15 questions · direct answers
Common questions about sleep and sleep testing
Short, direct answers to the questions people ask most. Each answer links to a longer article when you want more detail. Nothing here is a diagnosis; if something sounds like your situation, bring it to your own clinician.
Sleep basics
How much sleep do adults need?
Most adults do best with 7 to 9 hours a night, according to the American Academy of Sleep Medicine and the Sleep Research Society. Individual needs vary; regularly feeling unrefreshed after a full night is a better signal than the number alone.
What does “sleep quality” mean?
How restorative your sleep is — how quickly you fall asleep, how often you wake, how much deep and REM sleep you get, and how you feel the next day — rather than how many hours you were in bed.
Is it normal to wake up during the night?
Yes. Brief awakenings between sleep cycles are normal and usually forgotten. Waking often and struggling to fall back asleep, most nights, for weeks, is worth looking into.
Sleep hygiene and routines
What is sleep hygiene?
The everyday habits and surroundings that make good sleep more likely: a regular wake time, morning daylight, daytime activity, limiting caffeine later in the day, and a dark, quiet, cool bedroom. It supports sleep; it does not treat a sleep disorder on its own.
How long does it take for new sleep habits to work?
Most people notice a difference after two to four consistent weeks. Judge a habit after a few weeks, not a few nights.
Should I stay in bed if I can’t sleep?
If you have been awake for what feels like 20 minutes or more, getting up, doing something calm in dim light, and returning when sleepy usually works better than lying there. It protects the link between bed and sleep.
Are naps bad?
Not inherently. Short naps (20–30 minutes) before mid-afternoon can help. Long or late naps make it harder to fall asleep at night.
Sleep apnea
What are the most common signs of sleep apnea?
Loud, regular snoring; pauses in breathing or gasping noticed by a partner; waking with a dry mouth or headache; and feeling sleepy during the day despite a full night in bed.
Is snoring always sleep apnea?
No. Many people snore without sleep apnea. Snoring with pauses, gasping, or daytime sleepiness is the combination worth raising with a doctor.
What is the STOP-Bang questionnaire?
An eight-question screening tool (snoring, tiredness, observed apneas, blood pressure, BMI, age, neck size, gender) that estimates how likely obstructive sleep apnea is. It screens; it does not diagnose.
Sleep testing
What is the difference between a home sleep test and an in-lab sleep study?
A home sleep apnea test records breathing, oxygen, heart rate, and position in your own bed and is used when obstructive sleep apnea is strongly suspected. An in-lab polysomnogram records many more signals, including brain activity, and is used for complex cases or when a home test is unsuitable or inconclusive.
What does a home sleep apnea test measure?
Typically breathing effort or airflow, oxygen saturation, heart rate, snoring, and body position over one night. Most do not record brain activity, so they estimate sleep rather than measure it directly.
Who should not have a home sleep test?
Guidelines generally recommend an in-lab study instead for people with significant heart failure, chronic lung disease, neuromuscular conditions, long-term opioid use, or a suspected sleep disorder other than obstructive sleep apnea. Your clinician decides which test fits.
How long does a sleep study take?
One night. Home tests need at least four hours of usable recording; in-lab studies run overnight in a laboratory, occasionally with a daytime component for specific conditions.
Is a sleep study covered where I live?
It depends on your country and, in Canada, your province. Our regional guides explain how referral and public or insurance coverage generally work, with links to official sources.