For years, research has shown a strong link between sleep and weight loss struggles. Poor or interrupted sleep can contribute to weight gain, which in turn further disrupts sleep, creating a vicious cycle.
With just under 80% of adults in the UK getting less than the recommended seven to nine hours of sleep per night, 14% surviving on fewer than five hours, and around eight to ten million estimated to have Obstructive Sleep Apnoea, it’s clear that sleep deprivation is a widespread issue.
Women appear to be most affected, with 54% struggling with sleep compared to 45% of men.
So how can you adjust your diet to support sleep and weight loss, and how can better sleep help you stay on track with your diet?
Our nutritionist, Mark Gilbert, separates fact from fiction so you can finally rest easy while improving your health.
Can sleep help with weight loss?
The short answer is yes. Many experts consider sleep the third pillar of weight loss, alongside diet and exercise. Quality sleep influences dietary choices, appetite regulation, metabolism and muscle preservation. Conversely, sleep deprivation can make it harder to lose weight and maintain good health.
Does a lack of sleep cause weight gain?
Insufficient sleep is a major risk factor for weight gain. Studies show that adults struggling to get more than seven hours of sleep are more likely to have a higher BMI, increasing the risk of obesity.
Sleep loss affects hunger levels and activity patterns, making people more likely to overeat and be sedentary – both of which contribute to weight gain.
Factors that impact sleep and weight management
There are significant factors that can lead to weight gain. Let’s dive further into these.
Impact on metabolism
Sleep deprivation can lower your Resting Metabolic Rate (RMR), the number of calories your body burns at rest. When sleep-deprived stress levels rise and your body compensates by conserving energy, reducing calories burned.
Calorie intake
Not getting enough sleep sets your brain up to make bad decisions by affecting your frontal lobe, the part of your brain that controls decision-making and impulse control. When you’re sleep deprived, your brain is looking for something that feels good – normally that’s a craving for an extra slice of cake, a takeaway or a calorific latte Frappuccino to wake you up.
Hormones behind hunger
Sleep loss can lead to an increase in appetite. This is due to the two opposing hormones known as ghrelin and leptin. These hormones communicate your body’s energy levels to the brain. Ghrelin signals to the stomach that you need to eat, and opposingly, leptin signals fullness to the brain, suppressing your appetite.
Being sleep deprived increases ghrelin levels and decreases leptin production. The resulting hormonal environment drives you to consume more food despite.
Cortisol, stress and fat storage
Too little sleep can cause stress, which can trigger a spike in your cortisol levels. Cortisol levels should drop at night to allow for rest, but if you can’t sleep, your body is kept in high alert, or ‘fight or fight’ mode.
High cortisol levels rapidly increase blood sugar levels which can lead to fat storage. Unfortunately, this process can leave you stuck in a cycle, the more you are on high alert, the harder it is to sleep, and the harder it is to sleep, the more you are kept on high alert.
Insulin sensitivity
Lack of sleep reduces insulin sensitivity. When your body doesn't respond properly to insulin, your body has trouble processing fats from your bloodstream, so it ends up storing them as fat.
Common sleep disorders that impact weight
Sleep apnoea often both contributes to and results from a high BMI. This condition occurs when airway muscles fail to keep the airway open, leading to interrupted breathing and oxygen drops. Symptoms include loud snoring, pauses in breathing, morning headaches, and daytime sleepiness.
Untreated sleep apnoea can lead to cardiovascular disease and type 2 diabetes, so professional guidance is essential if you suspect you have this condition.
Tips for better sleep to help with weight loss
Lifestyle choices can significantly impact sleep and weight. Consider these tips:
- Maintain a schedule: Go to bed and wake up at the same time daily to stabilise your circadian rhythm.
- Establish a wind-down routine: Spend at least an hour before bed relaxing – reading, listening to music or meditating.
- Limit screen time: Blue light from phones and tablets affects melatonin production, making sleep harder. Avoid devices at least an hour before bed.
- Stop late meals: Finish eating at least two hours before sleep to allow your body to transition from digestion to rest.
- Optimise your environment: Keep your bedroom dark, quiet and cool for better sleep quality.
- Avoid caffeine and nicotine: Limit caffeine six hours before bed and nicotine one hour prior.
- Limit alcohol: One evening drink may be acceptable, but excess impairs sleep quality.
- Take a hot bath: A warm bath before bed can improve sleep onset and quality.
Creating a sleep-first weight loss plan
The right diet can improve sleep while supporting weight loss. The 1:1 Diet combines low-calorie meal plans, one-to-one diet support, tailored nutritional advice and all essential vitamins and minerals for optimal health – including better sleep.
Products are formulated with nutrients such as magnesium, iron and B vitamins to reduce tiredness and fatigue. A lower sugar intake helps stabilise blood sugar, which is linked to improved sleep quality.
Dedicated Consultants provide personalised support, helping dieters tackle stress-related sleep issues and weight gain.
Clinical evidence supports these benefits. One study of 195 adults on The 1:1 Diet found that after eight weeks, participants lost over two stone on average. Over the following year, those who normalised their sleep maintained weight loss, confirming the link between sleep and weight control. Exercise also improved sleep quality, while weight-loss medication only temporarily extended sleep duration.
Research shows The 1:1 Diet can improve sleep apnoea. In one study, 30 participants with severe sleep apnoea lost an average of 18.7 kg over nine weeks, and 26 out of 30 experienced significant improvement. In a control group not following the diet, only four improved while five worsened and 24 remained unchanged.
Read real success stories like Dewmi’s journey to see how sleep and diet together can transform lives.
Take control of your weight with better sleep
Sleep and weight loss are closely linked. Combining improved sleep with a structured diet like The 1:1 Diet maximises your results, helping you shed pounds while supporting overall health.
Discover a Consultant near you to start your journey: Get started