Train.Red develops and manufactures wearable muscle oxygen sensors and systems that track your muscles in real time, using near-infrared spectroscopy (NIRS) to measure muscle oxygen saturation (SmO2% or TSI%) and hemoglobin concentration. Most training tools already cover speed, workload, and heart rate. Train.Red covers the part they miss: what's actually happening inside the muscle. Train.Red is an independent company, founded by a core team with a background at Artinis Medical Systems, the Dutch NIRS manufacturer behind the current golden standard in the field. That's where the founding team's NIRS expertise comes from; it packed that scientific grounding into 20 grams of wearable tech, no lab required. Measuring oxygen in the muscle is only the starting point, though. Train.Red's coaching layer turns that data into features any athlete can use, no science degree needed: when a muscle is fatiguing, how long it needs to recover, whether an interval was too hard, too easy, or right on target. Muscle oxygen is where Train.Red started, not where it ends. The company's broader focus is human performance as a whole, physical and cognitive, which puts Train.Red across a wider field than muscle monitoring alone: sports labs, physical performance, wellness, and health. The belief behind it stays the same regardless of which system is doing the measuring: everyone should be able to benefit from their own body's potential, and use that data to actually perform better.

FYER vs. FYER PRO vs. PLUS: what's the difference?

Train.Red's three muscle oxygen monitors, FYER 2.0, FYER PRO, and PLUS 2.0, are built on two different NIRS designs. FYER 2.0 and FYER PRO use Train.Red's own line sensor technology. PLUS 2.0 uses the gold-standard NIRS technology found in clinical and research-grade systems. A line sensor is a row of tiny light receivers rather than one fixed detector. It works something like a camera's shutter speed: if the muscle is reflecting a lot of light, the sensor shortens how long the receivers stay on; if the signal is weak, it lengthens that exposure window and adjusts the transmitter's output to match. That constant self-calibration is what keeps the reading accurate as muscle tissue, skin tone, and blood flow vary from person to person and session to session. PLUS 2.0's gold-standard sensor takes a different route to accuracy: it's calibrated in-house against phantoms, physical models built to simulate human tissue and known oxygen levels, the same calibration method used in clinical NIRS research. FYER 2.0 weighs 20 grams, is IPX7 waterproof, and samples SmO2 at 10Hz. That's enough resolution to track fatigue trends clearly through a session. Battery life runs about 20 hours per charge. It reports SmO2% directly, without the full hemoglobin breakdown. FYER PRO shares the same lightweight, waterproof body as the FYER 2.0. It samples up to 100Hz, though, and adds O2Hb, HHb, tHb, and HbDiff to the readout alongside SmO2%. PLUS 2.0 uses six measurement channels instead of one. That lets it read across a wider tissue depth, or cover several muscle sites at once, which suits fuller metabolic profiling. It's 26 grams, IPX4 sweat-resistant, and runs about 12 hours per charge. All three feed into the same free app and Muscle States coaching layer over BLE/ANT+. Riders, runners, HYROX and CrossFit athletes, and strength coaches all read the same underlying signal through the same interface, whichever sensor they're wearing. Every sensor exposes its full raw data too. But raw data was never meant to be the finish line: the app exists to turn 'SmO2 dropped to 42%' into 'back off pace now, before you feel it.'

How does a muscle oxygen sensor actually measure SmO2?

It shines near-infrared light through the skin into the muscle and reads how much of that light bounces back. Oxygenated and deoxygenated hemoglobin absorb near-infrared light at slightly different wavelengths. By measuring the reflected light, the sensor works out the ratio between the two. That ratio is SmO2, expressed as a percentage. The measurement happens continuously and non-invasively, right at the muscle. That means it captures what's happening in that specific tissue as it happens, not an estimate inferred from somewhere else in the body. Train.Red applies this principle, refined over decades of NIRS research, in a package built for training rather than a lab bench.

SmO2 vs. heart rate: why does muscle oxygen matter more for intervals?

Heart rate tells you how hard your heart is working. It doesn't tell you how your muscle is actually doing. It's a whole-body number, it lags behind what's really happening, and it shifts with caffeine, heat, sleep, or stress, none of which has much to do with your quads at that specific moment. SmO2 skips all of that. It shows, muscle by muscle, whether oxygen supply is keeping up with oxygen demand right now. An athlete can catch local fatigue building before it shows up in pace or power output, identify their actual physiological limiter instead of a stand-in for it, and set work and rest intervals around what the muscle needs.

Train.Red PLUS Muscle Oxygen Sensor + app

Train.Red PLUS 2.0 肌肉氧传感器 + 应用程序

Name: Train.Red PLUS 2.0 肌肉氧传感器 + 应用程序
Brand: Train.Red
SKU: 2001-00001-00-1
Price: 2099.0 EUR
Availability: InStock

价格包含 Train.Red 应用程序的使用权

包裹:

核心（1个传感器）

核心（1个传感器）入门套装（含 2 个传感器）专业套装（4个传感器）独奏

多属性

€2.099,00

现货

New to muscle oxygen, guided start

1x Full Set Sensor (Charging Cable, Strap Pack (S-M-L), 2 Plug and Travel Pouch)
Free App
Muscle Oxygen Course

六通道。100 Hz。极致的生理细节。
专为体能专家、教练及运动实验室打造，Train.Red PLUS 2.0超越了单通道追踪的限制，提供多深度、高分辨率的肌肉氧动力学监测。
得益于六个 NIRS 测量通道和 100 Hz 的采样率，PLUS 2.0 可捕捉跨组织深度和部位的完整生理数据。通过 Train.Red 应用程序，它能将实验室级别的原始指标无缝转化为结构化的测试、运动员管理及自动报告。此外，您还可以将 10 个以上的传感器连接至同一设备，实现全面的团队与实验室监测。

关键指标：
• SmO₂% 与完整血红蛋白谱：实时追踪 SmO₂%、O₂Hb、HHb、tHb 及 HbDiff
• 多部位与多深度分析：六个测量通道，提供深层组织及多点生理洞察
• 高级解读：肌肉状态、MSS、恢复阶段、燃料/使用情况及趋势
• 实时血红蛋白数据

关键规格：
• 采样率：超高 100 Hz 分辨率
• 测量通道：6 个独立 NIRS 通道
• 测量深度：多深度组织定位
• 追踪参数：SmO₂%、O₂Hb、HHb、tHb 及 HbDiff
• 多传感器连接：一台设备可连接 10 个以上传感器
• 软件集成：Train.Red 应用程序及教练平台
• 报告功能：自动生成实验室与测试报告
• 目标环境：实验室、精英教练指导及体能研究

数量:

Train.Red PLUS 2.0 肌肉氧传感器 + 应用程序

€2.099,00

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