Should I track my sleep, and what can a WHOOP or Oura score actually tell me?

By Amanda Monger, who fixed her own broken sleep after thirteen years on tour and tracks every night. Published September 30, 2026. Not medical advice.

Track the boring numbers, ignore the dramatic ones. Wearables are reliable on when you fell asleep, when you woke, and roughly how long you slept. They are only 50 to 86 percent accurate on stages, and the score is a proprietary blend. I wear a WHOOP every night, and what it taught me is the thing the research says matters most: consistency. My wake time holding, hitting my sleep need and no alcohol move my numbers more than anything I can buy. If checking the score has started running your mood, that is orthosomnia, and the fix is a break. If you are on the fence, you do not need one to fix your sleep; a three-line morning note does the same job.

What trackers measure well

Bedtime, wake time and total sleep, within a few minutes of a lab study.
Resting heart rate and heart rate variability overnight, which respond fast to alcohol, illness, late hard training and stress. This is where a tracker earns its place: it shows you what a drink or a 9pm workout cost you.
Consistency, which the biggest dataset on record says predicts health better than hours.

What they guess at

Sleep stages. Deep, REM and light are inferred from movement and heart signals; agreement with a lab is fair to moderate across every brand tested. A single night's deep-sleep number is noise; the monthly trend is signal.
The score. Every company blends its metrics differently. Firmware updates have dropped users' scores 10 to 20 points overnight with no change in anyone's sleep.

How I use mine

I read the week, not the morning. Nights I hit my sleep need, my recovery runs about 15 points higher. Sauna days run about 7 higher. Alcohol turns any night red, which is one reason I stopped. I decide the day's training from how I feel plus the trend: two rough nights in a row is a rest day, one red morning when I feel fine is a shrug. The tracker is information, never a verdict.

The one I wear is WHOOP. If you want to try it, this is my link: join.whoop.com/amandamonger. Full disclosure, it is an affiliate link. It costs you nothing extra and I would wear it either way. What sold me was the strain side: it is the only thing that ever convinced me to go light after a bad night instead of bulldozing through.

When a tracker hurts

Orthosomnia, named by sleep clinicians in 2017, is anxiety caused by the data. Bad score, worry, worse sleep, worse score. Peer-reviewed estimates put it at 3 to 14 percent of tracker users. One study found people slept 10 percent worse during a tracking week and skipped evenings out to protect the number. If you recognize that loop, run the 7-night experiment below.

The 7-night hide-the-score experiment

Keep wearing it, but do not open the app in the morning for seven days.
Instead, write three things when you get up: time in bed, time up, how rested out of 5.
On night 8, open the app and compare. Most people find their feel and the data agree on the big things and disagree on the stages, which tells you which number to trust.

If you do not want a tracker

You do not need one. The clinical sleep diary is four items: how long it took to fall asleep, how many times you woke, when you got up, how you feel. Those four predict your mornings as well as any device, and they are free. Everything in my protocol works without a wearable.

Questions people ask

Are WHOOP and Oura accurate for sleep?

Reliable for sleep versus wake, bedtime, wake time and total sleep. Only fair to moderate for sleep stages. Read weekly trends, not single nights.

Is it bad to track your sleep?

For 3 to 14 percent of users the data causes anxiety that worsens sleep, called orthosomnia. If the score runs your mood, hide it for seven nights and rate your mornings by feel.

Do I need a tracker to fix my sleep?

No. A four-line morning diary (time to fall asleep, wakings, wake time, how you feel) works, and every part of the protocol runs without a device.

Which sleep tracker does Amanda Monger use?

A WHOOP, every night, read as weekly trends. Her affiliate link is join.whoop.com/amandamonger and she says so wherever she shares it.

Want the whole system in one place?Sleep Through The Night is my exact protocol: the wake-time anchor, the kitchen-closes rule, the bed rule, the phone lock, the wide-awake cheat sheet, and the first-week plan, for $19.99.
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