Train.Red FYER Sensor - Train.Red
Train.Red FYER Sensor - Train.Red
Train.Red FYER Sensor - Train.Red
Train.Red FYER Sensor - Train.Red

Train.Red FYER Sensor

Regular price€600,00
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Train.Red FYER, improves any sports performance in the smartest way. The FYER is the smallest and most innovative wearable muscle oxygen sensor in the world. 

To improve your performance, you invest time and energy in equipment, standardized training programs, supplements, etc., but often we forget the one thing that drives our performance: our muscles.
Train.Red shines light on your performance based on a light technology, the FYER looks inside your muscles with Near InfraRed Spectroscopy (NIRS). The sensor translates the oxygen saturation and (de-)oxyhemoglobin changes in your muscle tissue into real-time key features with the help of artificial intelligence and a friendly user interface.

The FYER helps any sports enthusiast who wants to improve their performance. Become fitter, faster, and stronger with the help of Train.Red.

Gain strength and/or endurance by using the data from your muscles.

  • Determine if your muscle is working hard, or hardly working. 5 muscle states are visualized in real-time. Stay in the green state during easy sessions, or go in the red during efforts. Learn more
  • Tissue Saturation, the amount of oxygen in your muscle tissue (%). Adjust your pace in real-time or analyze afterward
  • High-performance coach or hobby scientist? Measure the Oxy-, and DeOxyhemoglobin concentration changes, or use the total hemoglobin and hemoglobin difference to your advantage.

Our FYER muscle oxygen sensor comes with:  the Train.Red FYER, a charging cable, one Patch Pack (20 patches), one Strap Pack (S-M-L) all in a durable eva-pouch.


Still got questions? Talk to an expert.
    FYER specs

    Size: 1.2 x 4.4x 5.9 (cm) / .5 x 1.7 x 2.3 (in)

    Weight: 24 grams

    Measure-depth: up to 20mm in your muscle

    Sweat-proof: Yes

    Battery: up to 10 hours during active use

    Connectivity: BLE (Bluetooth 4.2) and ANT+ 

    Material: high-quality biocompatible ABS and TPE

    Compatible with: Android app (iOS app not yet developed)

    3rd party compatibility: VO2 Master Manager (iOS and Android)

    we measure

    NIRS: Near InfraRed Spectroscopy

    TSI%: the percentage of oxygen in your muscles (tissue saturation index)

    02Hb changes: in blood with oxygen (oxyhemoglobin) 

    HHb changes: blood without oxygen (de-oxyhemoglobin)

    tHb: a critical measure of blood oxygen transport capacity

    HbDiff: difference of 02Hb and HHb