 max | Hard but controlled; sustainable only for short intervals | Short track repetitions and VO2 max workouts |
| 10 | Anaerobic maximum | Absolute all-out effort that can only be maintained briefly | Very short sprints and maximal efforts |
The bands overlap on purpose. RPE 6 can be the top of a tempo run or the bottom of a threshold effort, and RPE 8 can be the hard end of a 5K interval or the easy end of a VO2 max repeat. The workout description tells you which one you are in, so read the session before you rate it.
These descriptions are more important than finding a perfectly precise number. If an effort feels somewhere between RPE 5 and 6, that’s still useful information.
How to Use RPE During a Run
Before you start, look at the purpose of the workout. An easy run, tempo run, and interval session shouldn’t all feel the same.
Once you begin running, allow yourself time to settle into the effort. Your breathing and movement can feel awkward during the first several minutes, especially early in the morning or when your legs are tired.
Check in periodically and ask:
- How controlled is my breathing?
- Can I speak in full sentences, short phrases, or only single words?
- Are my legs relaxed or beginning to strain?
- Could I maintain this effort for the intended duration?
- Does this feel appropriate for the purpose of today’s workout?
If the RPE is higher than prescribed, slow down. Within most Sunrise training plan workouts, the first adjustment should be reducing your running speed rather than immediately turning the workout into a walk.
There are exceptions. Walking may be appropriate during designated recovery periods, steep climbs, run/walk workouts, or when continuing to run would no longer be productive. The purpose of RPE is to help you make a smart adjustment, not to force you to run through warning signs.
How Different Running Workouts Should Feel
Recovery Runs: RPE 2–3
A recovery run should feel noticeably gentler than your normal easy run. Your breathing remains relaxed, your stride feels unforced, and you finish feeling as though you could have continued.
The purpose is not to test your fitness. It’s to keep you moving and keep your aerobic base ticking over without piling on stress between harder sessions.
If you have to concentrate on maintaining your pace, you’re probably running too hard.
Easy Runs and Long Runs: RPE 3–4
Easy running should feel comfortable and conversational. You should be able to speak in full sentences without repeatedly stopping to breathe.
Most long runs also begin and remain in this range. Although the effort stays easy, your RPE may gradually increase as fatigue builds. That doesn’t always mean you should speed up or slow down immediately, but it does mean you should pay attention to whether the workout is still serving its intended purpose.
Long runs build endurance and time on your feet. They don’t need to become races against your previous pace.
Steady Runs: RPE 5
Steady running is purposeful but controlled. It sits between easy running and tempo intensity.
Your breathing is deeper, and conversation becomes less natural, but the effort shouldn’t feel aggressive. You should finish knowing you worked without feeling as though you completed a race or threshold workout.
Tempo Runs: RPE 5–6
Tempo running should feel comfortably hard. You’re working, but you remain in control of your breathing, form, and pace.
You may be able to speak a short phrase, but holding a normal conversation would be difficult. The effort should feel repeatable rather than desperate.
A common mistake is starting tempo runs too fast and turning them into race efforts. Begin conservatively and allow the intensity to build.
Threshold Runs: RPE 6–7
Threshold running is a strong, sustained effort you could hold for about 1 hour under race conditions. It’s harder than tempo effort but still controlled.
Your breathing is pronounced, conversation is limited, and maintaining the effort requires focus. However, you shouldn’t be sprinting or struggling to finish the opening repetition.
During threshold intervals, the recovery periods allow you to accumulate more time at this effort without turning the workout into an all-out test.
Race-Pace and Fast Intervals: RPE 7–8
In Sunrise Running Company plans, RPE 7–8 is about 5K race effort and other fast interval work.
This is hard running. You can sustain it longer than a sprint, but your breathing is heavy and talking is reduced to a few words.
“Race pace” is not one universal RPE. Marathon effort will feel different from 5K effort. When a Sunrise plan prescribes RPE 7–8, use the workout description and duration to understand the specific goal.
