We use information saved using cookies to ensure maximum convenience in using our website.



1. I can't log in to my account.

The following suggestions can help you identify the reason:

• Did you verify your email after registering your account?
• Make sure you are connected to the Internet.
• Check if after automatically inserting an e-mail from the phone dictionary, there is no "space" behind the e-mail, which causes the wrong format of the entered e-mail address.

2. The app does not find devices via Bluetooth.

When you first launched the app, did you allow access to Bluetooth and location information?

If not, allow access to Bluetooth and GPS location in the phone settings and restart the app.

3. I can't start a workout.

To begin with, do the INTRO TRAINING, to know the extent of your oxygenation. This workout is described on our channel on YouTube Q-LAC run.

If you do not want to perform the INTRO training at the beginning, run it for a few seconds, save in memory by clicking "SAVE" – then all modes will be available.

4. How to correctly position the sensor?

Primary placement is 1/3 of the height of the lateral head of the quadriceps.

Alternative placement is 1/3 of the height of the middle head of the quadriceps muscle.

You can find more about this in the instructions in the video called "5. Correct mounting + collecting references".

Click here to see the video instructions.

5. How long does the reference take and how to make it?

The reference lasts exactly 60 seconds. At this time, it is worth not to move, take a loose position without tensing the muscles. In the process of collecting references, the values should not change by more than 1-2%. If the values increase, decrease or "wave" by more than 1-2%, it is worth repeating the reference. This may be related to some work that the muscles have done before starting the measurement, e.g. walking up the stairs.

You can find more about this in the instructions in the video called "5. Correct mounting + collecting references".

Click here to see the video instructions.

6. Why aren't my performance zones being determined correctly?

Most likely, it is necessary to make a calibrationto indicate the intensity zones accordingly. To do this, perform the calibration training described in the instructions in the video under the name "Algorithm calibration mode – tips".

Click here to see the video instructions.

If you do not have the opportunity to take a blood measurement, do a workout where you will go through low, medium and high intensity. Send it to us to the following address: pomoc@q-lac.pl with a password description of the training performed and a screenshot of the training from the historical preview. Approximate information about the intensity at which you have exceeded the lactate threshold so far will also be very helpful for us.

Based on this information, we will come back to you with information about the value that should be entered into the calibration mode so that the zones are determined accordingly.

7. During training, I see an increase in value instead of a decrease, for what reason?

• Pay attention to whether during the collection of 60 seconds of references, the % values did not change significantly (change>5%). If so, it is worth paying attention to it during subsequent trainings.

• Check if the sensor has not been placed too high or if the sensor has not moved up the muscle during the measurement.

• If the problem occurs cyclically, it is worth considering changing the location of the sensor to an alternative location (see above – "Where to place the sensor correctly?").

• If none of the above changes bring improvement, please contact us at: pomoc@q-lac.pl.

8. Does moving the sensor during training have any impact?

• Moving the sensor by 0.5-1cm during training, except in extreme cases, does not matter much.

• Moving the sensor by more than 2-3cm can have a significant impact on the quality of the measurement, which is why the correct mounting is so important.

9. Does it matter on which leg I place the sensor?

How the muscles work in both legs is never 100% identical. Therefore, for the sake of repeatability of measurements It is always worth doing workouts with a sensor on the same leg. If for some reason this is not possible, try to place the sensor in a place corresponding as exactly as possible to the same location on the other leg.

has been added to the cart. Cart