内容来源：https://www.engadget.com/2197736/do-fitness-trackers-work-with-tattoos/

内容总结：

健身追踪器遇上纹身：科技与皮肤的“兼容性”难题

花数百美元购买智能手表或健身手环，却发现它无法正常读取身体数据——这听起来令人沮丧，却是有手腕纹身人群近年来频繁遭遇的困扰。无论是设备支持论坛还是Reddit社区，大量用户反馈显示：纹身皮肤与可穿戴设备的传感器常常“水火不容”。

问题根源：光线传感器“失灵”

核心症结在于设备依赖光电容积描记术测量心率——也就是设备背面发出的绿光。纹身墨水、图案和饱和度会干扰光线穿透皮肤，导致心率读数不准甚至完全缺失。此外，用于检测佩戴状态的手腕识别功能同样依赖光线（配合加速度计和电传感器），如果传感器恰好覆盖纹身，设备可能根本无法识别被佩戴，用户每次操作都需反复解锁。

官方回应：建议避开纹身区域

设备制造商已承认这一缺陷。佳明在支持页面明确表示：“纹身会阻挡心率传感器光线，造成读数缺失或错误。为获最佳效果，请尽可能将手表佩戴在无纹身皮肤上。”苹果公司自初代Apple Watch发布起也发布了类似提示。

民间“自救”：多种权宜之计

纹身用户摸索出不少临时解决方案：将设备戴在内侧无纹身的手腕部位，或换到另一只无纹身的手腕。也有用户用环氧树脂瓶盖贴纸或透明胶带覆盖传感器，据说能意外改善读数。追求心率准确性者还可使用胸带式心率带——前提是胸前没有纹身。但无论哪种方式，日常佩戴都谈不上舒适或便捷。

技术瓶颈：研究尚需深入

理论上，定位问题才是解决的第一步。但2025年一项研究显示，纹身对传感器的影响因人而异：研究为参与者同时佩戴纹身处和光滑皮肤处的设备，并以胸带式心率监测器作为基准，发现静止状态下纹身对读数干扰最明显，随着运动强度增加差异反而减小；部分案例中纹身甚至未造成任何影响。影响变量包括墨水颜色、饱和度和深度，但目前对问题的精细化研究依然不足，根本解决方案遥遥无期。

未来展望：传感器亟待升级

要彻底解决此问题，必须改进依赖光线技术的传感器，使其适应纹身墨水等皮肤变异。同样，光线传感器对深色皮肤的可靠性也较差，凸显了这类技术研发中忽视多样性的问题。值得关注的是，谷歌Pixel Watch 4在纹身皮肤上的表现据称显著优于前代；三星虽曾传出通过更新改善此问题，但Galaxy Watch用户的大量投诉表明效果存疑。

中文翻译：

如果你有纹身，健身追踪器还能正常工作吗？
简单回答是：有时可以，但情况比较复杂。
花了几百美元买来的可穿戴设备，你最不希望发生的事情就是发现它和你的身体不兼容。然而，自从智能手表和健身追踪器问世以来，手腕上有纹身的人就经常遇到这个问题。多年来，设备支持页面和Reddit上有无数帖子记录了这一现象：纹身皮肤与可穿戴设备使用的传感器往往难以很好地配合。

人们遇到的主要问题之一与心率感应有关。可穿戴设备使用一种名为光电容积脉搏波描记法（PPG）的光学技术来测量心率——也就是当你把设备翻过来时看到的绿色灯光。但纹身会阻挡这种光，从而干扰读数。另一个问题是手腕检测功能，该功能同样利用光线（以及加速度计和电子传感器）来判断追踪器是否戴在用户手腕上。如果将健身追踪器戴在覆盖有纹身的手腕上，设备可能完全无法识别佩戴状态，导致用户每次想要与设备互动时都必须反复解锁。

有人可能会觉得，一项先进到能响应手势控制、提供个性化睡眠指导的技术，竟然会被一点颜料难住，这似乎有点荒谬。但纹身问题绝非消费者凭空抱怨。设备制造商已经承认了这一问题，并建议买家避免将追踪器戴在纹身部位。

“纹身（墨水、图案、饱和度）会阻挡心率传感器的光线，导致读数不准确或缺失，”佳明在其支持页面上指出。“为获得最佳性能，请尽可能将手表佩戴在无纹身的皮肤上。”苹果公司早在第一代Apple Watch发布时就发布了类似的提醒。

有解决办法吗？
有纹身的人想出了各种变通方法来充分利用他们的智能手表和健身追踪器，但都不是很理想。最简单的方法是什么？如果你的手腕内侧没有纹身（或者至少有大面积干净皮肤），你可以把设备戴在那里，而不是手腕上方。同样，如果你的另一只手腕没有纹身，就把设备戴在那只手上。但如果你多年来已经习惯在某些手腕上戴手表，突然改变会感觉很别扭。

作为一种快速解决方案，有些人强烈推荐使用环氧树脂瓶盖贴片或叠放透明胶带，将这些材料覆盖在传感器上，结果莫名其妙地解决了许多佩戴者的问题。一些设计原理相同的可重复使用配件也取得了一定成功。如果你只追求准确的心率追踪，且胸部没有纹身，还可以选择使用胸带。不过，在大多数日常场景下，这也不是最舒适或最便捷的使用方式。

归根结底，除非这些手表和健身追踪器所依赖的传感器得到改进，能够适应纹身墨水等皮肤差异，否则这个问题将持续存在。同样，光学传感器对深色皮肤人群的可靠性也较低，这凸显了此类技术研发中需要更多样化的样本。

