Running Economy Calculator

Running economy (RE) measures the oxygen cost of running at a given speed — typically expressed in mL O₂/kg/km. A lower value means you burn less energy per kilometer, translating directly into faster sustainable race paces. RE varies by 30–40% between runners of equal VO₂max and is influenced by biomechanics (cadence, ground contact time, vertical oscillation), footwear (carbon-plate shoes improve RE by 2–4%), terrain surface, and gradient. This tool estimates your metabolic cost from biomechanical inputs and shows where to focus for the biggest efficiency gains.

Frequently asked questions

What is a good running economy?

Elite distance runners typically have an RE of 0.170–0.185 mL O₂/kg/m. Well-trained recreational runners range from 0.195–0.210. Values above 0.220 suggest room for biomechanical improvement. RE improves with consistent training, strength work, and optimized cadence.

Do carbon-plate shoes improve running economy?

Yes. Carbon-plate racing shoes (like the Nike Vaporfly) improve running economy by approximately 2–4% through foam energy return and the carbon plate's lever effect. At marathon pace, a 3% RE improvement translates to roughly a 2% speed increase — about 2–3 minutes over a full marathon.

Does cadence affect running economy?

Cadence influences RE, but most runners self-optimize within 3% of their ideal stride frequency. Artificially increasing cadence beyond your natural range can increase energy cost. The key is reducing overstriding (excessive ground contact time and braking forces) rather than targeting a specific cadence number.

Sources

  • Barnes & Kilding (2015). Running economy: measurement, norms, and determining factors. Sports Medicine Open.
  • Hoogkamer et al. (2018). A comparison of the energetic cost of running in marathon racing shoes. Sports Medicine.
  • Moore (2016). Is there an economical running technique? A review of modifiable biomechanical factors. Sports Medicine.

Related glossary terms

  • Running Economy (RE)
  • TEE (Total Energy Expenditure)
  • Minetti Gradient Cost
  • Kinematic Plausibility