Sleep health

How you sleep shapes how you live.

You may think you slept eight hours. But what was actually happening while you slept? Start here — no prior knowledge needed — and go as deep as you want.

What is sleep apnea?

Did you know breathing can stop dozens of times a night without you ever remembering it?

Sleep apnea is a condition where breathing repeatedly stops or becomes disrupted while you are asleep. Each pause can last seconds, it can happen many times an hour, and the body usually resolves it with a brief arousal too short to remember.

There is more than one reason breathing can be interrupted at night, and the reason matters — it changes what evaluation and what treatment make sense for you.

Why check at all

You brush your teeth every day. You still get them checked.

Did you know a daily habit can be done well and still hide what a professional check would find?

Brushing and flossing are healthy daily habits. They are also not a substitute for a checkup, because a habit cannot show you what is happening below the surface. A dentist can identify problems you cannot see or feel yet.

You sleep every day, too. But when was the last time anyone actually checked your sleep?

A clock can tell you that you were in bed for eight hours. It cannot tell you what happened during them — how much of that time you were actually asleep, how your breathing behaved, whether your oxygen level dropped, or what your heart rate was doing overnight. Depending on the specific test used, those are the kinds of signals a medical-grade sleep study evaluates.

You don't wait for a root canal to start caring about your teeth. Why wait for a serious health problem to start understanding your sleep?

What checking your sleep actually looks like now

An FDA-cleared medical-grade home sleep test is prescribed after a physician review, worn in your own bed, with results explained in plain language and an optional sleep-physician consultation. It is designed to evaluate sleep-disordered breathing, including obstructive sleep apnea.

One home study does not detect every sleep disorder, and no test prevents a condition. What it does is give you and a physician real information — early enough to be useful — and a clear read on whether further evaluation, an in-lab study, or specialist care is the appropriate next step.

Obstructive Sleep Apnea

The airway narrows, and airflow drops.

Did you know the most common form of sleep apnea is a plumbing problem, not an effort problem?

In obstructive sleep apnea the soft tissue of the upper airway narrows or collapses during sleep. Your body is still trying to breathe — the chest and diaphragm keep working — but airflow is reduced or blocked until the airway reopens.

Snoring is the sound of a partly narrowed airway, so it is a common clue. Snoring is not required, though, and someone who snores should never be assumed to know anything is happening. The person who notices is usually sleeping next to them, and often no one notices at all.

What raises the odds of obstructive apnea

Thin, fit people get obstructive sleep apnea too. Anatomy is often the deciding factor, which is why testing beats guessing from appearance.

Anatomy: a narrow airway, large tonsils, nasal obstruction, jaw position.
Weight gain, particularly around the neck and abdomen.
Sleeping on your back, alcohol in the evening, and some sedating medications.
Age, family history, and menopause.

Central Sleep Apnea

The signal to breathe does not arrive.

Did you know not all sleep apnea is caused by a blocked airway?

Your brain sends signals to the muscles that control breathing — the diaphragm and chest wall. In central sleep apnea the brain temporarily fails to send that signal, so breathing pauses even though the airway is open and nothing is physically blocking it.

Central events may not fit the stereotypical picture of loud snoring and a blocked airway, though snoring and other outward signs can still be present. Because symptoms alone are unreliable, objective medical-grade sleep testing and an appropriate physician evaluation are what detect and characterize the breathing pattern.

Why central apnea is evaluated differently

Central apnea is less common and is more often associated with heart failure, certain neurologic conditions, opioid medications, or high altitude. It also sometimes appears during treatment of obstructive apnea.

It generally calls for a physician's assessment of the underlying cause rather than a standard airway-focused approach, and often for more comprehensive testing than a basic home study.

Mixed patterns

Obstructive and central events in the same person.

Did you know one night can contain both kinds of event?

Obstructive and central events can occur in the same person, sometimes within the same night and occasionally within a single event. Mixed patterns usually point toward a more comprehensive evaluation, frequently with a sleep specialist or an in-lab study, because the right treatment depends on which mechanism dominates.

Hours versus information

Sleep is more than the number of hours on a clock.

Time in bed, total recording time and actual sleep time are three different numbers, and none of them describe how your body behaved overnight. Sleep moves through stages, including REM and deeper sleep, and breathing, oxygen and heart rate can shift from stage to stage and hour to hour.

In-lab polysomnography uses EEG and other channels for comprehensive sleep staging. Certain FDA-cleared home technologies estimate or derive sleep time and staging from other physiologic signals — clinically validated for what they are designed to do, but not identical to EEG-based staging. We tell you what your specific test measures instead of implying it does everything.

What testing evaluates

What medical-grade home sleep testing can measure.

That data is analyzed, and your report is explained in plain language — with an optional sleep-physician consultation when you want expert review. Home sleep apnea testing is well validated for identifying moderate to severe obstructive sleep apnea in adults who have symptoms and no significant complicating conditions.

Which of these measures appears on a report depends on the device used. That is a feature of being specific, not a limitation we hide.

Breathing and respiratory events through the night
Blood oxygen levels, how far they drop, and how long they stay down
Heart rate overnight
Estimated sleep time and derived sleep stages, where the specific test supports it
Snoring, body position and hypoxic burden, on devices that report them

Wearables

A smartwatch can track wellness. Medical-grade testing is designed to evaluate.

