The Connection Between Weight Loss & Sleep Apnea
- Dr. Brenda Tapp Leonard, ND

- Dec 29, 2025
- 4 min read
Many New Year’s resolutions revolve around weight loss. I’m guilty of making these resolutions too, but this year we’re tossing resolutions in favour of something more intentional.
Part of my intention for the year is doing more of what I love, and what brings me joy is teaching you the lesser-known things that meaningfully impact your health in ways Google and ChatGPT simply can’t strategize for you.
So let’s talk about one of the most overlooked barriers I see (especially in women), and that is sleep apnea and how it impacts weight loss.
Here’s the truth I wish more people knew: If you’re doing everything right and the scale still won’t budge, your problem might not be your hormones, diet, metabolism, or willpower. It might be sleep apnea.
When you stop breathing repeatedly overnight, even briefly, your body pays for it all day long.
Your metabolism slows
Appetite hormones go haywire
Cortisol stays high and keeps you in “storage mode”
Fatigue makes workouts feel impossible
Inflammation climbs
You cannot out-discipline physiology. You can’t out-diet a condition that’s happening in your sleep. And here’s the kicker...weight gain worsens sleep apnea, and sleep apnea worsens weight gain. It’s a cycle, and once you’re stuck in it, no amount of clean eating or perfect macros will break it.
Research shows that even a tiny 10% increase in body weight predicts a 32% rise in the apnea–hypopnea index (AHI), the measure of how often you stop breathing at night. That same small weight gain increases the odds of developing moderate-to-severe sleep apnea by six fold.
Obstructive sleep apnea itself promotes weight gain in the following ways:
Sleep fragmentation disrupts hormones that regulate appetite. Ghrelin rises (meaning more hunger) while leptin falls (meaning less fullness).
Sympathetic over-activation throws the body into “storage mode.”
Insulin resistance increases, making fat loss far more difficult.
Daytime fatigue reduces physical activity, even in highly motivated people.
Why Women Constantly Get Overlooked For A Sleep Apnea Diagnosis
Most women with sleep apnea don’t present as the textbooks say. Instead of classic loud snoring, women tend to show up with:
Insomnia
Fatigue
Anxiety
Morning headaches
Unexplained weight gain
Difficult controlling their blood pressure
Night sweats
PS. Snoring has terrible diagnostic accuracy anyway. Up to 50% of people with sleep apnea don’t snore at all.
So Why Aren’t People Testing For Sleep Apnea?
The #1 excuse is “There’s no way I’m sleeping in a clinic hooked up to wires.” I get it. Truly. But here's the thing, avoiding testing doesn’t make apnea go away.
It just keeps you stuck.
If you've worked with me in the past, you know that I am pro-testing even when the results may be scary. Why? Knowledge is power. Simply put, you can't treat what you don't know exists. Once you understand your diagnosis, you can work towards managing symptoms, restoring quality of life and potentially enter remission.
No More Excuses: Testing For Sleep Apnea At Home
This is where things get beautifully simple... Before sending anyone to a full sleep lab, I often recommend a home wearable device like the SleepImage CheckMe O2 Ring, which we rent out to patients for $50.
Why people love at-home sleep apnea testing:
You sleep in your own bed
No awkward wires
No clinic anxiety
The device mentioned about is FDA-approved for diagnosing sleep apnea, and gives us real insight into whether you need formal testing by measuring oxygen drops and patterns that strongly correlate with apnea
Is it as sensitive as an in-lab study? No, and it’s not trying to be. The wearable's job is to give us an early, reliable signal instead of letting you drift for years without answers.
What Happens Next If Your Home Test Suggests Sleep Apnea?
Then we move to the gold standard of testing which is a sleep clinic study. By that point you understand the why, and the fear of an overnight sleep clinic test is gone. It now feels like the next smart step in your health strategy.
Traditional Sleep Apnea Treatment Is NOT Your Only Option
Another point of resistance in diagnosing sleep apnea is the belief that a CPAP machine is the only way forward. Patients often share with me that there is no way they will wear the machine, even if they do test positive for sleep apnea.
I get it, but I guarantee that modern CPAP machines are far less clunky, noisy, or intimidating than what you’re picturing. Are they sexy? Not really. But neither is feeling exhausted, inflamed, and stuck. What is sexy is you taking control of your health to feel better, and if a tool helps you reach your long-term health goals, maybe it’s worth considering.
It's also not the only solution. Beyond CPAP, there are a multitude of other options to support your sleep apnea, including:
oral appliances fitted by a dentist
anti-snoring mouth guards
oral myofunctional therapy
positional therapy
nasal strips
and more.
The goal isn’t to force one solution; it’s to find the approach that actually helps you breathe, sleep, and finally make progress again.
So if you've been fatigued and struggling to lose weight no matter what you try, sleep apnea may be the invisible barrier you’ve never been checked for.
Did I convince you that it’s worth investigating now??




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