Improving your running performance
Improving your running performance requires structured, progressive training [1–3], combined with good running technique and particular attention to recovery and nutrition [4,5]. Whether you are a beginner or an intermediate runner, there are effective methods to progress while limiting the risk of injury [2,3].
Key to progress: Effective training is based on understanding physiological thresholds (VO₂max, MAS, LT1, LT2), organising training into intensity zones and constant progression — all factors that allow lasting progress while preventing injury.
📊 Performance-limiting factors
Running performance potential is assessed using tools including VO₂max and MAS (maximal aerobic speed). These can be measured during an exercise stress test or estimated with field tests (Cooper test, Vameval test, etc.).
Insufficient alpha and beta brain-wave activity can lead to lower motivation and limit commitment to the effort.
- Mental fatigue → reduced muscle recruitment
- Lack of motivation → submaximal effort
- Sleep + heart rate coherence → regulation of brain waves
The maximum volume of O₂ the body can consume per minute per kg (ml/min/kg). The higher the VO₂max, the more efficient the aerobic metabolism.
- Limited by cardiac output (HR × stroke volume)
- Depends on capillary and mitochondrial density
- May be limited by the respiratory muscles in elite runners (>72 ml/min/kg)
Maximal Aerobic Speed — the speed in km/h at which VO₂max is reached. The higher the MAS, the greater the performance potential from 1,500 m to 10 km.
- Basis for calculating training paces
- Can be estimated with the Cooper or Vameval test
- Directly linked to VO₂max
The amount of energy needed to run at a given speed. Two runners with the same VO₂max can perform very differently if their economy differs [8].
- Running technique (posture, stride, relaxation)
- Return of elastic energy (Achilles tendon)
- Can be improved through strength training and plyometrics
Inappropriate nutrition and insufficient recovery limit energy stores, accelerate fatigue and prevent physiological adaptations [4,5].
- Lack of carbohydrates → drop in blood sugar during exercise
- Insufficient sleep → incomplete recovery
- Dehydration from -1% → drop in performance
🧪 Estimating your MAS: field tests
VO₂max and MAS can be measured in a laboratory during an exercise stress test, or estimated in the field with simple tests. These data are then used to calculate training paces suited to each zone.
Run the greatest possible distance in 12 minutes, at a steady, maximal pace, ideally on a flat track.
- Start at a high but sustainable pace
- Maintain a constant pace throughout
- Requires a good warm-up beforehand
🧮 MAS = distance (m) ÷ 200
E.g.: 2,400 m → MAS ≈ 12 km/h
Same principle as the Cooper but over 6 minutes — more accessible, ideal for beginners or less-trained runners.
- Run at maximal, constant intensity
- Less tiring than the full Cooper
- Result slightly overestimated vs 12-min Cooper
🧮 MAS = distance (m) ÷ 100
E.g.: 1,500 m → MAS ≈ 15 km/h
A test guided by audio signals (beeps) on a track marked out with cones. Intensity increases in progressive stages.
- Track with cones every 20 m
- Reach each cone on the beep
- Test stops when the pace can no longer be followed
🧮 MAS = last speed completed
Direct result in km/h
GPS watches estimate VO₂max using an algorithm combining pace, heart rate and profile (age, sex, weight).
- Convenient, with no dedicated test effort
- Value influenced by conditions and equipment
- To be considered an estimate — not a measurement
⚠️ Does not replace a field test or an exercise stress test for precise planning.
🏃 Running economy: a decisive factor
Running economy is as decisive a performance factor as VO₂max. An uneconomical runner will consume more oxygen at the same pace, reach their physiological limits sooner and slow down earlier. Conversely, an economical runner delays this fatigue and optimises their efficiency.
