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How does your body use calories while you sleep?

May 31, 2023 | Written by SleepyCat Team

Have you ever wondered what happens to your body when you are asleep? Do you picture yourself as a dormant entity, with all bodily functions shut down for the night? Well, think again! While you are snoozing, your body is still hard at work, burning calories and carrying out various essential functions. Yes, you read that right – even when you’re catching some Z’s, your body is a busy bee, using up energy to keep you alive and kicking. So, let’s delve into the fascinating world of sleep and discover how your body uses calories while you rest. Get ready to be amazed!


Fascinating link between REM and Calories 

During REM (Rapid Eye Movement) sleep, our bodies may not be moving much, but our brains are highly active. This is the stage of sleep where we typically experience vivid dreams. Interestingly, this brain activity during REM sleep can actually burn calories. Studies have shown that during REM sleep, the brain’s metabolic rate increases. This means that it requires more energy to function during this stage of sleep than during other stages. Specifically, the brain uses glucose as its primary source of energy, and during REM sleep, the brain’s glucose metabolism increases. In fact, research has suggested that the brain’s energy consumption during REM sleep can be just as high as when we are awake and performing mental tasks. This increased energy consumption translates into burning calories.


Basic Body Functions Never Stop Operating

When fast asleep, your body’s basic functions continue ensuring your survival without any conscious effort. This resting state is known as the Basal Metabolic Rate (BMR) which is responsible for maintaining vital processes such as breathing, blood circulation and regulating body temperature.


The Fat-Burning Dream

As we explore the hidden secrets of sleep, prepare to be captivated by the phenomenon of fat burning. During restful slumber, our bodies tap into fat stores as a source of energy. By entering into a state of  deep sleep, the body’s hormonal balance shifts, encouraging the breakdown of stored fat and thus increasing calorie expenditure. We have a secret ally to enhance your REM sleep experience—the SleepyCat Weighted Blanket. Its gentle pressure envelopes you, encouraging a deeper and more restful sleep, further optimizing your calorie-burning potential.


The Magic of Temperature Regulation

Sleep acts as a regulator, orchestrating the delicate balance of body temperature. As you sleep, your body strives to maintain a steady core temperature. This process involves energy expenditure as the body works to cool down or warm up, thereby contributing to additional calories burning during your nighttime journey. SleepyCat is your perfect companion to keep you cool during the night for a restful sleep. SleepyCat Ultima Mattress is a magical mattress that ensures to keep your body temperature 4°cooler and enhances your sleep experience.


Hormonal Regulation

While sleeping your body continues to repair and rebuild itself . Growth hormone secretion peaks during deep sleep, promoting tissue repair and muscle growth. Two hormones, in particular, deserve attention: leptin and ghrelin. Leptin regulates appetite and signals fullness, while ghrelin stimulates hunger. Lack of sleep disrupts the delicate balance between these hormones, leading to increased appetite and potential weight gain. Adequate sleep helps regulate these hormones and can contribute to maintaining a healthy weight. Here’s where SleepyCat enters the picture, creating an atmosphere of unparalleled comfort and relaxation. Imagine drifting off to sleep on a luxurious SleepyCat mattress, designed to cradle your body in heavenly comfort. The thought alone is enough to transport you to a realm of blissful dreams.



As we journeyed through the intricate pathways of slumber, we unveiled the astonishing truth about how your body becomes a calorie-burning powerhouse in the realm of dreams. From cellular restoration to metabolic wizardry, sleep proves to be an enchanting phenomenon that holds the key to your health and well-being. With SleepyCat’s cutting-edge technology, you’ll indulge in the perfect balance of comfort and support, ensuring that your slumber is nothing short of extraordinary. Embrace a magical realm of rest, where each night becomes a gateway to a leaner, fitter, and healthier you. 

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