The Mental Side of Endurance: Beating Mile 20

28 Oct 2026
3 min read

Mile 20. The legs are heavy, the finish is still miles away, and the body says stop.

On Sunday, tens of thousands of runners will reach that point at the TCS New York City Marathon.

What gets many through is less about their legs and more about what they say to themselves. That is the mental side of endurance.

Self-talk: verdicts versus instructions

  • Unhelpful: “I can’t do this.” That is a verdict. It gives you nothing to do.
  • Helpful: “Relax your shoulders.” “Short, quick steps.” These are instructions that point to a clear next action.

The shift is small, and anyone can practice it on a hard run, a tough set or a long day.

Chunking

Twenty-six miles is too big to hold in the mind. Chunking breaks it up: get to the next marker, then the next.

Swimmers use it by the lap, rowers by ten strokes, runners by the next landmark. Each finished chunk is a small win.

Skills you can use alone

Endurance sports mean long hours on your own, with little a coach can say during the effort.

Mental tools have to be ones you can run yourself: a self-talk script, a chunking plan and a breathing cue.

Try it

  1. Choose one instruction phrase for the hardest part of your next workout.
  2. Break the effort into chunks you can name.
  3. Rehearse both when you are already tired.
  4. Afterward, note what worked.

Cross country, distance, swimming and rowing athletes rarely get regular mental skills support.

Short audio sessions they can play on their own time help close that gap, and OMP offers exactly that to athletes and the teams behind them.

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