Lack of sleep primarily causes weight gain, not loss, by disrupting hormones that control appetite (increasing hunger hormone ghrelin, decreasing fullness hormone leptin), raising the stress hormone cortisol, slowing metabolism, impairing decision-making for food choices, and increasing cravings for high-calorie foods, leading to more calorie intake and fat storage, especially visceral fat.
Yes, sleeping well helps in weight loss by regulating appetite hormones, boosting metabolism, and improving your ability to make healthier choices. Poor sleep disrupts hormones that control hunger and fullness, leading to increased cravings for high-calorie foods and potentially causing your body to store more fat.
Increased energy expenditure: In some cases, insomnia can lead to involuntary movement or fidgeting throughout the night, burning extra calories. Stress on the body: Chronic sleep deprivation can put stress on the body, potentially causing unintentional weight loss due to reduced muscle mass or metabolic changes.
Getting enough sleep is essential for good health, and it can also play a role in weight loss. The recommended amount of sleep for weight loss is 7-9 hours per night.
The 3-3-3 rule for weight loss is a simple, habit-based method focusing on three key areas: 3 balanced meals a day, 3 bottles (or ~1.5L) of water by 3 PM, and 3 hours of physical activity per week, aiming for consistency over complex diets. It simplifies fat loss by establishing rhythm through consistent eating, adequate hydration to support metabolism, and regular movement, promoting sustainable health without intense calorie counting or restrictive rules, says Five Diamond Fitness and Wellness, Joon Medical Wellness & Aesthetics, and EatingWell.
Your most consistent and "true" weight is generally in the morning, after using the bathroom and before eating or drinking anything. This provides the most accurate baseline because your body has processed the previous day's food and fluids overnight, resulting in less fluctuation from digestion, water intake, and daily activities. Weighing at the same time, in the same minimal clothing, and under consistent conditions (like in the morning) helps track trends better than weighing at night or randomly.
The main thing that is changing overnight is the amount of water in your system. It's amazing how much water weighs! A gallon of water weighs 8 pounds, and a pint of water (16 ounces) weighs 1 pound (in metric, 1 liter of water weighs 1 kilogram).
Sleep deficiency is linked to many chronic health problems, including heart disease, kidney disease, high blood pressure, diabetes, stroke, obesity, and depression. Sleep deficiency is also linked to a higher chance of injury in adults, teens, and children.
Being in a calorie deficit and losing weight can lead to hormonal changes, like a decrease in leptin (the satiety or fullness hormone) and an increase in cortisol (the main stress hormone). These hormonal changes might impact your appetite, metabolism, and sleep, which can lead to fatigue.
Your slower metabolism will slow your weight loss, even if you eat the same number of calories that helped you lose weight. When the calories you burn equal the calories you eat, you reach a plateau. To lose more weight, you need to either increase your physical activity or decrease the calories you eat.
Leptin levels typically rise during sleep, so if you aren't getting enough sleep, your leptin levels decrease, so you feel hungrier and are, therefore, likelier to eat excessively and gain weight. Likewise, sleep disruptions of any kind can cause an increase in ghrelin, Dr. Wojeck says.
What are signs of sleep deprivation?
While every organ in the body is affected by poor sleep, the brain takes the biggest hit, showing signs of dysfunction faster than any other system. Over time, the heart, liver, and immune system also begin to show stress, which can increase your risk of chronic illness.
Stick to a sleep schedule
Go to bed and get up at the same time every day, including weekends. Being consistent reinforces your body's sleep-wake cycle. If you don't fall asleep within about 20 minutes of going to bed, leave your bedroom and do something relaxing.
Adele's significant weight loss wasn't from a quick fix but a two-year journey combining intense strength training, Pilates, hiking, boxing, and cardio, alongside major lifestyle changes focused on managing anxiety, not restrictive diets like the Sirtfood Diet, with workouts happening multiple times daily for mental and physical strength. Her routine included morning weights, afternoon hikes or boxing, and evening cardio, emphasizing getting stronger, which naturally led to fat loss and improved well-being.
Some causes of unintentional weight loss include:
If you aren't drinking anything during the night and empty your bladder before weighing yourself, your weight could easily be up to half a kilogram lighter than it was before you went to sleep. As with the case of excessive sweating at night, this is weight that will return as soon as you rehydrate.
If you're weighing yourself weekly, research shows that we're generally at our heaviest on a Sunday night and at our lightest on a Friday morning, so weighing in before breakfast on a Wednesday can give us the most accurate reading of our current weight [6].
Strictly speaking, body weight is the measurement of mass without items located on the person. Practically though, body weight may be measured with clothes on, but without shoes or heavy accessories such as mobile phones and wallets, and using manual or digital weighing scales.
In some people, particularly those who have been dieting or fasting, a meal that is high in carbohydrates, such as pasta or rice, can be stored as glycogen. Glycogen is stored with water, which causes an individual to gain water weight very quickly – as much as 2 pounds overnight.
The 2-2-2 weight loss method is a simple strategy focusing on 2 big bottles of water, 2 servings of fruits/veggies, and 2 daily walks, promoting hydration, nutrient intake, and activity to kickstart weight loss, energy, and better sleep, acting as a foundation for healthier habits rather than a complete diet plan. It's easy to follow and encourages movement and nutrient-dense foods but doesn't cover total calorie intake or macronutrients, requiring it to be complemented with a holistic plan for sustainable results.
While overnight weight gain is scary, it is quite common and can happen to anyone. It's absolutely possible to gain one to two kgs overnight! But relax, it's not fat and it's totally temporary. It can be as simple as being bloated, lack of sleep or just stress.
You don't have to stress too much about the occasional overnight weight loss. It's normal for people who've lost water or glycogen to experience it—it's not a sign that you're losing fat rapidly.
This is sometimes described as a period of 'quiet wakefulness'. But is taking a quick rest - closing your eyes, putting your feet up and clearing your mind for a couple of minutes - as beneficial as getting some sleep? The concise answer is 'no'.