What is Calibration?

Calibration is the very first thing we walk new users through in the app (right after Core pairing!) because it’s the foundation that our metrics are based on. Calibration is the process of finding a relationship between measured values to standardize the output and relate the metrics to a known range. In a nutshell, the Athos calibration process transforms raw EMG data into valuable metrics that are easy to analyze and are applicable for everyday training and exercise.


How Does it Work?

The calibration standard used in EMG research is typically based on a MVC (maximum voluntary contraction), so we have created a short set of exercises that will help you approach your maximum muscle activity for the muscle groups we track. This allows us to create a realistic and personal muscle effort scale (0-100%) in the app, with 100 being your “max” baseline for that muscle.

Now, you may notice muscle effort rise above 100 during your first few sessions. This means you’ve exceeded the “baselines,” or predictions, we’ve set for the muscle during your calibration. As you continue to train and progress (usually just a couple more 10+ minute sessions), we’ll bump your “baselines” up and adapt to your new levels. We now “adapt” calibration as you go, so if we set it “too low”, it will adjust after 2-3 sessions.


What happens if I skip calibration?

We offer the option to skip calibration if you’re in a hurry and just want to get to your workout, but we strongly encourage you to go through the calibration exercises, if possible. Since the Athos app is adaptive, it will update your baseline levels each time you work out, but this process takes time. For more fine-tuned readings right away, set aside ~8 minutes to go through the calibration steps before moving on to your workout. We promise it’s worth it!


Need Help?

If you see data that appears “off”, try to do a longer (10+ minute) workout so the sensors have plenty of time to adapt to your levels. The more often you recalibrate, the more often your sensors have to re-adjust to your body. Adjusting takes a bit of time, so we recommend not recalibrating over and over again and instead giving the sensors a few workouts to do their thing. If you’re still seeing “off” data after a few 10+ minutes workouts, feel free to reach out to our Support Team and we’re happy to check out the data on our end to see what might be going on.

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