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Does Drafting Work in Running?

2026-06-07 · 4 min read

Rapid answer

Yes, drafting works in running. Tucking behind another runner cuts the energy cost of air resistance by up to about 80 percent, which is worth roughly 1 to 4 percent of your total energy at distance-running speeds and more into a headwind. It matters far less than in cycling because air resistance is a small share of running's total cost, but at race pace it is real and free.

Every cyclist knows drafting is a huge deal: sitting in a bunch can cut your power by 30 percent or more. Runners are told air resistance barely matters. The truth sits in between. Drafting absolutely works in running, the savings are just smaller and easier to overlook, which is exactly why the elites who chase records guard them so carefully.

How much does drafting save in running?

Drafting behind another runner reduces the energy you spend overcoming air resistance by up to about 80 percent when you tuck in close. Because air resistance is only a small fraction of running's total energy cost (roughly 2 to 8 percent at distance-race speeds), the net saving is about 1 to 4 percent of total energy on a calm day, rising with speed and dramatically into a headwind.

The classic measurement comes from physiologist Griffith Pugh, who found that running one meter behind another runner at middle-distance speed cut the oxygen cost of air resistance by around 80 percent and reduced total energy cost by roughly 6 percent at those faster speeds. At slower marathon paces the share of energy going to air resistance is smaller, so the net benefit is lower, in the low single digits, but still meaningful over 26.2 miles.

Situation Approx energy saved by drafting Why
Marathon pace, calm ~1 to 2% Air resistance is a small share of cost
Half / 10K pace, calm ~2 to 4% Faster speed, more air resistance
Any pace into a headwind Much higher Wind multiplies the resistance you avoid
Slow easy run Negligible Very little air resistance to begin with

When drafting matters in a race

The faster you run and the windier it is, the more drafting pays. Air resistance rises with the square of your speed relative to the air, so a headwind both increases the cost of leading and increases the savings of sitting behind someone. On a still day at an easy pace, drafting is close to irrelevant. At 10K race pace into a 15 mph headwind, it can be the difference between holding contact and getting dropped.

This is why the sub-two-hour marathon attempts were built around drafting. Nike's Breaking2 and the later INEOS 1:59 Challenge used rotating formations of pacers arranged in a precise wedge around the runner specifically to shield him from air resistance, contributing a meaningful share of the energy savings that made the time possible.

How to use drafting on race day

  • Tuck in close and directly behind. The benefit falls off quickly as you drift to the side or open a gap; one to two meters directly behind is the sweet spot.
  • Use it most into the wind. Save your turns at the front for sheltered sections and sit in when the wind is in your face.
  • Share the work in a group. Rotating the lead spreads the cost so the whole pack runs faster than any individual could alone.
  • Account for it in your pacing. If you have been drafting all race, leading the final stretch costs more than your splits suggest. Plan your finish accordingly with the marathon time predictor.

For the cycling side of the same physics, where the savings are an order of magnitude larger, see how much drafting saves in cycling.

Frequently asked questions

Is drafting allowed in running races?

Yes. Unlike non-drafting triathlons, road and track running have no rule against running behind another competitor, and pacing within the rules of a given race is common. Drafting off another runner is a normal, legal part of racing strategy.

How much faster does drafting make you in a marathon?

On a calm day, drafting saves roughly 1 to 2 percent of energy at marathon pace, which can translate to a small but real time difference over 26.2 miles. Into a headwind the benefit grows substantially. It is most useful for staying with a pack and sharing the wind rather than as a large standalone speed boost.

Why does drafting help so much more in cycling?

Because cyclists move much faster and air resistance is the dominant force they fight, often most of their total energy output. In running you move slower and most of your energy goes into the mechanics of each stride, so air resistance, and therefore drafting, is a much smaller piece of the puzzle.

Sources

Predict your marathon time