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How Long Does It Take to Lose Weight? – Healthline

Dec 21st, 2022

Whether you want to lose weight for a special occasion or simply improve your health, weight loss is a common goal.

To set realistic expectations, you may want to know what a healthy weight loss rate is.

This article explains the factors that affect how long it may take you to lose weight.

Weight loss occurs when you consistently consume fewer calories than you burn each day.

Conversely, weight gain happens when you consistently eat more calories than you burn.

Any food or beverage you consume that has calories counts toward your overall calorie intake.

That said, the number of calories you burn each day, which is known as energy or calorie expenditure, is a bit more complicated.

Calorie expenditure is composed of the following three major components (1):

If the number of calories you consume equals the number of calories you burn, you maintain your body weight.

If you want to lose weight, you must create a negative calorie balance by consuming fewer calories than you burn or burning more calories through increased activity.

Weight loss occurs when you consistently consume fewer calories than you burn each day.

Several factors affect the rate at which you lose weight. Many of them are out of your control.

Your fat-to-muscle ratio greatly affects your ability to lose weight.

Because women typically have a greater fat-to-muscle ratio than men, they have a 510% lower RMR than men of the same height (2).

This means that women generally burn 510% fewer calories than men at rest. Thus, men tend to lose weight quicker than women following a diet equal in calories.

For example, an 8-week study including over 2,000 participants on an 800-calorie diet found that men lost 16% more weight than women, with relative weight loss of 11.8% in men and 10.3% in women (3).

Yet, while men tended to lose weight quicker than women, the study didnt analyze gender-based differences in the ability to maintain weight loss.

One of the many bodily changes that occur with aging is alterations in body composition fat mass increases and muscle mass decreases.

This change, along with other factors like the declining calorie needs of your major organs, contributes to a lower RMR (4, 5).

In fact, adults over age 70 can have RMRs that are 2025% lower than those of younger adults (2, 6).

This decrease in RMR can make weight loss increasingly difficult with age.

Your initial body mass and composition may also affect how quickly you can expect to lose weight.

Its important to understand that different absolute weight losses (in pounds) can correspond to the same relative (%) weight loss in different individuals. Ultimately, weight loss is a complex process.

The National Institutes of Health (NIH) Body Weight Planner is a useful guide to how much you can lose based on your initial weight, age, sex, and how many calories you take in and expend (7).

Although a heavier person may lose double the amount of weight, a person with less weight may lose an equal percentage of their body weight (10/250 = 4% versus 5/125 = 4%).

For example, a person weighing 300 pounds (136 kg) may lose 10 pounds (4.5 kg) after reducing their daily intake by 1,000 calories and increasing physical activity for 2 weeks.

You must create a negative calorie balance to lose weight. The extent of this calorie deficit affects how quickly you lose weight.

For example, consuming 500 fewer calories per day for 8 weeks will likely result in greater weight loss than eating 200 fewer calories per day.

However, be sure not to make your calorie deficit too large.

Doing so would not only be unsustainable but also put you at risk for nutrient deficiencies. Whats more, it might make you more likely to lose weight in the form of muscle mass rather than fat mass.

Sleep tends to be an overlooked yet crucial component of weight loss.

Chronic sleep loss can significantly hinder weight loss and the speed at which you shed pounds.

Just one night of sleep deprivation has been shown to increase your desire for high-calorie, nutrient-poor foods, such as cookies, cakes, sugary beverages, and chips (8, 9).

One 2-week study randomized participants on a calorie-restricted diet to sleep either 5.5 or 8.5 hours each night.

Those who slept 5.5 hours lost 55% less body fat and 60% more lean body mass than those who slept 8.5 hours per night (10).

Consequently, chronic sleep deprivation is strongly linked to type 2 diabetes, obesity, heart disease, and certain cancers (11, 12, 13).

Several other factors can affect your weight loss rate, including:

Age, gender, and sleep are just a few of the many factors that affect weight loss. Others include some medical conditions, your genetics, and the use of certain medications.

With innumerable weight loss diets available all promising impressive and quick results it can be confusing to know which one is best.

Yet, though creators and proponents deem their programs superior to the rest, theres no single best weight loss diet (19, 20).

For example, low-carb diets like keto may help you lose more weight initially, but studies find no significant differences in weight loss in the long term (21, 22, 23).

What matters most is your ability to stick to a healthy, reduced-calorie eating pattern (24, 25).

However, following a very low calorie diet for long periods is difficult for many people and the reason why most diets fail (26).

To increase your chances of success, only moderately reduce your calorie intake, individualize your diet according to your preferences and health or work with a registered dietitian.

Combine diet with exercise, including both aerobic and resistance training, to maximize fat loss and prevent or minimize muscle loss (27).

By eliminating highly processed foods and incorporating more healthy, whole foods, such as vegetables, fruits, whole grains, healthy fats, and proteins, you can further promote weight loss and your overall health.

Adhering to a weight loss diet is difficult for most people. Regardless of your goals, choose a dietary pattern based on your individual preferences and health status.

While most people hope for fast, rapid weight loss, its important that you dont lose too much weight too quickly.

Rapid weight loss can increase your risk of gallstones, dehydration, and malnutrition (28).

Other side effects of rapid weight loss include (29, 30):

Though weight loss may occur faster at the start of a program, experts recommend a weight loss of 13 pounds (0.451.36 kg) per week, or about 1% of your body weight (31).

Also, keep in mind that weight loss is not a linear process. Some weeks you may lose more, while other weeks you may lose less or none at all (32, 33).

So dont be discouraged if your weight loss slows or plateaus for a few days.

Using a food diary, as well as weighing yourself regularly, may help you stay on track.

Research shows that people who employ self-monitoring techniques, such as recording your dietary intake and weight, are more successful at losing weight and keeping it off than those who dont (34).

Losing weight too quickly can lead to problems like gallstones, muscle loss, and extreme fatigue. Experts recommend a moderate weight loss of 13 pounds (0.451.36 kg) per week, or about 1% of your body weight.

Weight loss occurs when you eat fewer calories than you burn.

Many factors affect your weight loss rate, including your gender, age, starting weight, sleep, and the extent of your calorie deficit.

Aiming to lose 13 pounds (0.451.36 kg) per week is a safe and sustainable way to reach your goals.

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How Long Does It Take to Lose Weight? - Healthline

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