Scroll down to get started with your muscle oxygen sensor.

Train.Red FYER start guide

1 - unboxing
2 - charge
3 - get started
4 - download the app
5 - smartphone app
6 - place the sensor
7 - measurement
8 - use your data
9 - learn and improve


- unpack sensor
- install app
- attach & connect sensor
- ready to go

1 - Unboxing

Your package contains the following items:

- The Train.Red FYER
- Charging cable
- Patch Pack (20 patches)
- Strap Pack (S-M-L)
- Durable eva-pouch

to charge, charging, charged
2. Charge

- Use included charging cable
- Insert the charging cable with care
- The green LED is solid while charging
- A full charge takes up to 2 hours
- The FYER is fully charged when the green LED stops and goes into advertising mode (blue LED blinking)
- You can measure up to 6 hours on a full charge.
- When the blue LED is blinking, the FYER advertises, this stops when you insert the charging cable.
- The FYER resets when you plug in the charging cable.

how to get
3 - get started

- Make sure you're charged (you, and your battery).
- When the blue led is blinking the sensor is on and ready to connect
- Download and install the Train.Red APP in the Google Play Store (step 4).

coming soon
4 - Download the app

The app can be dowloaded from this link. Make sure you have a phone with at least android 6.0 and more than 200 Mb of storage.

With the Train.Red app you can:
- Connect up to 4 sensors
- Connect a heartrate sensor
- View live data
- View live features
- Analyze and export your data

Train.Red android app
5 - First use of app

Start the app and follow the instructions on the screen. Make sure Bluetooth is enabled. Create a profile and add some required details to get started.

- profile settings
- system settings
- overview of previously monitored workouts
- quick options to select type workout
- quick option to select sensors
- start button

6 - Place the sensor

The FYER can be worn everywhere on your body and the app currently saves 8 locations. Select and connect your sensor in the 'connect sensor' section of the smartphone app. You can connect up to 4 Fyer's and 1 HR sensor at once.

How to strap the sensor:
- Choose the right strap length
- Position the sensor directly on your skin, and place it on the belly of your muscle for maximal results.
- Pull the strap nice and tight, but do not compress your skin.
- OPTIONAL: Standardise placement and protect from ambient light with the Train.Red patch
- Check your sensor placement with our position check in the app

start and stop a measurement
7 - Measure

- select your type of sport and workout
- make sure you selected and positioned the desired sensors
- start measurement via the play button
- wait until sensors are connected
- app switches to the live-measurement overview (an overview of data and features)
- by tapping the feature, the user can enlarge the desired feature.
- go and be ahead
- press the stop button if you want to stop recording
- the app shows a quick summary of your training

8 - use data

Currently, we are still working on some of the desired features. For now, you can view a summary of each training via the app. If you want to analyze your sessions, you can also export the training to a FIT or CSV file:

Muscle oxygen data
- Muscle states
- TSI% (percentage of available oxygen in your muscles)
- Oxy and deoxyhemoglobin changes
- HbDiff (difference between oxy and deOxy hemoglobin)
- total hemoglobin

And some extra information e.g. battery status, temperature data, time stamps and BLE quality.

use data to optimize your performance
9 - Learn and improve
10 - Cleaning

Clean the sensor by using a soft cloth, moistened with a non-aggressive general purpose cleaner (e.g., alcohol). Do not spill any liquid onto the instrument.