Obesity & Weight Management

Metabolism and Weight Loss: How You Burn Calories

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by Dr. W. Rizvi

27 Mar 2025

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If your body is not burning calories quickly enough, does that mean weight gain is beyond your control? Not necessarily. While metabolism plays a role in how many calories you burn, it is not the primary factor behind weight gain for most people. Many weight loss strategies highlight metabolism’s importance, but other lifestyle choices have a greater impact. The real issue is how much you eat versus how much you burn.

Metabolism and Weight Loss: How You Burn Calories

While metabolism plays a role in calorie expenditure, your daily habits, like diet, activity levels, and even sleep, significantly impact your weight over time. That doesn’t mean metabolism doesn’t matter. The way your body processes energy depends on your daily habits. Staying active, building strength, and eating nutritious foods can keep your metabolism working efficiently. Knowing how to speed up your metabolism helps you make more intelligent choices for your health.  

How Your Body Turns Food into Energy

Metabolism is the process your body uses to turn food into energy. Whether it contains carbohydrates, fats, or proteins, every meal is broken down to fuel essential functions. Even when resting, your body keeps your heart beating, lungs breathing, and organs functioning. This ongoing energy use happens all the time, even while you sleep.

Your basal metabolic rate (BMR) is the number of calories your body burns while at rest. Some people naturally burn more calories than others, especially while they are at rest. However, having a slower metabolism does not automatically lead to weight gain. Many factors influence how your body uses energy, and understanding them can help you make better choices for managing your health.

Metabolism and Weight Loss: How You Burn Calories Your basal metabolic rate (BMR) is the number of calories your body burns while at rest. Some people naturally burn more calories than others, especially while they are at rest. However, having a slower metabolism does not automatically lead to weight gain. Many factors influence how your body uses energy, and understanding them can help you make better choices for managing your health.

Several essential factors affect BMR; for instance, muscle plays a key role in calorie burning since it requires more energy than fat, even when you are inactive. The more muscle you build, the more calories your body naturally burns throughout the day. Strength training and regular exercise can help increase muscle mass and improve metabolism for weight loss. Body size also matters since larger bodies need more energy to perform essential functions. Age is another factor because metabolism slows down over time due to natural muscle loss. Staying active and eating enough protein can help slow this process. Gender also plays a role, as men usually burn more calories at rest than women because they have a higher muscle mass percentage.

Beyond BMR, your body also burns energy through digestion and movement. Around ten percent of your daily calorie burn comes from digesting and processing food, a process known as the thermic effect of food. Choosing metabolism-boosting foods, such as lean proteins, whole grains, and spicy foods, can slightly increase the calories your body burns during digestion. The rest of the calories your body burns come from a movement that includes everyday actions like walking, standing, or even subtle movements like fidgeting. Walking, stretching, and even small movements like fidgeting can help increase metabolism for weight loss by keeping the body active throughout the day.

Your body constantly uses energy, and two significant factors in calorie burning are digestion and movement. When you eat, your body breaks food down into nutrients to fuel different functions. This process, known as the thermic effect of food, requires energy, meaning your body burns some calories simply by digesting. Usually, digestion accounts for about ten percent of the total calories your body uses daily. Choosing nutrient-dense foods can help support metabolism for weight loss by keeping the body’s energy expenditure steady even at rest.

While digestion contributes to calorie burning, physical activity plays a much more significant role. The body burns energy during structured workouts and routine movements like running, swimming, cleaning, or walking. Together, digestion and movement determine how efficiently the body burns calories. A person who eats nutrient-dense foods that require more energy to digest and stays active throughout the day will naturally have a higher calorie burn. If someone mainly consumes processed foods and has an inactive lifestyle, their body will likely burn fewer calories. Making mindful choices about nutrition and daily movement can elevate the metabolic process, allowing the body to burn fat more efficiently while maintaining a stable energy level.

