Make time for exercise. Exercising might actually make you gain a few pounds of muscle when you first start, but it's an essential component of any long-term, sustainable weight loss plan. Regardless of how busy you are, it is essential that you make time to exercise each day if you actually want to lose weight and keep it off. Even little things like walking instead of driving to the store can affect how quickly you lose weight.
This question is on so many minds: how can I lose belly fat...and fast? While there's no magic formula of food and exercise to reduce belly fat with the snap of your fingers, there are nutrition choices, exercises and lifestyle changes that can help. Here's your guide to understanding exactly what belly fat is and how you might be able to reduce it over time.
Besides being the preferred fuel for the brain and heart, we have recently recognized that BOHB also functions like a hormone that signals multiple changes in gene expression (aka ‘epi-genetic effects’). Among other effects, BOHB turns on the body’s innate defenses against oxidative stress and inflammation (Schimazu 2013, Youm 2014), and it also acts to reduce insulin resistance at its source (Newman 2014). This new information has the potential to be nothing short of revolutionary! From this perspective, the liver can make a ‘hormone’ from fat that protects us from oxidative stress, inflammation, diabetes, and probably Alzheimer’s disease and aging as well (Roberts, 2017). All we need do to accrue these benefits is restrict carbs to allow the keto-adaptation process to occur. But to date, none of these beneficial epigenetic effects seem to include pathways that might make body fat melt away.
So how does this work? A quick run-through: The first tip was to eat low carb. This is because a low-carb diet lowers your levels of the fat-storing hormone insulin, allowing your fat deposits to shrink and release their stored energy. This tends to cause you to want to consume fewer calories than you expend – without hunger – and lose weight. Several of the tips mentioned above are about fine-tuning your diet to better this effect.
Chronic stress may increase levels of stress hormones such as cortisol in your body. This can cause increased hunger and result in weight gain. If you’re looking to lose weight, you should review possible ways to decrease or better handle excessive stress in your life. Although this often demands substantial changes, even altering small things – such as posture – may immediately affect your stress hormone levels, and perhaps your weight.
“Stop focusing on calories and start focusing on the quality of the foods you eat. High-quality diet options are natural, whole, minimally processed foods, like vegetables, fruits, nuts or seeds that offer a lot more nutritional value in the form of vitamins, minerals, healthy fats and fiber. These foods help tame hunger naturally and nourish our cells at the deepest level so that we aren’t left with constant cravings. — Michelle Loy, MPH, MS, CSSD, Registered Dietitian Nutritionist and owner of Go Wellness in Orange County, California
One easy trick if you're a pasta fan is to swap out white pasta for the wonderfully named courgetti (spaghetti made from spiralizing courgette). You’ll hardly notice the difference when you’re eating it, but you’ll be fuller for longer despite consuming fewer calories. When you consume fewer calories, your body can go to your fat reserves for energy, rather than just burning off the food you’ve eaten.
Katie’s weight has been a challenge her entire life. But after having two boys, she reached an all-time high: 253 pounds. That was when she decided to make a change, but it didn’t happen right away. For the next three years, she dieted and bounced between losing and gaining 50 pounds. Her real weight loss journey began in 2009, when she used calorie counting and running to take off 125 pounds. Today, she writes about maintaining that loss, running, being a mother, and managing a bipolar diagnosis. Visit the blog.
About: Megan is a lifelong runner who exemplifies what’s it’s like to find happiness in fitness. Her blog is mainly a personal diary about her running, race trainings and occasional trim-ups, but it’s her integrity and honesty that makes you want to keep reading once you start. She’s a real person with real ups-and-downs, perfect for a person who is well on their way to their goal weight and a general healthy lifestyle, but sometimes takes a few steps back and struggles. Megan, like them, has downs, but her continuous determination is something you’re sure to admire.
Satisfying your sweet tooth doesn't require a refined sugar-packed snack. The key is retraining your taste buds to recognize naturally sweet foods, like fruit. "To curb my hankering for treats, I eat mangoes," says Tamyala Ezell, who lost 105 pounds by making over her eating habits and working out three times a week. "They have a natural sweetness that does the trick. Plus, they're low in calories and high in fiber." Another example? "I top berries, nectarines, and cherries with homemade whipped cream, nuts, and dark chocolate," says Goetke.
About: Caitlin’s approach to healthy living is three-pronged: mind, spirit and body. She believes that finding true health means finding balance in all three, and her mission with her blog is to take people along the way as she figures that out. She’s a self-taught yogi with a passion for natural, balanced food and fitness — all things she shares exponentially in her blog to help others figure it out too.
First of all thank you very much for your valuable comment. I am sure you do agree that the Mediterranean diet and Dash diet are not considered as ‘fad diets’ but they are among the healthiest diets to follow with many benefits besides weight loss. As far as the other 3 diets is concerned (17 day diet, slim-fast and dukan diet), they are included in the list because they are better than other commercial diets in many aspects and if followed for a SHORT period of time can generate results.
