Why your breathing feels like it's affecting your running

When you run, you may expect your legs to tire first.

But for many people, it’s their breathing that gives up before anything else.

Do you recognise this feeling?

• You can’t quite get enough air in

• Your breathing becomes rushed or out of control

• You have to stop, not because your legs are tired but because your breathing feels off

If that sounds familiar, it’s worth knowing this isn’t always about fitness and it’s not always a lung problem either!

When your breathing doesn’t match your fitness

One of the most common things we hear is:

“I feel like I should be able to run more but my breathing won’t let me.”

That mismatch where your body feels capable but your breathing doesn’t keep up often points to an issue with how you’re breathing, rather than how fit you are.

This can happen even when:

• Lung function tests are normal

• Oxygen levels are normal

• There’s no diagnosis like asthma

Which is why it can feel confusing and, at times, frustrating.

What should happen when you run?

As your running intensity increases, your breathing needs to adapt. It should naturally speed up, but still remain controlled and coordinated. For this to happen effectively, your breathing needs to stay in rhythm with your stride, be driven primarily by the diaphragm and increase in rate without becoming chaotic. It also relies on relaxed posture and controlled movement to allow the rib cage and lungs to expand properly.

When all of these elements work together, breathing feels much more manageable - even as the effort increases.

Why breathing can break down

Breathing can begin to affect your running ability because your breathing pattern isn’t as efficient as it could be.

Some of the most common things we see include:

• Switching to mouth breathing too early - this can lead to faster, less controlled breathing from the start

• Upper chest breathing - where the neck and shoulders do more of the work instead of the diaphragm

• Loss of rhythm - breathing becomes out of sync with your running pace

• Holding your breath under effort - especially when pushing harder or running uphill

• Tension through the upper body - which limits rib cage movement and makes breathing feel restricted

  
  

Individually these may seem small, but together they can make running feel much harder than it should.

Where nose breathing fits in

At lower intensities, breathing through your nose can help keep things controlled.

It tends to encourage:

• A steadier breathing rate

• Better diaphragm involvement

• Less tension through the upper body

As intensity increases, it’s normal for mouth breathing to come in - that’s not the issue. The problem tends to be when mouth breathing becomes the default from the very start.

If your breathing feels difficult when running, it’s easy to assume:

• You just need to get fitter

• You’re not “good at running”

• Or something must be wrong with your lungs

But if tests come back normal, you’re often left without a clear explanation.

That’s because standard tests don’t look at how your breathing is working in real time, especially during movement.

How the Breathing MOT can help

At the Breathing MOT the focus isn’t just on whether your lungs are working. It’s on how your breathing system behaves, particularly under load.

During a session, we look at:

• Your breathing pattern and rhythm

• Whether you’re relying on mouth or upper chest breathing

• How your breathing coordinates with running or movement

• The role of posture and muscle tension

The aim is simple: to give you clarity on what’s going on, so you know what to do next.

If your breathing feels like it's holding you back when you run, understanding why is the first step to improving it. Book here now or email us at enquiries@airphysiotherapy.co.uk or call 020 7971 1464 if you'd like to know more.