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 FYER Muscle Oxygen Sensor + app

Train.Red FYER 2.0 肌肉氧传感器 + 应用程序

Name: Train.Red FYER 2.0 肌肉氧传感器 + 应用程序
Brand: Train.Red
Price: 799.0 EUR
Availability: InStock

价格包含 Train.Red 应用程序的使用权

包裹:

核心套装（1个传感器）

核心套装（1个传感器）入门套装（2个传感器）专业套装（4个传感器）独奏

多属性

€799,00

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

发货通知：10 月底前发货

直观了解肌肉状态。
运动员在专注于装备和训练计划的同时，往往忽视了表现的真正源头：您的肌肉。心率反映了您的整体努力程度，而 Train.Red FYER 2.0 则能揭示肌肉内部的具体状况。
FYER 2.0 让您能够实时优化训练强度、疲劳度和恢复情况。通过 Train.Red 应用程序，它能将复杂的数据转化为可操作的洞察。您还可以将 10 个以上的传感器连接到同一设备，实现无缝的团队和小组监测。

关键指标：

SmO2：实时肌肉氧饱和度
肌肉状态与 MSS：肌肉反应和压力定量分析
恢复与耗氧量：追踪氧气需求、利用率和恢复率

关键规格：

重量：20 克
电池续航：长达 20 小时
耐用性：IPX7 级防水，支持机载存储

数量:

Train.Red FYER 2.0 肌肉氧传感器 + 应用程序

€799,00

关于FYER你需要了解的一切

Train.Red 通过传感器实时追踪您的肌肉氧含量。我们的智能应用程序可将这些肌肉数据转化为关键指标，从而指导运动员提升运动表现。

FYER 用户手册

规格

尺寸： 1.2 x 4.4 x 5.9 厘米 (0.5 x 1.7 x 2.3 英寸)
重量： 20克
测量深度： 深入肌肉达 20 毫米
光源与探测器距离： 最远 35 毫米
防水： 是（加装插头后可游泳）
电池续航： 活跃使用下最长 20 小时
速度： 10Hz
连接性： BLE 和 ANT+
惯性测量单元 (IMU)： 陀螺仪和加速度计
板载存储： 数据随时可用
多设备连接： 将 10 个以上的 FYER 传感器连接至 1 台智能设备，用于团队或小组监测
材质： 高品质生物相容性 ABS 和 TPE

Train.Red 应用程序

Train.Red FYER 搭配我们的 Train.Red 应用程序使用效果最佳，可提供深入的肌肉氧含量分析，助您更科学地进行训练。
📖 请点击此处查看应用程序手册。

兼容性

✔️ VO2Master 管理器
✔️ Splendo 健康与健身
✔️ ANT+ 配置文件（Garmin、Wahoo 等）
✔️ Garmin 数据字段集成
✔️ Fulgaz 等

Train.Red 是什么？

Train.Red 开发并制造可穿戴式肌肉氧传感器和系统，利用近红外光谱技术 (NIRS) 实时监测您的肌肉，以测量肌肉血氧饱和度 (SmO2% 或 TSI%) 及血红蛋白浓度。大多数训练工具涵盖了速度、工作负荷和心率，而 Train.Red 则补充了它们所遗漏的部分：肌肉内部的真实状况。

Train.Red 是一家独立公司，由一支核心团队创立，其背景源于荷兰 NIRS 制造商 Artinis Medical Systems——该领域目前公认的黄金标准。创始团队的 NIRS 专业知识正是由此而来；他们将这些科学基础浓缩进 20 克的穿戴式技术设备中，无需实验室即可使用。然而，测量肌肉中的氧含量仅仅是个开始。Train.Red 的教练指导层将这些数据转化为任何运动员都能使用的功能，无需科学学位即可理解：肌肉何时产生疲劳、需要多久才能恢复、间歇训练是太难、太容易还是恰到好处。

肌肉氧监测是 Train.Red 的起点，而非终点。公司的更广泛重点是包括身体和认知在内的人类整体表现，这使 Train.Red 的应用领域超出了单纯的肌肉监测：涵盖了运动实验室、身体机能、健康与保健。无论使用哪种系统进行测量，其背后的信念始终如一：每个人都应该能够从自身身体潜能中获益，并利用这些数据切实提升表现。

FYER 与 FYER PRO 与 PLUS 2.0：它们有何区别？

Train.Red 的三款肌肉氧监测仪——FYER 2.0、FYER PRO 和 PLUS 2.0，均基于两种不同的 NIRS（近红外光谱）设计：

FYER 2.0 与 FYER PRO（线阵传感器技术）：这些型号采用了 Train.Red 自有的线阵传感器技术。线阵传感器是由一排微型光接收器组成，而非单一的固定探测器。其工作原理类似于相机的快门速度：如果肌肉反射的光线较强，传感器会缩短接收器的开启时间；如果信号较弱，则会延长曝光窗口，并调整发射器的输出以进行匹配。这种持续的自我校准功能，确保了在不同肌肉组织、肤色和血流量下读数的准确性。

FYER 2.0：重量为 20 克，具备 IPX7 级防水性能，SmO2 采样频率为 10Hz。单次充电续航约为 20 小时。它直接报告 SmO2%，不提供完整的血红蛋白分解数据。

FYER PRO：与 FYER 2.0 共享相同的轻量化防水机身，但采样频率高达 100Hz。除 SmO2% 外，它还增加了 O2Hb、HHb、tHb 和 HbDiff 的读数。

PLUS 2.0（黄金标准研究级传感器）：采用了临床和研究级系统中常见的黄金标准 NIRS 技术，并在内部通过物理组织模型（仿体）进行了校准。它配备了六个测量通道而非一个，能够读取更深层的组织数据，或同时覆盖多个肌肉部位以进行全面的代谢分析。其重量为 26 克，具备 IPX4 级防汗性能，单次充电续航约为 12 小时。

这三款设备均可通过 BLE/ANT+ 连接到同一个免费应用程序以及 Muscle States 教练层。每个传感器都能提供完整的原始数据，而该应用程序的存在，旨在将“SmO2 降至 42%”转化为“现在减速，在你感到疲劳之前”。

SmO2 与心率：为何肌肉氧含量在间歇训练中更为重要？

心率反映了心脏的工作强度，但无法反映肌肉的实际状态。它是一个全身性的指标，不仅滞后于当前的真实情况，还会受到咖啡因、温度、睡眠或压力的影响，而这些因素与你当时腿部肌肉的状态并无太大关联。

SmO2 则完全避开了这些干扰。它能逐块肌肉地显示当前的氧气供应是否满足氧气需求。运动员可以在疲劳感体现在配速或功率输出之前就察觉到局部疲劳的积累，从而识别出真正的生理限制因素，而非仅仅依靠替代指标，并根据肌肉的实际需求来设定训练和休息间隔。

肌肉氧传感器是如何通过声学方式测量 SmO2 的？

它将近红外光穿过皮肤照射到肌肉中，并读取反射回来的光量。氧合血红蛋白和去氧血红蛋白在不同波长下对近红外光的吸收程度略有不同。传感器通过测量反射光，计算出两者之间的比例。该比例即为 SmO2，以百分比表示。

这种测量是连续且无创的，直接在肌肉部位进行。这意味着它能实时捕捉特定组织中正在发生的变化，而不是根据身体其他部位推断出的估计值。Train.Red 应用了这一经过数十年 NIRS 研究打磨的原理，并将其集成到专为训练而非实验室台面设计的设备中。

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