VO2 Max Intervals: RPE 8–9
VO2 max repetitions are hard and controlled. They’re short enough that you can maintain strong form, but long enough to require concentration and a substantial effort.
You shouldn’t begin the first repetition at RPE 10. The goal is to complete the entire workout at a consistent quality, not win the first repeat and struggle through the rest.
If your form falls apart or your pace drops sharply, you probably started too hard.
Anaerobic Efforts: RPE 10
RPE 10 is your absolute maximum. It can only be sustained for a few seconds up to about 1 minute, depending on the activity and the runner.
This intensity is rarely needed in distance-running plans. Most speed workouts should remain controlled enough that you can maintain your form and complete every repetition as prescribed.
RPE 10 shouldn’t be confused with the discomfort you feel near the end of a normal hard workout. It is a truly maximal effort with nothing left to give.
What RPE Are Marathon and Half Marathon Efforts?
Race effort is not one number, and the longer the race, the lower that number has to start. Marathon effort generally sits around RPE 5–6, and half marathon effort around RPE 6–7, which places both of them between steady running and threshold rather than up with 5K work.
Both climb as the race goes on, and that is expected. A marathon that begins at RPE 5 and finishes at RPE 8 is a well-paced race. A marathon that begins at RPE 7 is a race you will pay for over the last 10 miles, even if the pace on your watch looks correct at the time.
This is why the goal-pace segments inside a long run matter. They give you a chance to feel what marathon or half marathon effort is supposed to be before race day, when adrenaline and a crowded start line make the opening miles feel easier than they are. You can see how those segments are built into the half marathon training plans and marathon training plans.
Why the Same Pace Can Produce a Different RPE
Your running pace doesn’t exist in isolation. The effort required to produce that pace can change from one day to the next.
RPE may be affected by:
- Heat and humidity
- Hills or technical terrain
- Wind
- Altitude
- Poor sleep
- Incomplete recovery
- Stress
- Hydration and fueling
- Illness
- Accumulated training fatigue
Imagine that your normal easy pace is 9:30 per mile. On a cool, flat morning, that pace may feel like RPE 3. During a hot afternoon on a hilly route, it may feel like RPE 5.
If the plan calls for an easy run, forcing the 9:30 pace would change the purpose of the workout. Slowing down until the effort returns to RPE 3–4 keeps the training stimulus where it belongs.
That’s not a failed workout. It’s an appropriate adjustment.
Should You Use RPE, Pace, or Heart Rate?
RPE, pace, and heart rate measure different parts of your run.
| Measurement | What It Tells You | Important Limitation |
|---|---|---|
| RPE | How hard the effort feels | Requires practice and honest self-assessment |
| Pace | How quickly you are running | Can be misleading on hills or in difficult weather |
| Heart rate | How your cardiovascular system is responding | Can lag during intervals and be affected by heat, stress, hydration, medication, and sensor accuracy |
Learn to use all 3 when the information is available, and let the purpose of the workout decide which one gets the most attention on any given day.
RPE is especially useful for:
- Easy runs in hot or hilly conditions
- Trail runs where pace changes constantly
- Long runs completed on varied terrain
- Workouts performed while carrying normal training fatigue
- Runners who don’t use a GPS watch or heart-rate monitor
Pace can be valuable during race-specific workouts, while heart rate can provide another reference point during sustained aerobic running. Neither should automatically override what your body is telling you.
If your pace, heart rate, and RPE disagree for one run, adjust the workout and observe the pattern. If they remain unusually disconnected for several days, additional recovery may be needed.
Common RPE Mistakes
- Treating RPE as a pace chart. RPE describes effort, not speed. Your RPE 4 pace will change as your fitness, terrain, weather, and fatigue change.
- Running easy days too hard. Many runners settle into RPE 5 because it feels productive without feeling extremely difficult. That turns easy runs into steady runs and can leave you carrying unnecessary fatigue into important workouts.
