100 of 100 early-access places left · closes 31.08 — get 12 months free
BreezeLabs
Early access · only 100 runners · closes 31.08

Stop estimating.
Start measuring.

Make every run count.

Lab-grade VO2max, fat burning zone, lactate threshold and breathing-rate measurements on your Apple Watch or Garmin — using only your phone and earphones.

  • Lab-grade results
  • No lab
  • No mask
  • No extra dedicated hardware
Get 12 months free → See how it works

100 of 100 places left · a CHF 119 value, free · no payment details needed

Backed by ETH Zurich Innosuisse Insel Gruppe
100

Limited to the first 100 runners. Twelve months of BreezeTracking free. Five of them will be drawn to receive 2 months of personalised breathing-based coaching.

BreezeTracking app showing breathing rate charts
Measured, not estimated
VO2max
58.4
ml/kg/min
Fat burning zone
146
bpm
Lactate threshold
171
bpm
BRPM
42
breaths/min
Lab-grade measurements
No extra dedicated hardware
Apple Watch + Garmin
Built on years of breathing-detection research
01 Why breathing

Your watch sees pace and heart rate. Your breathing reveals effort.

BreathingPace

Hilly terrain

A slower pace uphill can require much more effort than a faster pace downhill. Breathing helps reveal the effort behind the pace.

BreathingHeart rate

Intervals

Breathing reacts quickly when a work interval or recovery begins, while heart rate responds with a delay.

drift
BreathingHeart rate

External influences

Heat, stress, caffeine, fatigue, hydration and cardiovascular drift may influence heart-rate readings. Breathing provides an additional view of effort.

02 How it works

Your performance lab, built into every run

No lab visit, no breathing mask and no extra dedicated hardware.

01

Install BreezeTracking

Set up the app on your phone and on your Apple Watch or Garmin.

02

Connect and run

Pair your earphones and start a supported normal or graded run.

03

Review your measurements

After the run, review your breathing and performance measurements in the app.

You can keep listening to music or podcasts while BreezeTracking measures your breathing.

03 Measurements

Four lab-grade measurements from your own running.

VO2max
maximal oxygen uptake

Understand aerobic capacity and monitor endurance development.

Fat burning zone
fat burning zone

Identify the intensity range for easy and sustainable training and help determine the personalised fat-burning zone.

Lactate threshold
lactate threshold

Use your lactate threshold to guide threshold sessions, higher-intensity training and race pacing.

Breathing rate
BRPM

Show breathing-rate evolution, average BRPM, time at different breathing frequencies, duration, distance and the colour-coded route map.

04 Run modes

One app. Two ways to understand your running.

Normal run

Run at your usual planned pace and see the breathing behind it.

  • Usual planned pace
  • Breathing-rate evolution
  • Average BRPM
  • Time at different breathing frequencies
  • Duration and distance
  • Colour-coded breathing map

Graded run

A progressive test that unlocks your lab-grade measurements.

  • Starts at an easy pace
  • Becomes progressively faster
  • Continues until you cannot maintain the required intensity
  • Duration varies according to fitness
  • Flat terrain is recommended
  • One valid graded run gives the available VO2max, fat burning zone, lactate threshold and breathing-rate measurements
05 Inside the app

Every run gives you accurate information.

Route and breathing together
06 Research

The science existed. Accessible technology did not.

Personalised zones from your fat burning zone and lactate threshold can guide training more individually than generic heart-rate percentages.

Read more about the study

Personalised training zones built from the fat burning zone and lactate threshold can provide more individual guidance than generic percentages of heart rate.

In a small 12-week randomised study, exercise prescribed from ventilatory thresholds was compared with training based on percentages of heart-rate reserve. All 12 participants in the threshold-based group met the study’s VO2max responder criterion, compared with 5 of 12 in the heart-rate-reserve group.

This is encouraging preliminary evidence from a small sample, not a guarantee of individual results.

Read the study

Traditionally this required

  • A sports laboratory
  • A breathing mask
  • Specialist testing
  • Expensive equipment
  • Or lactate testing

Your earphones capture the breathing signal.

Your phone supports the analysis.

Your watch integrates the measurement into the run.

Partners and collaborators
07 Benefits

Make limited training time work harder.

Train in personal zones

Use your own measured fat burning zone and lactate threshold instead of generic heart-rate percentages.

Make every run count

Know whether a session was truly easy, threshold or hard.

Prepare for a race, challenge or PB

Pace long efforts against a measured threshold.

Track progress

Repeat a graded run and see how your measurements move.

Train with confidence

Effort you can see, not effort you guess.

Early access

Be among the first 100.

Twelve months of BreezeTracking free — a CHF 119 value. No payment details, no commitment.

  • 12 months free (CHF 119 value)
  • Early access
  • Lab-grade measurements
  • 5 drawn for 2 months personalised breathing coaching

100 of 100 places left · Closes 31.08

When they are filled, this early-access offer closes.

Get 12 months free
08 Waitlist

Get 12 months free.

The first 100 eligible runners accepted from the waitlist receive 12 months of BreezeTracking free — a CHF 119 value. 100 of 100 places left, closes 31.08.

Early access supports Apple Watch and Garmin. Other watches can join the list and we will contact you when support is ready.

What happens next: you get one confirmation email straight away, then your code to download the app for free on 31.08. Tick the box and you also get occasional updates from us — unsubscribe any time.

We store your name, email and watch type to run the early-access programme. BreezeLabs AG is the controller; you can withdraw consent or have your data deleted at any time. See our privacy policy.

09 FAQ

Before you join.

What do I need to use BreezeTracking?

A phone with the BreezeTracking app, earphones and an Apple Watch or Garmin. No lab visit, breathing mask or extra dedicated hardware is required.

How do I get my VO2max, fat burning zone and lactate threshold?

From one valid graded run. Start at an easy pace, get progressively faster and continue until you can no longer maintain the required intensity. Flat terrain is recommended.

Is the fat burning zone always available?

Not yet. The fat burning zone is currently successfully identified for approximately 60% of users. VO2max, lactate threshold and breathing rate are available after one valid graded run.

Can I still listen to music while it measures?

Yes. Music or podcasts can continue playing while BreezeTracking measures your breathing through earphones.

How is this different from heart-rate training?

Breathing adds a faster, effort-related signal alongside heart rate. Heart rate remains useful — breathing gives you an additional, more immediate view of effort.

What does the early-access offer include?

The first 100 eligible runners accepted from the waitlist receive 12 months of BreezeTracking free, plus early access and the opportunity to help shape the product.

Stop estimating. Start measuring.

Make every run count.

Get 12 months free
Get 12 months free

100 of 100 places left · closes 31.08