What Does Lumen Measure? Here’s What the Device Is Really Tracking

Trying to figure out what does Lumen measure and how it works? Here’s everything you need to know.

There’s a lot of buzz around Lumen right now, and for good reason. See, it’s not your typical fitness gadget. Instead of counting steps or logging workouts, it tells you what kind of fuel your body’s running on.

Sounds a bit technical we know, but it’s actually pretty straightforward once you understand how it works.

The big question most people have is what does Lumen measure, and the answer’s a lot more interesting than you might think.

Before we get into it though, and answer that burning question of ‘what does Lumen measure’, you need to know that the Lumen device and 12 months of membership is currently £299 in the New Year Sale, and you can save an extra 10% off that with our Lumen discount code GYMDISCOUNT.

What Exactly Is Lumen?

Lumen is a small handheld device that gives you a peek into your metabolism. It tells you whether your body is using fat or carbs for energy, which can be super helpful if you’re trying to manage your weight, tweak your diet, or just understand what’s going on with your body.

It was originally designed by a team of scientists and engineers who wanted to make metabolic testing more accessible. Normally, you’d need to go to a lab, get hooked up to all kinds of equipment, and spend a fortune just to get the kind of info Lumen now gives you in under a minute.

It’s honestly wild how much tech they’ve packed into something so small.

What Does Lumen Measure?

So this is the big question, isn’t it. What does Lumen measure? Well it all comes down to the CO2 in your breath.

When you breathe into the device, Lumen’s sensors check how much carbon dioxide is in your exhale. And that number can tell you a lot about what your body’s doing.

Basically, when you’re burning carbs for energy, your body produces more CO2. When you’re burning fat, it produces less. So by looking at that CO2 level, Lumen can figure out what fuel source you’re using in real time. Pretty clever, right?

The tech inside includes a CO2 sensor, a flow meter to track your breathing, plus sensors that check things like temperature and air pressure. All of that works together to give you a super accurate picture of your metabolism.

The Lumen App

Now that we’ve answered that question of what does Lumen measure, it’s time to talk about the app. Because this is where everything gets brought to life, turning your breath data into personalised, easy-to-follow advice.

After you breathe into the device, your results pop up in the app and tell you what your body’s currently using for energy.

It’s super easy to understand, with a score that shows if you’re mostly burning fat, mostly burning carbs, or somewhere in between.

But it doesn’t stop there. Based on your result, Lumen gives you personalised tips and recommendations. That might include:

What your ideal macros should look like for the day
Whether you should be going higher or lower on carbs
Fasting suggestions based on your current state
Overall nutrition guidance to help you hit your goals

It basically adjusts your plan every day depending on your body’s needs, which is way more helpful than a one-size-fits-all meal plan that forgets you even exist.

Is Lumen Actually Accurate?

We’ve covered the question of what does Lumen measure, and broken down the beauty of the app, but the next thing most people want to know is whether or not Lumen’s actually accurate.

And the answer is a resounding yes.

See, the tech behind Lumen has been tested against the gold standard of metabolic testing, which is called indirect calorimetry. That’s the big fancy test you’d usually get done in a lab, wearing a mask while they analyse your breath.

So yes, Lumen absolutely holds up. The results are backed by science and give you legit insight into how your metabolism is working on any given day. And when you have that information you can make the right choices to support your health, weight, and fitness goals.

Final Thoughts

So, what does Lumen measure? It’s all about the CO2 in your breath. That one simple measurement gives you a window into your metabolism and shows whether you’re burning fat or carbs for energy. From there, the app takes over with personalised tips, tailored macros, and flexible plans that actually make sense for your body.

With the current sale price and our 10% off Lumen discount code GYMDISCOUNT, it’s a great time to try it out and finally get some answers about what’s going on inside your body.

So head to the Lumen website today to check it out.