Obesity and sleep apnea are closely connected, but the relationship is not that simple. Knowing how the two conditions influence one another can help you take meaningful steps toward better health.

In this article, you’ll learn whether obesity increases the chance of developing sleep apnea. You’ll also find strategies to manage both conditions.

What Is Obesity?

Obesity is a chronic health condition characterized by excess body fat. It may cause an increased risk for complications such as type 2 diabetes and heart disease. Healthcare providers often use body mass index (BMI) to help identify and classify obesity. A BMI of 25 to 29.9 is considered overweight, while a BMI of 30 or more is classified as obesity.

Obesity is more than a matter of weight alone. It’s linked to genetics, as well as changes in hormones, inflammation, and metabolism. It can affect many body systems, including sleep and respiratory health.

How Obesity Is Linked to Sleep Apnea

Sleep apnea is a sleep disorder in which a person breathes shallowly or stops breathing multiple times during the night. The most common type, obstructive sleep apnea (OSA), happens when the upper airway becomes blocked or narrowed during sleep. This can cause symptoms such as:

• Loud snoring
• Gasping for air or choking
• Trouble sleeping through the night
• Morning headaches
• Excessive daytime sleepiness (feeling of tiredness the next day due to poor sleep quality)

Carrying excess weight is one of the strongest risk factors for developing OSA. In fact, research shows that between 60 percent and 90 percent of people with OSA also carry extra weight. According to the American Academy of Sleep Medicine, even just a 10 percent increase in body weight can raise the risk of developing sleep apnea sixfold.

Several changes in the body may help explain why, as discussed below.

Excess Fat Around the Neck and Airway

Carrying extra weight, especially around the upper airway and neck, can physically narrow or block the airway during sleep. Fat deposits in this area can restrict airflow, making it more difficult to breathe normally when sleeping.

Increased Abdominal Fat

Excess belly fat can push up on the chest, making it harder for the lungs to expand. This reduces airflow and increases the chances of breathing problems at night.

Higher Inflammation Levels

Obesity can raise inflammation levels in the body. This may increase the chance of developing sleep apnea and make OSA events more severe.

How Sleep Apnea Can Affect the Body

Sleep apnea doesn’t just affect breathing. It can also change how the body manages hunger, cravings, and energy.

Repeated sleep interruptions can interfere with hormones that help regulate appetite. For example, lower levels of leptin (a hormone that helps you feel full) and higher levels of ghrelin (a hormone that increases hunger) are common when sleep is disrupted. These changes can make people feel hungrier during the day and more likely to crave calorie-dense foods.

Daytime fatigue is another common side effect of poor sleep. When people feel overtired, they often have trouble staying active, which can make weight management harder. Over time, this cycle of fatigue, cravings, and reduced activity may lead to weight gain and make it harder to maintain healthy routines.

Understanding these connections may allow individuals to work with their healthcare teams to address risk factors and improve overall health.

Can Weight Management Help With Sleep Apnea?

Weight loss can play a major role in reducing the severity of obstructive sleep apnea, especially for people living with obesity. Excess weight in the neck, throat, and abdomen can narrow the airway and make breathing harder during sleep. For that reason, losing weight can ease this pressure and improve airflow.

Even modest weight loss has been shown to lower OSA severity. Research shows that losing 5 percent to 10 percent of body weight may help reduce the severity of sleep apnea events. In addition, people who lose weight may also reduce the risk of cardiovascular disease and sleep apnea symptoms.

The U.S. Food and Drug Administration (FDA) approved tirzepatide (Zepbound) as the first medication specifically for moderate to severe OSA in adults with obesity. Zepbound works by supporting significant weight loss. This, in turn, can help reduce airway obstruction and improve sleep apnea severity. Doctors often prescribe Zepbound alongside increased physical activity and a healthy eating plan for best results.

Keep in mind that improving sleep apnea symptoms often requires more than one approach. Weight management through healthy eating, regular movement, medication, or a combination of these approaches is one of the most effective ways to improve breathing during sleep. Many people find that as they lose weight, their sleep apnea symptoms improve. This is sometimes even enough to reduce the need for continuous positive airway pressure therapy (CPAP therapy), the most common sleep apnea treatment.

If you’re wondering how weight management can reduce the risk of sleep apnea, talk to your doctor. Together you can create a holistic treatment plan to address your concerns.

Managing Weight and Sleep Apnea Together

Obesity and sleep apnea are closely linked. But the good news is that managing obesity through healthy lifestyle changes and treatment options approved for obesity and OSA can improve sleep quality, daytime energy, and quality of life. By working with a healthcare provider, you can create a plan that supports better breathing at night and better overall health.

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On MySleepApneaTeam, people share their experiences with sleep apnea, get advice, and find support from others who understand.

Do you deal with other health issues besides sleep apnea? Let others know in the comments below.