The Wearable Data Worth Paying Attention To (and What to Skip)

I’ve spent a lot of years in the health and fitness world, so I’m no stranger to tracking numbers. And I actually love having access to information that can help us better understand what’s happening in the body. But I also think there’s a point where more data isn’t necessarily more helpful.

Whether it’s sleep, steps, heart rate, HRV, or a recovery score, I always come back to the same question: Is this information helping you understand and support your body, or is it becoming another thing to stress about?

That’s especially important when we’re already navigating things like fatigue, hormone changes, chronic stress, or simply a very full life.

For a lot of us, the day now starts the same way: eyes open, phone in hand, and a quick look at last night’s sleep score before we’ve even sat up. Maybe there’s a readiness score. Maybe your HRV is down a few points from yesterday, and suddenly a morning that felt perfectly fine starts to feel...not so fine.

Wearable technology can give us some genuinely useful information. The challenge is figuring out which numbers are worth paying attention to and which ones don’t deserve quite so much power over our day.

So let’s break it down.

Start With These Three

One of the measurements you may see on your wearable is heart rate variability, or HRV.

Unlike a metronome, your heart doesn’t beat at perfectly even intervals. HRV measures the small variations in time between heartbeats and can offer some insight into how your autonomic nervous system is responding to things like stress, exercise, sleep, and recovery.

But HRV is highly individual.

Rather than comparing your number to someone else’s, it’s much more useful to become familiar with your own baseline and how it changes over time.

Beyond HRV, there are three areas I think are particularly useful to watch.

Sleep Consistency

It’s easy to become fixated on getting the “perfect” number of hours each night, but consistency matters too.

Research has found a strong relationship between regular sleep and wake times and long-term health. That doesn’t mean you need to go to bed at exactly 9:47 every night. It means our bodies generally appreciate rhythm.

Looking at your sleep patterns over several weeks can be much more informative than worrying about one bad night.

Daily Movement

Then there are steps.

You’ve probably heard 10,000 steps a day more times than you can count, but that number isn’t a magical threshold.

Research suggests that health benefits increase as daily steps increase, with benefits eventually beginning to level off. And depending on your age, health, activity level, and current capacity, the right amount of movement for you may look very different from someone else’s.

Instead of chasing a perfect number, I like to think about steps as a simple way to notice:

Am I moving regularly throughout my day?

Sometimes adding a short walk after a meal or taking a few extra movement breaks can make a meaningful difference without turning movement into another item you have to “perfect.”

Cardiovascular Fitness

Many wearables also provide an estimate of VO₂ max, sometimes labeled as cardiovascular fitness or cardio fitness.

VO₂ max is essentially an estimate of how efficiently your body can use oxygen during exercise. Higher levels of cardiovascular fitness have consistently been associated with better long-term health outcomes.

Your wearable’s number is still an estimate, not a clinical measurement, but watching the trend over time can give you useful information about your cardiovascular fitness.

Regular walking, lower-intensity aerobic activity, strength training, and appropriately challenging exercise can all be part of supporting cardiovascular health.

Again, we’re looking for the trend, not a perfect score.

The Weekly Review

This is where wearable data becomes much more useful.

Don’t let one bad reading determine how you think your body is doing.

One night of poor sleep, one low HRV reading, or one day with fewer steps doesn’t tell us very much by itself.

What we want to look for are patterns.

Instead of checking every number every morning and reacting to it, consider looking at your data once a week.

Ask yourself:

• Are my sleep and wake times fairly consistent?
• Am I moving more or less than I was a few weeks ago?
• Is my HRV staying around my usual baseline, or has it been trending downward?
• Do I notice connections between my numbers and periods of increased stress, poor sleep, illness, travel, or changes in my routine?
• Most importantly: Do the numbers match how I actually feel?

Then choose one or two things you might want to work on.

More isn’t always better. Small, sustainable changes that your body can actually adapt to are often far more useful than trying to optimize everything at once.

And the habits that influence these numbers don’t have to be complicated.

A fairly consistent wake time. Getting outside for some morning light. Taking a short walk after meals. Slowing your breathing for a few minutes. Giving your body enough recovery between demanding workouts. Paying attention to how alcohol, late meals, stress, or disrupted sleep affect you.

None of those things are particularly glamorous.

But foundational habits rarely are.

When to Close the App

And sometimes the healthiest thing you can do with your wearable is stop looking at it.

There’s actually a term called orthosomnia, which was coined after clinicians began seeing people become so preoccupied with improving their sleep-tracker data that the pursuit of perfect sleep was actually creating more anxiety around sleep.

That’s exactly the opposite of what we want.

Wearables can be helpful tools, but they’re still consumer devices. Sleep stages, recovery scores, calorie estimates, and other measurements aren’t always perfectly accurate.

And your body exists in a context that your watch doesn’t fully understand.

Travel can affect your numbers.

So can a hard workout.

So can getting sick.

So can emotional stress.

And for women, changes throughout the menstrual cycle and perimenopause can influence things like sleep, resting heart rate, temperature, and recovery patterns.

So if you wake up feeling rested and energized but your watch announces that you’re poorly recovered, you don’t have to suddenly decide that you feel terrible.

Your body gets a vote too.

The Bigger Picture

This is where a foundational nutrition approach becomes especially important.

I don’t look at any single piece of health information in isolation.

Wearable data is one piece of a much bigger picture.

The numbers become more meaningful when we look at them alongside how you’re actually feeling, how you’re sleeping, what you’re eating, your digestion, your energy, your stress load, your hormone patterns, your movement, and what else may be happening in your life.

Sometimes the data helps us notice a pattern we hadn’t recognized before.

Sometimes it gives us a question worth exploring.

And sometimes it simply confirms something your body has already been telling you.

That’s how I think wearable technology is best used: not as a verdict, but as another tool for becoming more aware of your own patterns.

Watch the trends.

Use the information to ask better questions.

Make changes that actually fit your life.

And please don’t lose sleep over one rough sleep score.

The number is there to inform you. It doesn’t get to run your day.

If you use a wearable, I’d love to know what you think. Which number do you find yourself paying the most attention to? Hit reply and tell me. I always love hearing what you’re noticing in your own health.

In Light,
Angela

Research references available upon request.

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