5k Breathing: How Should I Breathe When Running A 5K

Sparklers with a slow shutter speed.
Nothing at all to do with breathing. But pretty.

Breathing is key to getting oxygen into your body! Your body ultimately uses it to ‘burn’ the energy stores (carbs) in your body to produce energy.

If you are finding it really hard to breathe then, simply, you are probably running too fast. Slow down. Most of you reading this article will be beginner runners and therefore you should be focusing on distance work at a speed where you can maintain a conversation. By definition, breathing will not be difficult at this speed.

For the more advanced runner then consider the following:

1. your mouth is bigger than your nose. So use it to breathe.

2. A large amount of the capacity of your lungs is not used. Therefore it probably doesn’t matter too much what you are doing.

3. Breathing is mostly subconscious. Get it right and it becomes natural. Personally, I’d breathe in over the count of a couple of footfalls and then out over a couple. Get into a rhythm.

Last Updated on 2 October 2026 by the5krunner


Small things I always use

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  • NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
  • Google Wifi: Keeps Zwift connected in my pain cave. I use it.
  • Apple TV 4K: Zwift on the big screen. I use two.
  • Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.

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