Health⏱ 5 min read
What Is Running Economy and How to Calculate It
Running economy is the oxygen cost of running at a given speed. It explains why two runners with identical VO2 max can have very different race times -- and how to improve it.
Elite runners often win on running economy rather than VO2 max. A runner who uses 10% less oxygen per kilometre can sustain faster speeds at the same effort level -- and running economy is more trainable than VO2 max in experienced runners.
Defining Running Economy
Running economy (RE) = oxygen consumption at a standard speed
Usually measured as: ml O2 / kg / km at 4:30/km (or another standard pace)
Lower RE value = more economical (using less oxygen per km)
Elite distance runners:
RE: 170-210 ml/kg/km at 4:00-4:30/km pace
Recreational trained runners:
RE: 220-260 ml/kg/km at same speeds
A difference of 30 ml/kg/km in RE:
At 5:00/km (200m running), oxygen consumption:
Economical: 200 x 0.17 L/min (170 ml/kg/km at 12km/h)
Uneconomical: 200 x 0.22 L/min
On a 10km run: economical runner uses ~10% less oxygen
This translates to roughly 3-5% faster sustainable speed
Calculating Functional Running Economy (Field Test)
Without a lab, estimate RE using lactate threshold pace:
Runners with better RE maintain higher % of VO2 max at threshold.
Practical proxy: Running Efficiency (RE proxy)
= Race pace / VO2 max equivalent
5km race time: 22:00 (4:24/km)
VO2 max estimated at 50 ml/kg/min
Oxygen cost at 4:24/km is approximately 46 ml/kg/min
(from standard running tables -- 4:24/km ~ 13.6 km/h ~ 46 ml/kg/min)
RE utilisation = 46 / 50 = 92% VO2 max at threshold
This is high -- indicates good running economy for this person.
Poorly economical runners may use 97-100% VO2 max at the same pace.
Factors That Affect Running Economy
- Cadence: 170-180 steps/minute is optimal for most runners. Lower cadences correlate with overstriding and higher ground contact time -- both reduce economy.
- Vertical oscillation: Runners who bounce excessively waste energy moving up and down rather than forward. Elite runners typically oscillate 6-8cm; recreational runners often 8-12cm.
- Footwear: Carbon-plate shoes improve running economy by 2-4% in most runners. This is the largest single equipment gain available.
- Strength training: Heavy strength training (squats, deadlifts, plyometrics) improves neuromuscular stiffness and RE by 2-8% in trained runners.
- Flexibility (inverse): Very flexible runners often have worse RE -- a stiffer musculotendinous system stores and returns elastic energy more efficiently.
Improving Running Economy: Evidence-Based Protocols
Plyometric training (most evidence):
Jump squats, box jumps, bounding: 2x per week for 6-10 weeks
RE improvement: 2-8% in trained runners
High-cadence running drills:
Run at 5-10% above current cadence for 20-30 sec intervals
Cue: "quick feet", shorten stride, maintain speed
6-8 weeks of practice: typically gains 2-4 spm in natural cadence
Strength training (heavy compound):
3-4 sets of 4-6 reps at 80-90% 1RM
Squats, deadlifts, leg press
RE improvement: 3-7% after 8-12 weeks