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Sleep / Guide

Weight and snoring

By: NefeslyLast updated: 2026-10-30

Weight is one of the factors that affect snoring and sleep apnea.

How does weight affect the airway?

Extra fat tissue around the neck can make it harder for the throat to stay open during sleep. Extra soft tissue around the upper airway can also narrow it. More than half of people with sleep apnea are overweight. Still, weight alone does not make a diagnosis, and people who are not overweight can also have sleep apnea because of the shape of their jaw and face.

What losing weight may do

Even a small amount of weight loss can ease symptoms for some people. The Turkish Thoracic Society report states that losing 10 to 15 percent of body weight may cut the frequency of breathing pauses by about half. For this reason, weight loss programmes are recommended as part of treatment for people who are overweight.

Gentle and realistic steps

Losing weight is not easy for everyone, and some people struggle despite all their efforts. That is why the best results often come from a plan made together with a doctor and a dietitian. If lifestyle does not change for good, lost weight can come back. Untreated sleep apnea itself may also make weight gain easier, so the two can feed each other.

What else can help?

Weight loss is considered alongside other treatments, not instead of them. The most effective treatment for sleep apnea is a CPAP device, which keeps the airway open during sleep. If someone has seen your breathing stop, or you are very sleepy during the day, talk to a doctor without waiting to lose weight. Your doctor can look at the right treatment and a weight plan together with you.

For expertsdefinitions, thresholds, guidelines

In the Wisconsin Sleep Cohort (n=690, 4 years of follow-up), compared with stable weight, a 10% weight gain predicted an increase of about 32% (95% CI 20 to 45) in AHI and a 10% weight loss a decrease of 26% (18 to 34); a 10% weight gain increased the odds of developing moderate to severe sleep-disordered breathing 6-fold (2.2 to 17.0).1

In a meta-analysis of 9 studies (577 patients) on dietary weight loss, BMI fell by an average of 4.8 kg/m²; the AHI decreased by 14.3 per hour (95% CI 5.1 to 23.5) compared with control. However, the events did not disappear completely; the authors recommend weight loss as an addition to treatment.2

The ATS 2018 guideline strongly recommends a comprehensive lifestyle programme of calorie-restricted diet, physical activity and behavioural support for overweight or obese patients with OSA; diet or exercise alone is a conditional recommendation. Medication and bariatric surgery are for selected patients.3 The ERS 2021 guideline conditionally recommends considering bariatric surgery in obese patients who do not lose weight despite a comprehensive programme (very low certainty).4

Limitations: most studies are short; weight regain and methodological constraints are common.

  1. Peppard PE, Young T, Palta M et al. Longitudinal Study of Moderate Weight Change and Sleep-Disordered Breathing. JAMA. 2000;284(23):3015-3021. doi:10.1001/jama.284.23.3015
  2. Anandam A, Akinnusi M, Kufel T et al. Effects of dietary weight loss on obstructive sleep apnea: a meta-analysis. Sleep and Breathing. 2013;17(1):227-234. doi:10.1007/s11325-012-0677-3
  3. Hudgel DW, Patel SR, Ahasic AM et al. The Role of Weight Management in the Treatment of Adult Obstructive Sleep Apnea. An Official American Thoracic Society Clinical Practice Guideline. American Journal of Respiratory and Critical Care Medicine. 2018;198(6):e70-e87. doi:10.1164/rccm.201807-1326ST
  4. Randerath W, Verbraecken J, de Raaff CAL et al. European Respiratory Society guideline on non-CPAP therapies for obstructive sleep apnoea. European Respiratory Review. 2021;30(162):210200. doi:10.1183/16000617.0200-2021

Sources

  1. Turkish Thoracic Society. Consensus Report on the Diagnosis and Treatment of Obstructive Sleep Apnea Syndrome. Turkish Thoracic Journal, 2012;13(Suppl 1).
  2. Başkent University Adana Hospital. Obstructive Sleep Apnea Syndrome: patient information leaflet (in Turkish). Undated.
  3. National Heart, Lung, and Blood Institute (NIH). Your Guide to Healthy Sleep. 2011.

Disclosure: this article has no sponsor.