What Is Running Economy?

Running economy (RE) measures how much oxygen you need to run at a given pace. It's essentially your "fuel efficiency" as a runner—how much energy it costs you to cover each mile.

Two runners with identical VO2max values can have very different race times if one has better running economy. The more economical runner uses less oxygen at the same pace, leaving more in reserve for racing.

Running Economy vs. VO2max

Factor	What It Measures	Analogy
VO2max	Maximum oxygen uptake	Engine size
Running Economy	Oxygen cost at a given pace	Fuel efficiency
Lactate Threshold	Sustainable intensity	Redline RPM

Elite runners excel in all three, but running economy often separates the good from the great.

Why Economy Matters

The Performance Equation

Your race performance depends on:

1. VO2max (your ceiling)
2. Threshold (% of VO2max you can sustain)
3. Economy (how fast you go per unit of oxygen)

Improving economy means running faster at the same effort, or the same pace with less effort. Both are valuable.

Economy and Distance

Running economy becomes increasingly important as race distance increases:

Distance	Economy Importance
800m	Moderate
5K	High
Half Marathon	Very High
Marathon	Critical

In the marathon, you're running for hours at submaximal effort. Small improvements in economy compound over 26.2 miles.

Factors That Affect Running Economy

Trainable Factors

Running form:

• Shorter ground contact time
• Higher cadence (typically 170-180+ spm)
• Minimal vertical oscillation
• Relaxed upper body

Strength and power:

• Stronger tendons store and return energy
• Better hip extension
• Improved core stability

Training specificity:

• Economy improves at paces you practice
• Consistent mileage develops efficient patterns
• Speed work improves neuromuscular coordination

Body composition:

• Lower body fat improves power-to-weight ratio
• Excess muscle mass can decrease economy
• Optimal weight varies by individual

Less Trainable Factors

Limb length:

• Longer legs = longer levers = different mechanics
• Neither better nor worse—just different optimal form

Tendon stiffness:

• Stiffer tendons store more elastic energy
• Partially trainable, partially genetic

Muscle fiber composition:

• More slow-twitch fibers = better endurance economy
• Largely genetic

External Factors

Shoes:

• Lighter shoes improve economy (~1% per 100g)
• Carbon-plated shoes provide 2-4% improvement
• Trade-off between support and weight

Terrain:

• Flat surfaces most economical
• Soft surfaces (sand, grass) cost more energy
• Hills change optimal mechanics

Temperature:

• Economy decreases in heat
• Cooling effort diverts energy from running

Improving Running Economy

Training Strategies

Consistent mileage: Running more miles at easy pace ingrains efficient movement patterns. This is the foundation of economy improvement.

Strides and drills: Short accelerations (20-30 seconds) improve neuromuscular coordination and running mechanics.

Hill sprints: 10-15 second maximal hill efforts develop power and strength relevant to running economy.

Strength training: Heavy lifting (squats, deadlifts, lunges) improves force production and tendon stiffness.

Plyometrics: Jumping exercises train the stretch-shortening cycle used in running.

Form Improvements

Cadence: If your cadence is below 165 spm, gradually increasing toward 170-180 may improve economy. Don't force drastic changes.

Posture: Slight forward lean from ankles (not waist), tall spine, relaxed shoulders.

Arm swing: Arms drive the legs. Efficient arm swing is forward-backward (not across body), relaxed but purposeful.

Foot strike: Land with foot under (not ahead of) your center of mass. Foot strike pattern matters less than where you land.

Use the Running Cadence Calculator to estimate your optimal cadence.

Strength Training for Economy

Key exercises:

• Squats and deadlifts (heavy, low rep)
• Single-leg exercises (lunges, step-ups)
• Calf raises (eccentric emphasis)
• Core stability (planks, pallof press)
• Plyometrics (box jumps, bounds)

Programming:

• 2x per week during base phase
• 1-2x per week during race-specific training
• Focus on maintenance during taper

Economy Across Distances

Why 5K Economy Differs from Marathon Economy

Running economy is pace-specific. You become most economical at paces you frequently practice.

Short distance specialists:

• Economical at faster paces
• May be less efficient at slow marathon pace
• Higher cadence, more power output

Marathon specialists:

• Economical at slower paces
• May struggle with 5K leg turnover
• Optimized for sustained effort

This is why training should include the paces you'll race at.

Elite Running Economy

How Efficient Are Elites?

Elite distance runners typically use 30-35 ml of oxygen per kilogram per kilometer. Recreational runners may use 40-50+ ml/kg/km.

This means elites can run the same pace using 20-30% less energy—a massive advantage over long distances.

Kenyan and Ethiopian Runners

East African runners often have exceptional economy due to:

• Long, thin legs (lighter to swing)
• High-altitude development (more efficient oxygen use)
• Lifetime of running (ingrained efficient patterns)
• Favorable biomechanics

These advantages compound—even at similar VO2max, economy differences explain performance gaps.

Testing Running Economy

Laboratory Testing

True running economy testing requires:

• Metabolic cart measuring oxygen consumption
• Standardized treadmill test at multiple speeds
• Professional sports lab setting

This provides precise measurements but isn't practical for most runners.

Field Estimation

This calculator estimates economy using:

• Race performances at different distances
• Body composition (height, weight)
• Known relationships between speed and oxygen cost

A runner who performs relatively better at longer distances likely has better economy (their efficiency advantage compounds over distance).

Self-Assessment Signs

Signs of good economy:

• Longer distances feel relatively easier than short
• You can maintain pace late in races
• Heart rate stays stable at steady paces
• You don't feel like you're working hard at easy pace

Signs of poor economy:

• Short distances feel relatively easier
• You fade significantly in long races
• Easy pace feels harder than it should
• High heart rate at moderate paces

Economy vs. Speed: A Trade-Off?

There's often tension between absolute speed and running economy:

Speed-focused training:

• Higher power output
• More fast-twitch fiber recruitment
• May sacrifice some economy for speed

Economy-focused training:

• More efficient patterns
• Better endurance
• May sacrifice some top-end speed

Most runners benefit from developing both, with emphasis shifting based on goal race distance.

The Long View on Economy

Running economy improves slowly over years of consistent training. Unlike VO2max (which responds quickly to training), economy requires:

• Thousands of miles of running
• Gradual adaptation of tendons and muscles
• Refinement of movement patterns
• Strength development

This is why experienced runners often race better than their VO2max would predict—they've developed efficiency that takes time to build.

Track your training consistency with the Weekly Training Log to build economy over time.