- Starting intervals at maximum effort. An RPE 8–9 interval is hard, but it’s still controlled. Starting at RPE 10 usually leads to slower repetitions and your form falling apart later in the workout.
- Assigning an RPE based only on the final minute. When recording an entire workout, consider the overall session rather than rating it solely by the hardest moment. A mostly easy run with 4 short strides isn’t automatically an RPE 9 session because the final stride was fast.
- Ignoring unusual effort. One unexpectedly difficult run isn’t always a concern. But when several normal runs feel 2 or more RPE levels harder than usual, pay attention. Poor recovery, illness, excessive training stress, inadequate fueling, or hard weather may be contributing.
How Long Does It Take to Learn RPE?
Running by feel is a skill, and it improves with practice.
After each run, record:
- Your average or overall RPE
- Your pace
- Your heart rate, if available
- The weather and terrain
- A short note about how you felt
Over time, you’ll begin to recognize how each effort feels and how outside factors change the relationship between effort and pace.
You can also compare your planned RPE with your actual session RPE. If a workout prescribed at RPE 4 repeatedly feels like RPE 6, that’s useful information for you or your coach.
Frequently Asked Questions About the RPE Scale
RPE stands for rating of perceived exertion, and it describes how hard a run feels on a scale of 0 to 10. It accounts for your breathing, muscle fatigue, and ability to talk, so it works on any terrain and in any weather.
An easy run should feel like RPE 3 to 4. Your breathing stays comfortable, you can speak in full sentences, and you finish feeling like you could have kept going. If you have to concentrate to hold the pace, you are running too hard.
Most long runs should remain at RPE 3–4 unless the workout specifically includes steady, tempo, or race-pace segments. The effort may feel slightly harder near the end as fatigue accumulates, even when your pace remains the same or slows.
Marathon effort usually sits around RPE 5 to 6, and half marathon effort around RPE 6 to 7. A marathon that starts at RPE 5 and finishes at RPE 8 is normal, and a marathon that starts at RPE 7 usually is not.
RPE and heart rate provide different information, so one is not always more accurate than the other. Heart rate measures a cardiovascular response, while RPE reflects your overall perception of effort. Using them together can provide a more complete picture of the workout.
Heat, hills, wind, poor sleep, stress, dehydration, inadequate fueling, illness, or accumulated fatigue can all make a familiar pace feel harder than usual. Slow down enough to return to the prescribed effort rather than forcing a pace that no longer fits the day.
Start by slowing your running pace, since that is usually enough to bring the effort back down. Walking may be appropriate during planned recovery periods, steep climbs, run/walk workouts, or when running is no longer letting you control the effort safely.
RPE 5 to 6 is tempo intensity, which feels comfortably hard but stays under your control. RPE 6 to 7 is threshold intensity, a stronger effort you could hold for about 1 hour under race conditions. The workout description tells you which one you are in.
Usually not. Most distance-running workouts are designed to develop a particular system without requiring an all-out effort. Even VO2 max intervals should generally remain at RPE 8–9 so you can maintain good form and complete the full session.
Yes. RPE can be especially helpful for beginners because it does not require an established race pace or a heart-rate monitor. New runners may need time to distinguish between easy, steady, and hard efforts, but that awareness improves with consistent practice.
The original Borg scale runs from 6 to 20 and was designed to track roughly with heart rate. The 0 to 10 version is a simplified rating of the same idea, and it is easier to use while you are actually running.
Train at the Effort the Workout Requires
A training plan should tell you more than how far or how long to run. It should help you understand how each workout is supposed to feel.
Sunrise Running Company plans use RPE throughout the workout instructions so you can adjust for your fitness, terrain, weather, and recovery without losing the purpose of the session.
Explore our running plans for distances from the 5K through the 100-mile ultramarathon. Each plan is delivered through Final Surge, where you can view workout instructions, track completed training, and review your progress.