🦴 Biomechanical factors
- Technique: posture, step frequency, ground contact time
- Muscle relaxation and segment coordination
- Minimised vertical oscillation
💪 Muscle & tendon factors
- Storage and return of elastic energy (Achilles tendon)
- Appropriate muscle stiffness → limits energy losses
- Neuromuscular coordination
🌍 External factors
- Body weight (the load moved with each stride)
- Shoes: drop, cushioning, sole stiffness
- Type of terrain: road, trail, track
📈 The 5 foundations for progress
Consistency
Run regularly, ideally 3 to 5 times a week depending on your level. Consistency creates lasting physiological adaptations [2].
Endurance and intervals
Alternate continuous phases and intervals to stimulate cardiovascular and metabolic adaptations [6]. Interval training directly improves VO₂max.
Targeted strength training
Improves running economy and significantly reduces injury risk [4,7]. Include it 1 to 2 times a week, focusing on the lower limbs and core.
Technique work
Optimise the distribution of mechanical stress and energy use [5,8]. Running drills, stride work, light plyometrics.
Recovery and nutrition
Essential for physiological adaptations and to avoid overtraining [3]. Recovery is when the body actually adapts to the training load.
⚕️ Physiological thresholds
Running training is based on optimising the energy systems [6,9]. Organising work into intensity zones targets different adaptations: aerobic development, oxygen transport, lactate tolerance and maximal power [9,10].
The intensity at which lactate begins to rise moderately [9].
- ↑ mitochondrial density
- ↑ fat oxidation
- ↑ muscle capillarisation [9,11]
The intensity at which lactate accumulates rapidly [9,10].
- ↑ lactate tolerance
- ↑ the body’s buffering capacity
- Optimises high-intensity performance [10]
The ≤ 10% weekly volume increase rule remains a useful benchmark but is not universal. Individual variability means it must be adapted to each runner.
- Beginner (10 km/week): +1 km is safe
- Expert (100 km/week): +10% = excessive load over the weeks
- To be adjusted according to history and profile
🎯 The 5 training zones
Effort intensity is divided into 5 zones, defined as percentages of heart rate reserve (HRR = HRmax − resting HR):
Target HR = resting HR + % × HRR — This formula is more accurate than HRmax alone because it takes training adaptations into account (lower resting HR) [12].
🫀 Focus: easy endurance
Easy endurance means training below the aerobic threshold (LT1) [9]. It is the essential foundation of any training plan, whatever the target distance.
❤️ Central adaptations
- ↑ Stroke volume
- ↑ Cardiac output during exercise
- ↓ Resting heart rate
- ↑ Blood and plasma volume [11]
🦵 Peripheral adaptations
- ↑ Mitochondrial density
- ↑ Muscle capillarisation
- ↑ Use of fats as a substrate
- ↑ Overall running economy [9,11]
In practice: Zone 1–2 (50–70% HRR) — calm breathing, conversation possible. It should account for 70 to 80% of total volume according to the polarised model [10].
⚖️ Training distribution: the polarised model
The polarised model distributes training volume asymmetrically — a lot at low intensity, some at very high intensity, little in the intermediate zone. Scientifically validated to optimise performance while limiting fatigue and injury risk [10].
Low intensity — easy endurance. Forms the aerobic base. Promotes active recovery between hard sessions.
High intensity — intervals, speed work, VO₂max. Stimulates maximal physiological adaptations at a limited dose.
✅ Key points to remember
Physiological thresholds are the fundamental benchmarks for organising zones and training intensities. Knowing them lets you train with intent rather than at random [9].
Even for a fast runner, the vast majority of sessions should be done at low intensity. It is the foundation on which all other adaptations are built [11].
The polarised model is the most effective distribution according to the scientific literature. Limiting zone 3 helps avoid stagnation and chronic fatigue [10].
The balance between training load and recovery time is decisive. Progress does not come from accumulated fatigue but from the supercompensation that follows rest [3].
Running performance is not a question of raw volume but of organisation: understanding your thresholds, respecting the zones, building a solid aerobic base and giving your body time to adapt. That is what distinguishes the runner who progresses sustainably from the one who stagnates or gets injured.
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