The main guiding principles of Nutrisystem are portion control, proper nutrition and daily exercise. By relying on foods with a low glycemic index (in other words, foods that release their sugars slowly and steadily, instead of rapidly and intensely), Nutrisystem meals provide a consistent amount of energy throughout the day. The prepackaged, portion-controlled meals eliminate guesswork, while their nutritional guides encourage you to incorporate fresh produce into your meals. Nutrisystem’s meals are rich in high-quality proteins to keep you feeling fuller for longer and incorporate healthy fats (like nuts) to ensure you get all the nutrients you need. Their website allows you to track your progress and set realistic goals for yourself as well as giving you a large list of ten-minute exercises to do three times a day to help you stay active to lose weight even faster.
Any weight loss that occurs because of these programs is almost always connected to a dramatic reduction in calories, not magical properties of the program itself. However, sudden and dramatic dietary changes can cause losses in muscle mass and general fatigue, as well as more serious complications such as disrupted gut bacteria, deficiencies in vital micronutrients, and even organ damage.
First, does being in nutritional ketosis necessarily cause weight loss? For individuals who have experienced fairly rapid weight loss with little effort, their answer is usually a resounding yes! But remember that this is typically based on one person’s experience (or one person and a few of his/her friends). This commonly happens in a person who is relatively insulin sensitive, so that when that individual gets to their new stable (‘maintenance’) weight, they probably did not need to remain in nutritional ketosis—i.e., they could eat a wider range of total daily carbs and still remain weight stable. So in that person’s experience, it looks like nutritional ketosis caused their weight loss and it stopped when they ate enough carbs to go out of nutritional ketosis. In scientific terms, we need to decide if this is a causal relationship, or just an association.
The goal of the workout was to promote food storage to muscle instead of fat – this is especially important during your cheat days. During my cheat day, I will look to do the air squats + tricep extensions even if I’m eating out. I didn’t go to the gym at all for this, instead, I just took a couple old 20lb dumbbells, a pair of 10lb dumbbells and a pull-up bar from home. If you don’t have a pull-up bar don’t buy one, simply exchange the exercise for a back row or seated back fly exercise. I also don’t own a weight bench so no need to spend your money on that. What I’ve learned since losing even more weight is that these workouts are pretty important if you want to lose weight fast. They aren’t necessary but they certainly do help shed some extra pounds by keeping the fat off, especially on your cheat day.
Arteries (are-te-rease): The blood vessels that carry oxygen-rich blood away from your heart for delivery to every part of your body. Arteries look like thin tubes or hoses. The walls are made of a tough outer layer, a middle layer of muscle and a smooth inner wall that helps blood flow easily. The muscle layer expands and contracts to help blood move.
I have been heavy my entire life, at my largest I was 275 lbs and a size 20. I hated how I looked and how I felt. I have tried every diet out there, South Beach, Weight Watchers, Atkins, sugar free, fat free, calorie counting, you name it I’ve tried it. I read all the weight loss blogs. Sometimes I would lose a little weight, but inevitably something happened, I gave up and gained it back plus more.
Kenlie’s inspiring weight loss journey is the foundation of her blog, All The Weigh. Kenlie has lost over 100 pounds, two different times. Although this time around she’s only a few pounds shy of reaching her lowest weight as an adult (284 pounds)—she has learned that loving and accepting yourself is the most important part of the journey. Her blog is a place where she shares her thoughts, feelings, and everything that has influenced her throughout her transformation to better health.
Just like your brain has pain sensors to tell you that the curling iron is hot, your brain has hunger sensors. Basically your brain is telling your stomach “we need nourishment” or in the case of the curling iron “hey, woman that’s hot stop touching it”. The only way to turn off hunger receptors is to feed your body the nourishment it needs to sustain itself… and yep you guessed it that means veggies! (7,8)
I have been following the slow-carb diet for nearly 3 weeks with no significant weight loss. I will admit I have made a few tweaks to fit my lifestyle. I go to the gym at 5:30am and do not have time or the desire to eat a big breakfast before going. So I normally make a whey protien shake with water and about 1/4 cup frozen berries (I know fruit is a no-no) when I get home from the gym at 7. I then eat breakfast – eggs, black beans and spinach at 10. Lunch is either a salad with beans or slice of deli turkey or chili. I have not eaten any grains, sweets etc… I do use milk in my coffee instead of heavy cream. Why is heavy cream a better choice? I do have a glass of red wine at night and an occasional serving of sugar free gelatin. I take a spin class 2-3 days a week and run 20 miles per week as I am training for a Ragnar Relay.
With our pantry seemingly empty and our refrigerator busting at the seams with all things healthy and natural, I started my weight loss journey. Although I will not completely lay out the guidelines from his book I will share several things I learned that will stick with me forever. One major aspect of weight loss and overall health that I still honestly think about every time I go grocery shopping is to shop the perimeter of the store. If you think about it, the center is filled with boxes and cans and bottles of “food” filled with sugar, unhealthy oils and preservatives. It’s a great concept to remember and keep me in line. I took meal ideas from his book and would eat the same exact thing every single day (especially for breakfast and lunch) for a week or two at a time. It sounds incredibly boring but it made grocery shopping and meal planning so much easier. I can honestly say that for most all of my weight loss, I did not count calories. I ate when I was hungry and did not crash diet what so ever. I think that is HUGE in creating a weight loss journey and to changing your lifestyle. I learned the simplest things from how much sugar is in spaghetti sauce and how to make my own to what to look for in the ingredient list of boxed goods when you do want a quick and easy snack.
