How does your fitness tracker know when you are asleep?

Have you ever thought about how does your fitness tracker know when you are asleep?

The second question is that the data that your wearables collect during your sleep, is it accurate and reliable?

Whether you have a Garmin, Realme, or any Fitbit, smartwatch, most fitness trackers work the same way.

The fitness tracker is not good! Wait wait. But not good for whom?

The answer is that there is no fitness band option for those whose sleep gets disrupted repeatedly or they have a sleep disorder problem.

Most fitness bands and smartwatches have a 3-axis accelerometer.

Fitness bands have axis-based motion sensing which is capable of tracking every movement.

Some smartwatches or fitness bands come with a gyroscope to measure or predict rotation.

Your wearable translates the movement of your wrist into sleep patterns. And this process is known as actigraphy.

One thing that should be clear to you that this actigraphy process is not very accurate. The most primary reason behind this is that actigraphy only tracks the movement.

Your breathing, your brain waves, eye movements all determine the distance between your deep sleep and light sleep.

If we talk about only actigraphy, after much research, normal sleep patterns of healthy adults are accurate.

Well, if I say one thing, it all comes within psychology.

Your smartwatch or fitness tracker can tell you the perfect 8-hour quality sleep. Now how accurate it depends on which brand of fitness tracker or smartwatch you are using and what technology is used.

Well, that is a good thing. Even before the invention of all this technology, we knew that if anything tracks our health, then by using it we will be constantly aware of our health.

And it is a part of our psychology that when anything tracks us, we remain more disciplined towards our goal. And this is what helps us to achieve our goal.

To achieve a big goal, you should concentrate on achieving small daily goals. This is the easiest way to focus your big goal into small pieces.

On the other hand, if you talk about it when your fitness band does not tell you 8 hours of quality sleep, then there is a more negative effect in your mind. Even if you have quality sleep, doubts will still arise.

Should You Trust Your Fitness Tracker?

Well, let me tell you one thing that I am not an asleep expert or a doctor. 

But some research and researchers say that through actigraphy you can believe whatever data you get from your quality sleep. Not 100% accurate, but still you can believe it.

But as we discussed above, relying on actigraphy for someone who has problems with sleep disorder is not advisable and correct.

In such a case, going to the doctor and getting the PSG test done is the most suitable option.

But, if I give you my opinion if you do not have problems with your fitness band or from a smartwatch, and you feel that the results showing you your wearable are almost right then you can continue to use it.

You are sleeping before you will know whether you are getting sleep properly or not. As we discussed, some things also depend on our mentality and physics.

Polysomnography or PSG Process

Most of the people who are sleep researchers use polysomnography or PSG.

And these processes are also called gold standards. Which is used for sleep measurements?

This means that sleep researchers rely on polysomnography or PSG.

What is included in the PSG processor test?

PSG process or test involves sleeping in the lab where your brain waves are also monitored through the EEG test.

The electrodes on your scalp measure your brain waves. However, it is more accurate.

FAQ on How does your fitness tracker know when you're asleep?

Que 1: How does my fitness tracker know I'm sleeping?

Ans 1: The process name is Actigraphy. Sleep studies were done by actigraph devices.

Your fitness band tracks your movement when you are sleeping. And it gives to warn on your wrist.

Then periods of your sleep and wake are translated by software.

Que 2: Are sleep trackers accurate?

Ans 2: If we talk about apple watch or Fitbit, they give main attention to your movement and heart rate. Based upon this they determine when you are asleep or awake. As per my according it does not precise enough to evaluate your quality sleep as per some doctors.

Que 3: Can Fitbit detect sleep apnea?

Ans 3: I noticed one thing in the new feature.  It is called the Sleep Score beta feature. And it detects your sleep hurdles or disturbance factors. It also indicates some issues like sleep apnea, asthma, etc.

Que 4: How much deep sleep is normal?

Ans 4: Average healthy adults get nearly 1 to 2 hours of deep and quality sleep per maximum of 8 hours of night sleep.

But to be honest it is up to your body acceptance and physics my friends.

Que 5: What is a good sleep quality score?

Ans 5: First of all, let me tell you that the sleep score is measured between 0 to 100.

If the score is 75 or more, then it is considered normal or good sleep quality.

If there is a score of 80 or more continuously, then it is considered in the best sleep quality.

Que 6: What color LED light should I sleep with?

Ans 6: As per clinical research Red light is the answer. Red light is a suitable option for the evening as well as night due to low color temperature compared to sunlight.

But honestly, I don't like a red light. As per my according it distracts. I am not opposing clinical research but this is my opinion that I don't want to go for a sleep with a red light.

Conclusion on How does your fitness tracker know when you're asleep?

How does your fitness tracker know when you're asleep? If we talk about the conclusion, today there are many accurate quality fitness bands or smartwatches.

If you feel that your health activity is being tracked correctly by wearing wearable and you are achieving your fitness goals, then you do not need to think much more.

But if there is an issue of sleep disorder then you do not need to wear or take the data to your mind.

Hope you like this article of mine.

Thank you for your valuable time.

Thank You.

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