Running economy explains why two runners with similar aerobic fitness can move at very different speeds. It is the oxygen or energy cost of running at a given pace — and improving it can help you run faster without needing a higher VO2 max.
Better running economy means you can hold the same pace at a lower metabolic cost, or potentially run faster for the same physiological effort. It is influenced by training history, strength, neuromuscular qualities, biomechanics, footwear and fatigue — but there is no single “perfect” running form that guarantees good economy.
A bigger aerobic engine does not automatically make you a faster runner
VO2 max describes the size of your aerobic engine. Running economy describes how much fuel that engine needs to produce a given running speed. Endurance performance improves when you build the engine, raise the sustainable fraction of it and reduce the cost of moving.
How much oxygen your body can use at maximal aerobic effort.
How much of that aerobic capacity you can sustain for meaningful periods.
How much oxygen or energy you need to hold a given submaximal pace.
What is running economy?
Running economy is the oxygen or energy demand of running at a given steady, submaximal speed. In practical terms, it tells you how expensive a pace is for your body.
If two runners move at the same pace and one uses less oxygen to do it, that runner is more economical at that speed.
The concept is similar to fuel economy in a car. Two cars can have engines with similar peak power but require different amounts of fuel to travel at the same speed. Runners are the same: a large aerobic capacity is useful, but how economically you convert that capacity into forward motion matters too.
Why running economy matters for race performance
Running economy helps explain why VO2 max alone is an incomplete predictor of race performance. A major review reported that running economy can vary by as much as 30% among trained runners with similar VO2 max values. That means two athletes can have comparable aerobic ceilings yet experience very different physiological costs at the same pace.
Two runners are moving at exactly the same speed.
Runner A needs less oxygen and less metabolic energy to hold that speed.
Runner A may preserve more capacity for a faster pace, a longer race or the final kilometres.
How large is your aerobic engine? Read VO2 Max by Age. How much can you sustain? Read Lactate Threshold Running. How costly is a given speed? That is running economy.
How is running economy measured?
In a laboratory, running economy is usually measured while you run at one or more submaximal speeds on a treadmill. A metabolic cart measures oxygen consumption and sometimes carbon dioxide production after you reach a steady state.
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Run at a controlled speed
The pace needs to be submaximal enough that oxygen consumption can stabilize rather than continually drift toward maximal effort.
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Measure oxygen or energy cost
The lab records the metabolic demand required to maintain that speed.
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Compare under the same protocol
The most useful comparison is usually your own result at the same speed, treadmill grade, footwear and testing procedure on a later date.
| Expression | What it represents | Main caution |
|---|---|---|
| mL O2/kg/min | Oxygen consumption relative to body mass at a fixed speed | Changes with speed, so different test speeds are hard to compare directly |
| mL O2/kg/km | Oxygen cost normalized to distance | Still depends on test method and physiological assumptions |
| kcal/kg/km | Estimated energetic cost per distance | Requires conversion from respiratory data |
Running economy depends on speed, treadmill grade, footwear, temperature, fatigue, measurement method and how the data are normalized. A lower value is generally better only when the testing conditions are meaningfully comparable.
What is a good running economy?
There is no universal number that cleanly separates “good” from “bad” running economy for every runner. Published values are influenced by pace, ability level, body size, laboratory protocol and the unit used to report the result.
If your oxygen or energy cost falls at the same standardized speed, your economy has improved.
Lower heart rate or RPE can support the picture, but neither directly measures running economy.
It is only meaningful when the protocol, speed and reporting method are closely matched.
Biomechanical metrics may relate to economy, but none is a direct substitute for metabolic measurement.
What does a 2–4% improvement in running economy mean?
A percentage improvement in economy means the metabolic cost of the same pace has fallen by that percentage. It does not mean your race time will automatically improve by the same percentage.
How a lower oxygen cost changes the same running pace
| Economy change | Illustrative oxygen cost | What changed |
|---|---|---|
| Baseline | 200 mL/kg/km | Reference condition |
| 2% improvement | 196 mL/kg/km | Same pace, lower cost |
| 4% improvement | 192 mL/kg/km | Same pace, lower cost |
This is a mathematical illustration, not a normative running-economy value or race-time prediction.
Running economy vs VO2 max vs lactate threshold
| Metric | Core question | Better usually means | Best practical use |
|---|---|---|---|
| VO2 max | How large is the aerobic engine? | Higher maximal oxygen use | Aerobic capacity |
| Lactate threshold | How much hard aerobic work can you sustain? | Higher sustainable speed or fraction of capacity | Tempo and threshold pacing |
| Running economy | How costly is this running speed? | Lower oxygen or energy cost | Efficiency of translating fitness into pace |
These qualities interact. Improving one can make you faster even if the others stay relatively stable. That is why a runner can improve race performance without seeing a dramatic change in a watch-estimated VO2 max.