A watch or ring can be genuinely useful. It tracks trends, estimates sleep, and can nudge you to pay attention. That is wellness information, and it has real value.

It is not interchangeable with prescribed, FDA-cleared medical-grade diagnostic testing. Consumer devices are not cleared to diagnose sleep apnea, and their estimates are not what a physician bases a diagnosis or a treatment decision on. A wearable alert is a good reason to investigate. It is not a diagnosis.

Your results

Results that help determine what comes next.

Get answers. Understand what they mean. Know what comes next. Sometimes results support a diagnosis and a treatment decision. Sometimes they point to additional evaluation, a sleep physician consultation, or an in-lab study instead.

A home sleep test is designed to identify common signs of sleep-disordered breathing, primarily obstructive sleep apnea. It does not diagnose every sleep disorder — not insomnia, narcolepsy, restless legs syndrome, periodic limb movement disorder, parasomnias or circadian rhythm disorders — and a result that does not match your symptoms is itself a reason to keep looking.

When an in-lab study or specialist evaluation is the right next step

In-lab polysomnography records brain activity, eye movement, muscle activity, breathing, oxygen, heart rhythm and leg movement with a technologist present. It is the more complete study.

It is generally the appropriate next step when a home test is inconclusive or negative despite strong symptoms, when another sleep disorder is suspected, when central or mixed events appear, or when significant heart, lung or neuromuscular conditions are present.

Early clues

The signs worth acting on are quieter than people expect.

The most useful signal is a change from your own normal. You do not need to wait for something alarming to be worth measuring.

You wake up tired even after a full night.
You are sleepy during the day, or you crash halfway through it.
You need more caffeine or quick energy than you used to just to keep going.
You regularly feel like you need a nap.
You snore, or someone has told you that you snore.
Sleep does not feel as restorative as it used to.

Treatment

Treatment is individualized, not automatic.

There is no rule that mild or moderate apnea means an oral appliance and severe apnea means CPAP. Severity is one input among many. Anatomy, other medical conditions, medications, weight, sleep position, alcohol, comfort, travel, relationships, preferences and how likely someone is to keep using a therapy all matter.

Your results come first. Treatment comes second. Heart Waves is vendor neutral — we are not tied to a device, therapy or partner, and the direction is chosen by you with licensed clinicians.

The realistic range of options

Every one of these needs proper clinical management. Therapies work far better with support than without it.

Positive airway pressure (PAP/CPAP and its variations), with pressure setup, mask fitting and adherence follow-up.
Oral appliance therapy, fitted and adjusted by a qualified dental sleep provider, with follow-up for both effectiveness and bite changes.
Positional therapy, weight and lifestyle approaches, and treatment of nasal or airway obstruction.
Additional or in-lab testing, and sleep specialist evaluation.
For appropriately selected patients, surgical or implantable options such as upper-airway stimulation.

Risk

Healthy habits matter. So does what you can't control.

Did you know fit, healthy-weight people are regularly diagnosed with obstructive sleep apnea?

You can eat well, train hard, keep a healthy weight and feel fine, and still have disrupted breathing at night. Someone with far less disciplined habits may have none. Risk doesn't always look the way you expect.

You can't know your health by looking at someone. And you can't always know it by how you feel — sleep-disordered breathing happens while you are unconscious, and the daytime version of it usually just feels like being busy and tired.

An estimated 80% of obstructive sleep apnea cases may remain undiagnosed. Untreated sleep apnea can strain the heart and blood vessels and raise the risk of high blood pressure, heart disease, stroke, and type 2 diabetes.

Airway anatomy: jaw and tongue position, nasal obstruction, tonsils, neck structure.
Age, family history, and hormonal changes including menopause.
Weight — a real factor, but far from the only one.
Medications and substances, particularly sedatives, opioids and evening alcohol.
Medical conditions such as heart failure, atrial fibrillation, hypothyroidism and stroke.

Why we don't reduce this to lifestyle

Every factor matters. Treating sleep apnea as a weight or willpower problem is how it gets missed in the people who look healthiest — and how people who do have it end up blaming themselves instead of getting evaluated.

Why Heart Waves

Healthcare shouldn't begin only when something goes wrong.

Between work, family and everything else, a slow slide in how you sleep is easy to normalize. Your body does not put a warning light on the dashboard, and scheduling a sleep evaluation has traditionally meant referrals, waiting and a night away from your own bed.

Heart Waves exists to remove that friction: FDA-cleared medical-grade diagnostic testing at home, clear results explained plainly, an optional physician consultation, and a straightforward description of the appropriate next step — whether that is reassurance, further testing, or specialist care.

Earlier information does not guarantee anything. It gives you the chance to act sooner if there is something to act on. From home, and built around your life.

Home sleep testing identifies common signs of sleep-disordered breathing. It does not rule out every sleep condition, and results are always interpreted by a physician in the context of your symptoms and history.

Sources

Take the Heart Quiz Take the Sleep Quiz

This page is general health education, not medical advice, and it does not diagnose any condition. If you have chest pain, fainting, or severe shortness of breath, call 911 or go to the nearest emergency room.