Every athlete should be able to fully benefit from their own muscles' potential.

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How-to train with Muscle Oxygen

About our technology (NIRS)

Unlock next-level performance with the NEW Train.Red FYER 2.0, the most advanced wearable muscle oxygen sensor on the market. While athletes invest in equipment, training plans, and supplements, the true driver of performance is often overlooked: your muscles. With real-time muscle oxygen (SmO₂%) tracking, FYER helps you optimize training, recovery, and performance like never before. Plus, you can connect 10+ FYER sensors to a single smart device—perfect for team monitoring and group training. What’s in the box? ✔️ Train.Red FYER sensor✔️ Charging cable✔️ Patch Pack (20 adhesive patches)✔️ Strap Pack (S-M-L sizes)✔️ Waterproof USB plug✔️ Durable travel pouch

Train.Red FYER 2.0 Muscle Oxygen Sensor + app

Take your monitoring to the next level with the Train.Red PLUS, the world's most advanced wearable muscle oxygen sensor. Engineered for elite athletes and performance-driven teams, the PLUS provides the fastest muscle oxygen measurements (100Hz) and the deepest insights into your body's oxygen utilization. While you may invest time and energy in equipment, training, and supplements, the key to performance is understanding and optimizing the one thing that drives it: your muscles. The Train.Red PLUS sensor provides muscle oxygen data, as well as additional metrics for deeper performance insights: Muscle oxygen (SmO₂%) Oxy-Hemoglobin (HbO2%) Deoxygenated Hemoglobin (DeOxy) Total Hemoglobin (HbDiff) What’s in the box? ✔️ Train.Red PLUS sensor✔️ Charging cable✔️ Patch Pack (20 adhesive patches)✔️ Strap Pack (S-M-L sizes)✔️ Durable travel pouch Technical Specs Size: 1.2 x 4.4 x 5.9 cm (0.5 x 1.7 x 2.3 in) Weight: 26g Measurement depth: Up to 25mm into the muscle Channels: 6 measurement depths (10mm, 15mm, 20mm, 30mm, 35mm, 40mm) Light source & detector distance: Up to 40mm Sweatproof: Yes Battery life: Up to 20 hours of active use Speed: 100Hz (fastest in its class) Connectivity: BLE & ANT+ IMU: gyroscope and accelerometer Onboard storage: Your data is always available Multi-device connection: Connect 10+ PLUS sensors to one smart device for team or group monitoring Materials: High-quality biocompatible ABS & TPE Train.Red App – Your Data, Your Insights The Train.Red PLUS works seamlessly with our Train.Red app, offering in-depth muscle oxygen insights that help you train smarter and more efficiently. Compatibility ✔️ VO2Master Manager✔️ Splendo Health & Fit✔️ ANT+ profiles (Garmin, Wahoo, etc.)✔️ Garmin Data Field Integration✔️ Fulgaz and many more...

Train.Red PLUS Muscle Oxygen Sensor + app

Set of 4 Train.Red FYER 2.0 Sensors. 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. Our FYER muscle oxygen sensor comes with: the Train.Red FYER, a charging cable, one Patch Pack (20 patches), and one Strap Pack (S-M-L) all in a durable travel-pouch.

SET OF 4: Train.Red FYER 2.0 Sensor + app

The PLUS 2.0 is the most advance 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. Our PLUS muscle oxygen sensor comes with: the Train.Red PLUS, a charging cable, one Patch Pack (20 patches), and one Strap Pack (S-M-L) all in a durable travel-pouch.

SET OF 4: Train.Red PLUS 2.0 Sensor + app

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