What determines running economy?
Running economy is not controlled by one variable. It emerges from the interaction between metabolic, cardiorespiratory, neuromuscular, biomechanical and equipment-related factors.
Aerobic history
Years of consistent running expose the body to repeated submaximal movement and can improve the metabolic and neuromuscular qualities involved in efficient running.
Force production
Stronger muscles and tendons can improve how effectively force is produced and recycled at running speeds.
Movement pattern
Cadence, vertical motion, stiffness and joint mechanics can relate to economy, but their effects are highly individual.
Shoe properties
Mass, cushioning, stiffness and energy return can change the metabolic cost of running.
Durability
Your economy at minute 20 may not be the same as your economy after two hours of running.
Heat and terrain
Temperature, gradient, wind and surface can change physiological cost even when your watch shows similar pace.
Is there a perfect running form for better economy?
No single technique cue has been shown to produce the best economy for every runner. A 2024 systematic review and meta-analysis of 51 studies found that most individual spatiotemporal variables — including contact time, flight time and stride length — had trivial or non-significant associations with running economy when considered alone.
Do not chase a universal cadence or foot strike
Your self-selected running pattern is the result of years of anatomy, training and neuromuscular learning. Changing it may help if there is a clear problem, but forcing every runner toward the same cadence, foot strike or stride length can increase cost instead of lowering it.
- Use form changes to solve a specific problem, not to copy an idealized model.
- Make small changes and evaluate comfort, pace and effort over time.
- Read our running cadence guide before treating 180 steps per minute as a universal target.
Economical running is individual. The metabolic result matters more than whether your stride looks textbook-perfect.
How to improve running economy
The strongest approach is not one magic drill. It is a combination of consistent running, appropriate strength work, neuromuscular speed exposure and enough recovery to absorb the training.
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Build consistent running volume
Economy develops through repeated exposure to running. Easy aerobic mileage gives you a large amount of technically specific practice without the fatigue cost of making every run hard. Use our easy run pace guide and Zone 2 running guide to keep this work sustainable.
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Add high-load strength training
A 2024 systematic review with meta-analysis found that high-load strength training can improve running economy, with particularly useful effects reported at faster running speeds. The review defined high-load work as at least 80% of one-repetition maximum.
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Use plyometrics as a complement
Jumps, hops and bounds train rapid force production and elastic qualities. Evidence suggests plyometrics can improve economy in some runners, and combining strength methods may be more effective than relying on one method alone.
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Keep some fast, relaxed running
Strides, short hills and controlled interval work expose you to faster mechanics without turning every session into a maximal workout. This can improve coordination and speed-specific familiarity.
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Train at the speeds that matter for your race
Running economy is partly speed-specific. A marathon runner still needs marathon-specific volume and pacing, while a 5K runner needs familiarity with much faster speeds.
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Protect recovery
Economy can deteriorate under fatigue. Training only improves it if the hard work is recoverable enough to be repeated consistently.
Use it as an adjunct. Two focused sessions can work well in many training phases, but the right amount depends on your running volume, lifting experience and proximity to key races.
A simple running-economy strength session
This example is for runners who already have basic lifting experience. It is not a requirement to use these exact exercises, and new lifters should learn technique before chasing heavy loads.
Strength-focused session
35–50 min- Squat or trap-bar deadlift: 3–4 sets of 3–6 reps.
- Split squat or step-up: 3 sets of 5–8 reps per side.
- Heavy calf raise: 3 sets of 6–10 reps.
- Optional low-volume hops or pogos: 2–3 sets.
Execution: keep technique crisp and avoid turning a strength session into a bodybuilding circuit that leaves your key runs flat for days.
Strides after easy running
8–12 min- Finish an easy run.
- Accelerate smoothly rather than sprinting from a stop.
- Run tall and relaxed at a fast but controlled speed.
- Walk or jog until fully ready for the next repetition.
Execution: the goal is quality movement and speed exposure, not exhaustion.
Do super shoes improve running economy?
Footwear can change running economy immediately. Modern racing shoes combine low mass, compliant high-energy-return foam and stiffening elements such as carbon-fiber plates. A 2025 systematic review with meta-analysis found that footwear characteristics can meaningfully affect running economy in long-distance runners.
Individual response varies with speed, body mass, mechanics, shoe fit and the comparison shoe. The most useful question is whether a specific shoe lowers your cost or improves performance without creating new comfort or injury problems.
Footwear can be a useful race-day tool, but it should sit on top of training rather than replace it. The larger long-term opportunity is still consistent running, strength and race-specific preparation.
Can you track running economy without a lab?
You cannot directly measure running economy from pace and heart rate alone, but you can track field signals that often move in the same direction as improved endurance efficiency.
