How do I know if I am overbreathing?

Common signs are a resting breathing rate above 16 per minute, a BOLT breath-hold score under 20 seconds, chest or mouth breathing at rest, frequent sighing, and a Nijmegen score of 23 or more.

What is a good BOLT score?

A BOLT score above 30 seconds suggests good CO₂ tolerance. Scores under 20 seconds are common in people who chronically overbreathe.

Can chronic overbreathing be fixed?

Yes. Breathing retraining with nasal breathing, slow breathing at around 6 breaths per minute, and lighter breaths helps most people within 4 to 8 weeks.

Chronic Overbreathing Test: 4 Simple Checks at Home

Name: Breathe On
Author: Breathe On

Chronic overbreathing is easy to miss. There is no dramatic attack, just a steady habit of breathing a little more than you need. These four checks take about 10 minutes and give you a clear picture.

They are screening tools, not a diagnosis.

Before you start

Sit quietly for 5 minutes. Avoid testing right after exercise, caffeine or a meal. Test at the same time of day if you repeat it.

Check 1: Resting breathing rate

Set a timer for 60 seconds. Count each inhale without changing your breath.

8–12 breaths per minute — calm and efficient
12–16 — typical
Above 16 at rest — may suggest overbreathing

Count on three different days for a fair result.

Check 2: BOLT breath-hold score

The Body Oxygen Level Test (BOLT) estimates your tolerance to CO₂.

Breathe normally through your nose for a minute.
After a normal exhale, gently pinch your nose.
Count the seconds until you feel the first clear urge to breathe.
Release and breathe normally. Your next breath should be calm.

Under 20 seconds — suggests low CO₂ tolerance, common in overbreathing
20–30 seconds — moderate
Above 30 seconds — good

Do not push to your limit. This is not a breath-hold contest. Skip this check if you are pregnant or have heart or lung conditions without medical advice.

Check 3: Breathing pattern

Place one hand on your chest and one on your belly. Breathe normally for a minute and notice:

Does your chest move more than your belly?
Do you breathe through your mouth at rest?
Do you sigh or yawn often (more than 12 times an hour)?
Are there short pauses or gasps?

Two or more "yes" answers point to a dysfunctional breathing pattern.

Check 4: Nijmegen questionnaire

The Nijmegen questionnaire is a validated 16-item list of symptoms such as tingling, chest tightness and dizziness. Each item is scored 0–4. A total of **23 or higher** out of 64 suggests hyperventilation syndrome.

Reading your results

If two or more checks point toward overbreathing, breathing retraining may help. Many people improve within 4–8 weeks of daily practice.

What to do next

Breathe through your nose during the day and at night.
Practise slow breathing at about 6 breaths per minute for 5 minutes daily.
Breathe lighter, not deeper — aim for soft, quiet breaths.
Retest weekly and note changes in your BOLT score and rate.

How Breathe On helps

Breathe On logs your breathing rate, pathway and symptoms after each session. Over time it shows trends, so you can see whether your overbreathing is easing.

Medical disclaimer

These checks are for education and self-awareness only. Breathlessness, chest pain or dizziness can have medical causes. Please see a healthcare provider for diagnosis.