Why do you lose water weight when you first start dieting
John Thompson
Updated on April 15, 2026
The reason you can lose 10 or more pounds of weight in the first week of a diet – especially a low carb one – is because you’re burning through your body’s glycogen stores and not replenishing them.
Why do we lose water weight when dieting?
For example, going on a low carb diet, or cutting your carbs way back, triggers the loss of glycogen and the water stored with it, and if extreme, can also be dehydrating. Just two cups (16 oz) of water weigh one pound, so shedding fluid fast can result in weighing a lot less on the scale.
How much water weight do you lose when you first start working out?
You will start to lose that initial water weight gain (of roughly one to three pounds) a few weeks or a month after starting an exercise program, he says.
When you first start dieting do you lose water weight?
02/4Water weight and fat When you initially start losing weight, most of the initial kilos lost are in the form of water. When you restrict calories and burn off extra calories by working out, your body turns to glycogen for energy.Does losing water weight make you skinnier?
How to Reduce Water Retention. If your body is retaining excess water, getting rid of it can help reduce bloating and may even make you look a little slimmer, although it may not make you look 10 pounds thinner instantly.
Is it normal to not lose weight in the first week?
It is incredibly common for the scale not to budge for a few days (or weeks) at a time. This does not mean that you are not losing fat. Body weight tends to fluctuate by a few pounds.
How do I know I'm losing fat and not water weight?
How do you know if you’ve just lost water weight, or actual fat? When it’s probably water weight: If you’ve gained anywhere from around one to five pounds overnight. If your body fat percentage has decreased, but your weight has increased.
How do I know if I'm losing fat?
- You’re not hungry all the time. …
- Your sense of well-being improves. …
- Your clothes fit differently. …
- You’re noticing some muscle definition. …
- Your body measurements are changing. …
- Your chronic pain improves. …
- You’re going to the bathroom more — or less — frequently. …
- Your blood pressure is coming down.
How do you know if it's water weight?
If you press on your skin and an indentation stays there for a couple of seconds, that’s a sign you have water weight. One way to check if you’re retaining water is to press on swollen skin. If there’s an indention that stays for a little while, that’s a sign that you could be retaining water.
How do you get rid of water weight fast?- Drink more water. It might be a little difficult to believe but drinking more water can actually help you shed water weight. …
- Reduce intake of salt. Too much salt or sodium in your diet may be contributing to water retention. …
- Consume fewer carbs. …
- Exercise.
How long does it take to see results from working out 5 days a week?
Significant weight loss and muscle gains will take approximately eight weeks to see, however, even though you’re not seeing muscle definition, the benefits going on in your body and mind are considerable. “Your clothes will fit better, your posture will be better and you’ll walk taller,” Sharp says.
Why am I not losing weight despite working out and dieting?
One of the main reasons why burning calories through exercise may still not result in weight loss is due to overexertion, or inflammation of your body. If you exercise too hard on a daily basis, there is an excess of inflammation in your body. All the added up inflammation makes you gain more weight than lose.
How long does it take for water retention to go away?
The length of time that it takes to lose water weight depends on how much water you’re retaining, the cause of the water weight gain, and the action taken to lose it. If you have one high-sodium meal and then return to normal, healthy dietary habits, you’ll likely return to your normal weight in 1-2 days.
Is losing 5 lbs noticeable?
Even after losing just a few pounds, you’ll start to see positive changes in your body. … And if you lose more than five pounds, you’ll rack up the health benefits and see even more noticeable differences. Check out the 15 Underrated Weight Loss Tips That Actually Work to keep your momentum going!
What is the whoosh effect?
Keto dieters say the fat on their body feels jiggly or soft to the touch. The concept of the whoosh effect is if you stay on the diet long enough, your cells start to release all the water and fat they’ve built up. When this process begins, this is called the “whoosh” effect.
What's the whoosh effect?
According to some social media sites and blogs, the whoosh effect is a term that describes the noticeable weight loss that occurs when following a specific diet — particularly the keto diet. The idea behind it is that when a person burns fat, the fat cells lose fat but fill up with water.
What are the stages of losing weight?
- Phase -1 – GLYCOGEN DEPLETION. Glycogen Depletion: …
- Phase -2 – FAT LOSS. This is the sweet spot for healthy weight loss. …
- Phase -3 – PLATEAU. …
- Phase -4 – METABOLIC RECOVERY. …
- All the Phases of Weight Management:
What does 1 gallon of water weigh?
One US liquid gallon of fresh water weighs roughly 8.34 pounds (lb) or 3.785 kilograms (kg) at room temperature.
What causes water weight?
Plane flights, hormone changes, and too much salt can all cause your body to retain excess water. Your body is made up mainly of water. When your hydration level is not balanced, your body tends to hang on to that water. Usually, water retention may cause you to feel heavier than normal, and less nimble or active.
How long does it take for you to notice weight loss?
The first stage of weight loss is when you tend to lose the most weight and begin to notice changes in your appearance and how your clothes fit. It usually happens within the first 4–6 weeks ( 1 ).
How Does drinking water help you lose water weight?
Drinking water could help reduce your overall liquid calorie intake. Because water contains no calories, filling your glass with H2O instead of higher calorie alternatives such as juice, soda, or sweetened tea or coffee can reduce your overall liquid calorie intake.
Why is my weight stuck even after exercise and diet?
So as you lose weight, your metabolism declines, causing you to burn fewer calories than you did at your heavier weight. 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.
Should you weigh yourself after drinking water?
When your weekly weigh-in rolls around, don’t hop on the scale after drinking a bottle of water or eating a meal. For the most accurate weight, weigh yourself first thing in the morning.
Where does water weight go?
Extra water is typically stored all over your body in the tissue or between blood vessels, and tends to pool in the extremities (fingers, toes and lower legs).
How many pounds of water weight can you lose?
Weight decreases as a change in muscle, fat and water. Fat mass doesn’t change quickly, but you can lose as much as five pounds of water in a day. The average 24-hour urine loss is about 1.8-4.4 pounds because water is heavy. By contrast, it’s virtually impossible to burn off a pound of fat in a day.
Which body part will lose fat first?
Mostly, losing weight is an internal process. You will first lose hard fat that surrounds your organs like liver, kidneys and then you will start to lose soft fat like waistline and thigh fat. The fat loss from around the organs makes you leaner and stronger.
Do you poop out fat?
Turns out, most of it is exhaled. In a new study, scientists explain the fate of fat in a human body, and through precise calculations, debunk some common misconceptions. Fat doesn’t simply “turn into” energy or heat, and it doesn’t break into smaller parts and get excreted, the researchers say.
Do you pee more when losing weight?
You will lose a lot of water weight. The storage form of sugar (glycogen) needs three molecules of water for every molecule of glycogen, she said, and when your body starts to use up the stored water, you will urinate more causing your total body weight to go down.
How can I lose a pound of water weight in a day?
- Reduce sodium (salt) intake. Share on Pinterest Water weight may feel uncomfortable and cause bloating or puffiness in the body. …
- Drink more water. While counterintuitive, drinking water can actually reduce water weight. …
- Reduce carbohydrate intake. …
- Supplements. …
- Exercise. …
- Water pills.
How much water weight can you lose overnight?
Overnight, you might observe that you lose between one to three pounds. This weight loss could be due to the water you lose through sweating and urination; and carbon loss.
How much water is too much in a day?
Water needs vary based on numerous factors. As drinking too much water can disrupt your body’s electrolyte balance and lead to hyponatremia, 3 liters (100 ounces) may be too much for some people.