How Obesity Impacts Sleep and Sleep Apnea

Published date: June 23, 2026 |

Estimated read time: 6 minutes |

Authored by:

AdventHealth

Topics:

Health and Wellness

Quality sleep is essential to achieve whole health and help us to live life to the fullest. However, some health conditions, such as obesity, can make it hard to get proper rest every night. Obesity is a main risk factor for obstructive sleep apnea, a condition that affects breathing during sleep.

To better understand the relationship between obesity, quality of sleep and sleep apnea, our experts are here to weigh in on how obesity contributes to sleep apnea, whether weight loss helps and common treatment options. Keep reading to learn more.

The Obesity-Sleep Connection

Adults typically need between seven and eight hours of quality sleep each night to stay healthy and allow their bodies to function properly.

Quality sleep means falling asleep within 30 minutes of closing your eyes and waking up no more than once each night. A good night’s rest leaves you refreshed, energized, and ready to start your day.

There are many health conditions that can reduce your chances for quality sleep that are related to or can be exacerbated by obesity, including:

What Obstructive Sleep Apnea Is and Why It Matters

Obstructive sleep apnea is a sleep disorder caused by extra body fat around the neck and throat. When you lie down, the excess fat can restrict or "obstruct" your breathing pathways.

Excess abdominal or visceral fat can also strain the diaphragm, making it harder to breathe during sleep.

If your body doesn't get enough oxygen while you sleep, it may suddenly wake you to help you breathe. This disrupts the sleep-wake cycle and leads to disturbed sleep.

Losing weight can help with sleep apnea by reducing the impact of excess body fat on breathing.

How Obesity Increases Sleep Apnea Risk

Researchers estimate that between 60% and 70% of people living with obesity also have sleep apnea.

Carrying too much body weight increases your risk for obstructive sleep apnea through:

Creating excess body fat around your neck and airway narrows your airway, especially when you're lying down, and restricts airflow.
This increases the risk of airway collapse due to the pressure exerted by excess body fat.
Reducing the amount of oxygen your lungs can breathe in due to extra abdominal fat.
Resistance to the hormone leptin, which signals to your body when you're full and has a direct impact on how the muscles required to keep your airway open work.

While obesity is a risk factor for sleep apnea, excess weight is not the only cause. Other factors can compound severity, including:

Alcohol use
Certain diseases, including cardiovascular disease, Type 2 diabetes and polyendocrine metabolic ovarian syndrome (PMOS)
Family history of sleep apnea
Gender — men at a higher risk of sleep apnea than women
Medications like opioids, narcotics, sedatives, antidepressants, antihistamines and testosterone therapy
Nasal congestion from a cold or allergies
Smoking

Commonly Missed Signs and Symptoms

Now that you have a better understanding of the connection between obesity and sleep apnea, let’s talk about the signs and symptoms of obstructive sleep apnea.

Some common symptoms of obstructive sleep apnea include:

Abruptly waking up, choking or gasping for air
Breathing pauses when asleep
Constantly tossing and turning when trying to sleep
Daytime sleepiness and fatigue, despite getting seven to eight hours of sleep
Frequently waking up when sleeping
Loud snoring
Waking up with a headache

Some other less-known signs of sleep apnea are:

Cognitive issues, such as memory problems or "brain fog"
Constantly getting up to urinate at night
Decreased libido or sexual dysfunction
Low motivation
Mood changes, such as depression or anxiety
Teeth grinding (bruxism)
Uncontrollable high blood pressure
Unexplained weight gain
Waking up with a very dry mouth or sore throat

Additionally, men and women generally experience sleep apnea symptoms differently, making diagnosis more difficult:

Women may have milder or less obvious symptoms of sleep apnea, which can easily be mistaken for menopause or the effects of aging.
Men are more likely to have frequent loud snoring and pronounced nighttime symptoms, but their daytime symptoms, such as tiredness or cognitive difficulties, are often less recognized or attributed to sleep apnea.

How Sleep Apnea Is Diagnosed

If you suspect that you or a loved one has obstructive sleep apnea, there are a few steps to getting an accurate diagnosis.

First, make an appointment with your AdventHealth primary care doctor (PCP) for a full medical exam. Talk about the symptoms that may point to obstructive sleep apnea. Your doctor can also look for other issues that might affect your nighttime breathing, such as enlarged tonsils.

Additionally, your provider may administer the STOP-BANG questionnaire that can help them evaluate your sleep quality and risk for sleep apnea:

S: Snoring loudly at night
T: Tired during the day
O: Observed stopped breathing while you sleep
P: Pressure — being treated for high blood pressure
B: BMI (body mass index)
A: Age — your age
N: Neck circumference 16 inches or more
G: Gender — males at a higher risk for sleep apnea than females

After that, you may be referred to a sleep medicine specialist for testing to diagnose or rule out sleep apnea. These tests may include:

Drug-induced sleep endoscopy is when a doctor sedates you to simulate sleep and uses a small camera in your airway to help pinpoint where your airway may be obstructed during sleep.
Fiber-optic endoscopy uses a small camera to examine your upper airway while awake.
Home sleep apnea testing (HSAT) is usually for mild sleep apnea and can be done at home.
In-lab polysomnography is an overnight sleep study performed at a sleep center. This test monitors your breathing and your sleep quality.

There are two main metrics a sleep specialist uses to determine whether you have sleep apnea and its severity. These include:

Apnea-hypopnea index (AHI) shows how often your breathing stops or becomes too shallow in an hour. Between 15 and 29 events means moderate sleep apnea. Thirty or more signals severe sleep apnea.
Oxygen desaturation measures how much your oxygen levels drop while you sleep. An oxygen drop of 3% to 4% is typically a sign of sleep apnea.

Sleep Apnea Treatment Options and What to Expect

There’s a strong link between obesity and sleep apnea, and there are effective treatment options. Patients often ask if losing weight helps with sleep apnea. Yes, weight loss can reduce or even reverse sleep apnea symptoms, and there are ways to help you lose weight and keep it off.

AdventHealth Bariatric and Weight Care can help you with the following:

Bariatric surgery
Healthy lifestyle changes
Minimally invasive surgery
Nutrition and behavioral counseling
Weight loss medications like GLP-1s
Weight management

While losing weight helps, other treatments may also be needed. Your doctor might suggest additional options, including the following:

Home machines, such as a continuous positive airway pressure (CPAP) or bilevel positive airway pressure (BiPAP) machine, provide constant air pressure while you sleep, helping your airways remain open.
Hypoglossal nerve stimulation, an implanted device that stimulates your tongue's nerves, helps keep your airway open.
Oral appliances, such as a mandibular advancement device, help keep the tongue from obstructing your airway.
Orofacial therapy helps to strengthen the muscles around the mouth and throat.
Surgery, such as uvulopalatopharyngoplasty (UPPP) to remove excess tissue in your throat, maxillomandibular advancement (MMA) to correct jaw issues or nasal surgery.

In December 2024, Zepbound (tirzepatide) received U.S. Food and Drug Administration (FDA) approval. It is now the first medication to help treat moderate to severe obstructive sleep apnea in adults who are obese.

Take the Next Step With AdventHealth for Sleep Apnea and Bariatric Support

Sleep apnea can profoundly impact your whole health and day-to-day life. Not getting enough sleep at night leaves you feeling sluggish and tired, making it harder to get enough physical activity, which can lead to unhealthy food choices. It creates a vicious cycle between obesity and sleep apnea, making weight loss more difficult.

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