The Formula to Weight Loss

Burn More Calories and Don’t Consume Too Much

If you want to lose weight, follow a simple formula, i.e., burn more calories than you ingest. Your body needs a daily calorie count to maintain its optimal function. However, when you consume less, the body uses stored fat for energy, a process known as calorie deficit. This calorie deficit allows you to lose weight gradually.  

An average calorie deficit of up to 700 calories daily can reduce 2 pounds weekly. However, cutting too much of your calorie count has more disadvantages; for instance, it slows your metabolism and leaves you feeling drained. Also, it causes muscle loss, which isn’t suitable for your body. Therefore, instead of crash diets, eat nutritious foods to stay active and energetic throughout the day. This way, it’s beneficial for the body to lose weight healthily.  

How daily movements and dietary habits shape metabolism  

How you move and the food you eat majorly affect how efficiently your body burns energy. Regular exercise is one of the best ways to support metabolism. Activities like running, cycling, swimming, and more help burn calories, while strength training builds muscle. The more muscles you have, the more calories your body burns naturally. But it’s not just training. Daily movements are also important. Going instead of driving, working, or sitting at your side will contribute to the energy your body consumes. These small things can cause noticeable differences in calorie burns. Whole foods, high in protein and fiber, can help support digestion. Proteins require more energy to disintegrate, but fibers help them maintain longer.

On the other hand, too much processed food and sugar can lead to obesity and fat storage. A balanced diet of lean protein, complex carbohydrates, and healthy fats helps your body use energy more efficiently. Stay active all day and decide on intelligent foods; they will naturally help you burn calories more effectively and make it easier to maintain a healthy weight. A wealth of protein options such as eggs, fish, chicken, and beans can help maintain muscle mass and, at the same time, increase the body’s energy expenditure.  

Go for green tea and coffee as well; they are good to consider for temporarily accelerating the metabolic process. Also, take chili peppers, including capsaicin, which can quickly improve the burning of calories. Whole grain products and fiber-packed foods last longer, but this also helps you burn more calories. Even drinking cold water can warm your body and contribute to a slight increase in energy expenditure. These foods can play a role in increasing metabolism, but their effectiveness is low. However, the mentioned food list can’t lead to heavy weight loss alone. Instead, they can be the same if they are coupled with regular exercise and the proper diet. 

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“Crash dieting is one of the worst things you can do for your metabolism. Starving your body may cause initial weight loss, but it also signals your metabolism to slow down and conserve energy. Instead of extreme dieting, the goal should be to create a slight calorie deficit while maintaining muscle through resistance training. A well-functioning metabolism is the secret to sustainable fat loss.”

Dr. Jason Fung (Author of ‘The Obesity Code’)

How Building Muscle Boosts Your Metabolism

Building muscle is one of the best things you can do if you’re looking for a natural way to keep your metabolism running efficiently. Strength training exercises like weightlifting help develop muscle tissue. Therefore, it helps burn more calories than fat, even when sitting around. The more muscle you have, the more energy your body needs, making it easier to maintain a healthy weight.

The importance of daily movements  

There is no need to spend long hours at the gym to improve metabolism. Simple movements like walking, cooking, standing, and tasks contribute to energy consumption. These types of movements increase calorie burn without the need for structured training. Small changes in daily habits can lead to meaningful improvements. If you go more often, taking the stairs instead of the elevator, for instance, can make a difference. These tasks do not require much effort but can have lasting effects on metabolism.  

Final thoughts

Eating nutrient-rich foods, doing regular strength training, staying active all day long, and maintaining a balanced lifestyle help your body burn calories more efficiently. Sustainable decisions lead to improved weight management and overall improvements in health and well-being without taking extreme measures.  

Contact your Endocrinologist today, Dr. W. Rizvi at R-endocrinology, to learn more about how age affects your metabolism.

How Age Affects Your Metabolism: What You Need to Know

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Disclaimer

*Please note that the information provided in the blogs and articles is intended for general informational purposes only and should not be considered medical advice. We strive to bring you the latest information about the endocrine world; however, we encourage you to seek individual medical advice and treatment options during your consultation with a qualified healthcare professional. *