Pace at a fixed heart rate
On a comparable route and in comparable weather, faster pace at a similar submaximal heart rate can indicate improved fitness. It does not isolate running economy from other adaptations.
Heart rate at a fixed pace
A lower stable heart rate at the same pace can be useful when conditions are similar, but hydration, heat, fatigue and sensor error can change the result.
RPE at a fixed pace
If a pace repeatedly feels easier across several weeks, that is meaningful practical progress even if you do not know exactly which physiological variable changed.
Race or time-trial performance
Ultimately, running economy matters because it helps you convert fitness into speed. Improved real-world performance is the most important confirmation.
Use the same route or treadmill, similar footwear, similar time of day where practical and comparable environmental conditions. One hot, windy run should not overwrite a multi-week trend.
Does running economy get worse when you are tired?
It can. Running economy is often measured when an athlete is fresh, but long-distance racing happens under accumulating fatigue. Your ability to preserve economy late in a race is part of what coaches increasingly describe as durability or fatigue resistance.
A well-designed long run develops fuel management, musculoskeletal tolerance, pacing discipline and the ability to maintain effective movement as fatigue rises. For marathon preparation, see our marathon training plan.
Common mistakes when trying to improve running economy
Forcing 180 cadence
Cadence is speed- and athlete-dependent. A universal number is not a universal optimum.
Changing foot strike for no reason
There is no clear evidence that every runner becomes more economical by moving from heel strike to forefoot strike.
Adding heavy lifting too fast
Strength training can help, but excessive soreness and fatigue can reduce running quality if progression is poor.
Testing in different conditions
Comparing treadmill data in one pair of shoes with outdoor data in heat and wind tells you very little about true change.
Assuming lower heart rate equals economy
Heart rate reflects many things. It is a field marker, not a direct measure of oxygen or energy cost.
Buying speed instead of training it
Advanced footwear can help, but it does not replace the aerobic, strength and durability adaptations built through training.
A practical week for better running economy
This is an example structure for a runner already training consistently. The exact volume should match your experience and race goal.
Rest / easy
Absorb the weekend.
Quality run
Threshold or intervals.
Easy + strength
High-load work.
Easy + strides
Relaxed speed.
Rest / easy
Keep fatigue low.
Long run
Durability + endurance.
Easy / strength
Optional second lift.
Frequently asked questions
What is running economy?
Running economy is the oxygen or energy cost of running at a given submaximal speed. A more economical runner uses less oxygen or energy to hold the same pace.
What is a good running economy?
There is no single universal cut-off because running economy depends on speed, units, body size and test protocol. The most useful benchmark is improvement in your own cost at the same standardized pace.
How can I improve running economy?
Consistent running, high-load strength training, plyometrics, relaxed fast running such as strides and race-specific training can all contribute. The best program combines these without creating so much fatigue that running consistency suffers.
Does strength training improve running economy?
Yes, evidence from systematic reviews and meta-analyses supports high-load strength training as an effective adjunct for improving running economy in middle- and long-distance runners.
Does cadence affect running economy?
Cadence has a small association with running economy in observational research, but that does not mean every runner should target the same cadence. Your most economical cadence is influenced by speed, anatomy and individual mechanics.
Do carbon-plated shoes improve running economy?
Advanced racing footwear can reduce the metabolic cost of running for many athletes, but the size of the effect is individual and depends on the shoe, speed and runner.
Can Garmin measure running economy?
Not directly in the laboratory sense. A watch can track pace, heart rate, cadence, power estimates and other field metrics, but direct running-economy measurement requires metabolic testing of oxygen or energy cost at a controlled pace.
Is running economy the same as running efficiency?
The terms are often used casually as if they are interchangeable, but exercise physiology usually uses running economy to describe the metabolic cost of running at a given speed. Mechanical efficiency has a more specific definition relating useful work to total energy expenditure.
How this guide was built
Triathlon Loop separated the definition and measurement of running economy from training interventions, biomechanics associations and footwear effects.
Core physiology
Definition, measurement and interpretation are based on a major review of running economy research.
Training evidence
Strength recommendations use systematic review and meta-analysis data rather than isolated workouts.
Technique and footwear
Biomechanics and shoe claims are separated from causal training advice and presented with their limitations.
Improve the engine, the threshold and the cost of pace
Running economy is one part of the endurance-performance puzzle. Pair it with aerobic capacity, threshold development and smart pacing.
Sources
- Barnes & Kilding — Running economy: measurement, norms and determining factors
Definition, measurement, determinants and variation in running economy.
- Van Hooren et al. — Running biomechanics and running economy
Associations between cadence, vertical displacement, stiffness and other biomechanical variables.
- Llanos-Lagos et al. — Strength training and running economy
High-load, plyometric and combined strength-training effects on running economy.
- Xu et al. — Footwear and running economy
How footwear characteristics can influence running economy in long-distance runners.
