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Sleep & Stress

How Chronic Stress Shows Up in Your Body — What the Research Shows

You know you’re stressed. But you might not know how many of the symptoms you’re putting down to other things are actually connected to it.

As a CNM Qualified Naturopathic Health Coach, KHDA approved and trained at the College of Naturopathic Medicine, I work with women across Dubai and the GCC who come to me saying they can’t sleep, their digestion is off, their weight won’t budge, and they feel anxious for no clear reason. Research consistently shows these can all be signs that your body’s stress system has been running too hard for too long.

What does your body do when it’s stressed?

Research has established that when your brain detects a threat — real or perceived — it triggers a cascade of changes designed to help you respond quickly. Studies have found that this involves the release of several hormones, including cortisol (your body’s main stress hormone) and adrenaline, which prepare your body for action.

Research shows this system is designed for short bursts. Studies have found that once the threat passes, your body is meant to return to a calm, recovery state. The problem, as research consistently shows, is that modern life keeps this system switched on far longer than it was designed to run.

Scientists have found that when the stress response stays active over weeks and months, it begins to affect almost every system in the body.

How does stress affect sleep?

Research has found that elevated cortisol — your body’s main stress hormone — directly interferes with the hormones that promote sleep. Studies show that cortisol and melatonin (the hormone that helps you fall and stay asleep) work in opposition: when one is high, the other tends to be low.

Research from Harvard has found that chronic stress is one of the most common underlying factors in persistent sleep difficulties. Studies consistently show that women under sustained pressure take longer to fall asleep, wake more frequently during the night, and feel less rested in the morning — regardless of how many hours they spend in bed.

How does stress affect digestion?

Research has found that the gut has its own nervous system — sometimes called the second brain — which is in constant communication with your brain. Studies have shown that when your stress system is active, your body redirects resources away from digestion and towards your muscles and heart.

Research consistently shows this is why many women notice bloating, irregular bowel movements, nausea, or a sensitive stomach during stressful periods. Studies have found that the bacteria balance in the gut can also shift in response to chronic stress, affecting how well food is broken down and nutrients are absorbed.

How does stress affect hormones and weight?

Research published in the journal Psychosomatic Medicine has found a direct link between sustained stress and the accumulation of fat stored deep around the organs — particularly in the belly area. Studies suggest that cortisol plays a central role in this, as research has shown it signals to the body to store energy rather than use it.

Research has also found that chronic stress interferes with the hormones that control hunger and fullness. Studies have shown that sustained high cortisol raises the hormones that drive hunger and reduces the hormones that signal when you’ve had enough — which research suggests is why stress often leads to increased appetite and cravings for high-energy foods.

Scientists have also found that stress can affect thyroid function. Studies suggest that when your body’s stress system is persistently active, it can dampen the output of thyroid hormones — which research has linked to a slower metabolism and lower energy levels.

How does stress affect mood and mental clarity?

Research has found that prolonged activation of your body’s stress system can affect the areas of the brain involved in memory, focus, and emotional regulation. Studies have shown that women under chronic stress are significantly more likely to report brain fog, difficulty concentrating, low mood, and a short fuse.

Research has also found that the gut and brain communicate constantly — and that the balance of bacteria in the gut influences the production of mood-regulating chemicals. Studies suggest that when stress disrupts gut health, this can in turn affect how you feel emotionally, creating a cycle that goes both ways.

What you can do today

Research consistently shows that the body’s stress system is highly responsive to input — which means the changes you make have a measurable effect.

Studies have found that even brief periods of slow, intentional breathing — five minutes, twice a day — can shift your body towards its rest-and-recovery mode. Research shows this is one of the most accessible and well-evidenced stress tools available.

Explore the sleep and stress page for more on how a naturopathic approach addresses the full picture. If you’d like personal support, learn more about working with me as a CNM health coach in Dubai.


One thing you can do today:
Try five minutes of slow breathing before bed tonight — four counts in, six counts out. Research shows this activates your body’s rest-and-recovery mode and is one of the most evidence-backed stress tools available.

If you’d like support with this:
I work with women in Dubai and across the GCC as a CNM Qualified Naturopathic Health Coach. If stress is affecting your sleep, digestion, or weight, I’d love to help you join the dots. Learn more about working with me →

This article is for educational purposes only and does not constitute medical advice. If you have concerns about your health, please speak with your GP or a qualified medical professional.


Farkhanda J Mohammad

CNM Qualified Health Coach · KHDA Approved · Dubai, UAE

A certified health coach trained at the College of Naturopathic Medicine, helping women in Dubai and beyond build the health their GP doesn't have time for.

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