从个例来看，谷歌的Pixel Watch 4在处理纹身皮肤方面似乎比前代产品好得多。几年前曾有传言称三星将推出更新来改善这方面的问题，但Galaxy Watch用户的抱怨却表明情况并非如此。

还需要更多研究
理论上，识别问题是解决问题的第一步，但遗憾的是，实际情况是纹身对传感器读数的干扰程度并不一致。2025年发表的一项研究试图量化设备在纹身皮肤与无纹身皮肤上读数的差异。虽然研究确实发现前者存在不准确的情况，但结果并不统一。

研究人员使用了Polar Verity Sense和臂带，为参与者佩戴两台设备：一台在纹身区域，另一台在同一只手臂的无纹身区域。参与者还佩戴了Polar H10胸带式心率监测器以建立基准数据——因为这种类型的可穿戴设备被认为更准确。在一天中，研究人员在参与者休息、以自定速度步行和慢跑时对他们进行了监测。

结果显示，纹身确实对心率读数有影响，但这种影响取决于佩戴者的活动水平，“在休息时影响最大，随着运动强度增加，变化逐渐减小。”而在某些情况下，研究人员指出，“手臂纹身完全不影响心率测量的有效性。”需要考虑的变量很多——比如墨水颜色、饱和度和深度——而就目前而言，关于这个问题的深入研究还不够，尚不足以找到解决方案。

英文来源：

Do fitness trackers still work if you have tattoos?
The short answer is: sometimes, but it’s complicated.
The last thing you want to happen after dropping hundreds of dollars on a wearable is to discover that it doesn't work with your body. But, that's a fairly common problem people with wrist tattoos have been running into since the advent of smartwatches and fitness trackers. As countless posts on device support pages and Reddit have chronicled over the years, tattooed skin and the sensors used by wearables often don't mix well.
One of the main issues people experience is with heart rate sensing. Wearables use a light-based technique called photoplethysmography (PPG) to measure heart rate. That's the green light you see when you flip your device over. But, tattoos can get in the way of that light, messing with the readings. The other problem is wrist detection, which also uses lights to determine if the tracker is on a person's wrist (along with an accelerometer and electrical sensors). Slap a fitness tracker on a wrist that's covered by a tattoo, and the device may not register that it's being worn at all, consequently requiring the wearer to repeatedly unlock the device whenever they want to interact with it.
It might seem a bit silly that technology advanced enough to respond to gesture controls and provide personalized sleep coaching would be stumped by a bit of pigment, but the tattoo issue isn't just a baseless gripe that consumers have latched onto. Device makers have acknowledged it and advised buyers to avoid putting their trackers on top of tattoos.
"Tattoos (ink, pattern, saturation) can block the heart rate sensor's light, causing inaccurate or missing readings," Garmin notes on a support page. "For best performance, wear the watch on skin that is free of tattoos if possible." Apple has issued similar notices going back to the release of the first Apple Watch.
Is there a solution?
People with tattoos have devised sorts of workarounds to get the most out of their smart watches and fitness trackers, though none are exactly ideal. The simplest? If the inside of your wrist isn't tattooed (or at least has larger areas of clear skin), you can position the device there instead of on top of the wrist. Similarly, if your other wrist is tattoo-free, wear the device on that one. But if you've grown used to wearing a watch on a certain wrist for years, it's going to feel pretty weird to change it up.
As a quick fix, some people swear by epoxy bottle cap stickers or layering pieces of clear tape, either of which are placed over the sensors and inexplicably correct the problem for a lot of wearers. Reusable accessories designed to work the same way have seen some success too. There's also the option of using a chest strap if accurate heart rate tracking is all you're after — and if you don't have chest tattoos. Again, though, this isn't the most comfortable or convenient way to use a wearable in most situations day-to-day.
Ultimately, it'll continue to be an issue until the sensors these watches and fitness trackers rely on are improved to account for skin variations like tattoo ink. Likewise, light-based sensors have been found to be less reliable for people with dark skin, highlighting a need for more diversity in the research and development of this type of technology.
Anecdotally, it seems like Google's Pixel Watch 4 might be much better at handling tattooed skin than its predecessors. There were rumors of Samsung introducing an update a few years back to improve things in this area too, but the complaints of tattooed Galaxy Watch users would suggest otherwise.
More research is needed
Identifying the problem is theoretically the first step to solving it, but unhelpfully, the reality is that how much tattoos interfere with sensor readings isn't consistent from case to case. A study published in 2025 attempted to quantify the difference in readings taken from devices worn over tattooed skin versus non-tattooed skin, and while it did find the former suffered inaccuracies, the results were mixed.
The researchers used the Polar Verity Sense and armband, outfitting participants with one device over a tattoo plus one on the same arm in an area without a tattoo. Participants also wore a Polar H10 chest strap heart rate monitor to establish a baseline, as this style of wearable is considered to be more accurate. Over the course of a day, they were monitored when at rest, walking at their own pace and jogging.
This revealed that the presence of the tattoos did have an impact on heart rate readings, but it was dependent on the wearer's activity level, "with the greatest effect observed at rest and variation decreasing as exercise intensity increases." And in some cases, the researchers note, "the presence of an arm tattoo did not affect the heart rate validity measurement at all." There are a number of variables that must be taken into account — like ink color, saturation and depth — and as it stands today, there just hasn't yet been enough research down to the nitty-gritty of the problem to bring about a solution.