Running Economy Explained: The Hidden Engine Behind Distance Performance

Put two cross country runners on a start line with identical aerobic engines and they can still finish a race far apart. The difference is often running economy, the amount of energy each one burns to hold the same pace. It is one of the most useful and most misunderstood ideas in distance running, so this guide breaks down what it is, why it matters, what shapes it, and what the evidence says you can actually do about it.

What running economy actually measures

Running economy is the energy demand of running at a given submaximal velocity. In the lab it is captured by measuring steady-state oxygen uptake at a set pace, so a runner who uses less oxygen to hold that pace is more economical.[1][3] Think of it like fuel efficiency in a car. Two engines can have the same peak horsepower, but the one that travels farther on a gallon of gas gets you where you are going with less strain.

Because it is expressed relative to body mass, economy lets you compare runners fairly. When body mass is accounted for, runners with good economy simply use less oxygen and energy than runners with poor economy at the same velocity.[3] That efficiency is not a fixed trait. It reflects how your physiology, mechanics, and equipment all interact, which is exactly why it can be trained.[1]

Why it matters as much as VO2max

VO2max, your maximal rate of oxygen uptake, sets the ceiling of your aerobic engine. But among trained runners who already share a similar VO2max, that ceiling stops explaining who wins. In elite fields, running economy is a better predictor of distance performance than VO2max.[3] Researchers have gone so far as to call economy the forgotten factor in elite performance, noting that runners with strong economy outperform peers who have comparable VO2max values.[9]

The practical takeaway for a distance or cross country runner is that once your aerobic base is established, chasing a slightly higher VO2max may return less than improving how efficiently you use the engine you have. Economy and VO2max together, along with the fraction of VO2max you can sustain, describe distance performance far better than any one number alone.[1]

What influences running economy

Economy is not one thing. It is a complex interplay of metabolic, cardiorespiratory, biomechanical, and neuromuscular factors.[1] That is why no single cue or gadget owns it. The main contributors group into a few buckets.

Physiology and muscle

Muscle fiber composition, mitochondrial function, tendon elasticity, and how efficiently your muscles store and return energy all feed into economy.[1][3] Elastic tissues such as the Achilles tendon act like springs, recycling energy from each footstrike so your muscles do less active work. Training that improves how much force your tendons and muscles return per stride tends to show up as better economy.

Biomechanics and technique

Mechanics are the piece runners can see and feel. A review of modifiable biomechanical factors found that better economy is associated with running at a preferred stride length, lower vertical oscillation (less bouncing up and down), greater leg stiffness, maintaining relaxed arm swing, and lower coactivation of opposing leg muscles.[4] The consistent theme is wasted motion. Energy spent moving your center of mass vertically, or braking against the ground, is energy not spent moving you forward.

Cadence, your step rate, ties directly into this. When runners increase step rate modestly, step length, vertical movement of the center of mass, and braking forces all decrease.[8] Overstriding, landing with the foot well ahead of the body, tends to increase braking and vertical travel. These are patterns you can screen for. You can screen your stride to see your cadence and vertical oscillation, and our guides on running cadence and how to fix overstriding walk through the adjustments.

Footwear and surface

Equipment matters too. Lighter shoes reduce the energy cost of swinging the leg, and a firm, compliant shoe and surface interaction is associated with better economy.[4] Shoe mass is a real variable, which is one reason racing footwear tends to be light. That said, the most economical setup is individual, and comfort and fit still matter.

Evidence-based ways to improve it

Strength and plyometric training

This is the most consistently supported intervention. A meta-analysis of controlled trials found a large overall benefit of strength training on running economy in highly trained runners, and recommended a mix of low to high intensity resistance work and plyometrics performed 2 to 3 times per week for 8 to 12 weeks.[6] A broad systematic review of trained middle and long distance runners similarly reported economy improvements in the range of about 2 to 8 percent, with no harm to VO2max.[5] A separate meta-analysis concluded that both explosive training and heavy weight training are effective ways to improve economy, with the largest gains appearing over longer programs.[7]

The likely mechanism is neuromuscular. Stronger, stiffer muscle and tendon units return more elastic energy per stride and stabilize the joints, so less energy leaks into unwanted motion. Our overview of the best strength exercises for runners covers where to start.

Endurance volume and intensity

Consistent aerobic training and a history of high mileage are associated with better economy, and structured harder efforts such as interval and hill work can also contribute.[1][2] The reviews on strategies to improve economy point to several long-term routes, including resistance training and high-intensity running on flat or uphill terrain.[2] None of this replaces base building. It complements it.

Technique and cadence work

Because certain mechanical patterns are associated with better economy, targeted technique work can help, especially reducing overstriding and dialing in an appropriate cadence.[4][8] The caution is that mechanics are individual. A preferred stride length tends to be efficient, so forcing a large, artificial change can backfire.[4] Screen first, adjust gradually, and re-measure.

Putting it together

Running economy is the quiet engine behind distance results. It is the energy cost of your pace, it often matters as much as VO2max once your aerobic base is set, and it responds to training. Build the aerobic base, add consistent strength and plyometric work, keep shoes light and comfortable, and use stride screening to guide cadence and overstriding adjustments. The CritchPitch Run Lab library breaks each of these pieces into practical steps, and screening your stride is a simple place to start.