Experts typically recommend reducing your daily intake by about 300-500 calories per day below "maintenance level," or the amount you need to stay at your current weight. This decrease in calories converts to about 1/2 pound to a pound of weight loss per week. Although you may feel like you can "do more," slow, steady progress is much healthier—and easier to keep up.
About: My Fat Friend Blog mixes two total opposites: Alex, the “fat friend” who is trying to lose weight and get fit. Sarah is the “not-fat friend,” the one who is really into fitness and healthy eating and who is on a mission to help Alex learn to love it the way she does. The blog is very, very new (just started in March), but so far, so good. The posts are entertaining, have fun photos and will have you laughing out loud.
Excellent question! I suppose you could look at it like this: you are less insulin sensitive in the luteal phase, so in order to prevent fat gain it is “more important” to burn sugar and fat at this time – so if weight loss is your goal, and if you do good, hard anaerobic workouts, then this will sharpen your insulin sensitivity as much as possible and help keep you lean via that mechanism. If, on the other hand, weight loss is not your goal but fitness and strength are, then you may wish to do aerobic work at this time (with higher blood sugar you can accomplish greater aerobic feats), and save the anaerobic work for the rest of your cycle. Does that make sense? At least, that is what I am guessing is happening here.
About: It may be tough to tell by looking at her photo (complete with a very toned tummy), but Hannah’s no stranger to gaining weight. She packed on about 50 pounds each time she became pregnant with her two kids until she eventually went from a size 4 to a size 12-14. The pregnancies also changed her body and made her unhappy with the way she looked. Ready for change, Hannah created a fitness and food plan for herself, stuck to it and noticed she slowly but surely lost weight and started to look more and more toned. Now she’s studying to be a personal trainer, and her blog is a place she shares all her fitness tips, nutrition ideas and motivation to help others lose weight too.
If you’re already enjoying and eating foods high in fat along with protein, you might want to consider going on the keto diet. It’s been proven to be more effective at weight loss than a low-fat diet, and you’ll likely have an easy time transitioning to it. (9) Among my weight loss tips, going keto is the diet that produces the quickest results alongside significant health changes.
"Protein is great for fat loss. It helps build and preserve lean muscle tissue and can increase the amount of calories you burn. It’s also a great source of energy that helps you feel fuller for longer, so you’re less tempted to snack. Good sources include chicken breast, tuna, eggs, milk and chickpeas. And if you’re finding it difficult to avoid snacks that are high in carbohydrates, try substituting them for protein shakes or bars. Remember also to opt for the lean sources of protein because some sources can be high in saturated fat."
Between his hilarious poetry, inspiring post-it notes, and top ten lists that make Letterman sound unoriginal, reading Jack Sh*T, Gettin' Fit can feel more like your daily dose of comedy than weight-loss advice. Of course you get that too, you're just laughing so hard you don't realize how good it is for you. Check out his post When Harry Met Salad to see what I mean.
Chronic migraines were what first inspired Amanda Tagge to start exercising. “I was hoping to find some relief from my headaches and working out did help but I realized that if I really wanted to feel better I needed to revamp my health habits overall and lose weight,” she says. The more she changed, the better her headaches got and she lost 70 pounds in the process which helped her feel even better. Focusing on all the ways her health was improving kept her going even when the scale wasn’t moving.
Listen up: Skipping meals will not make you lose weight faster. If a hectic day makes a sit-down meal impossible, stash an energy bar or a piece of fruit in your car or tote, keep snacks in your office desk drawer, and make a point of getting up to grab a nosh — anything that will keep you from going hungry! Going long periods of time without food does double-duty harm on our healthy eating efforts by both slowing down your metabolism, and priming you for another binge later in the day. (Think: You've skipped breakfast and lunch, so you're ready to takedown a whole turkey by dinner!) Make it your mission to eat three meals and two snacks every day, and don't wait longer than three to four hours without eating. Set a "snack alarm" on your phone if needed.
I am a registered dietitian and nutritionist. My focus is to promote whole food nutrition, so you will not find any weight-loss medicines or supplements in this diet plan. The only things you need to lose weight are healthy, fresh food from your local market. I own a nutrition clinic where I provide healthy eating and exercise counseling to families to help young children maximise their growth and health potential. I know all about the weight-loss pills on the market. Most of them are unhealthy and cause nausea, diarrhea, and other serious symptoms.
The credibility of your articles has really just changed dramatically for me. None of the aforementioned “diet plans” listed in this article have any type of longevity or sustenance to them, which means they’ll last you a week or two at the most. Which then brings me to your article about fat loss vs water weight vs muscle loss. High protein, low carbohydrate diets are NOTORIOUS for causing a nice muscle burn over a fat burn.
Nutrisystem is so accessible, you can even grab it at your local Walmart. There are a few different plans to choose from, but each of them has you eating 4 to 5 times a day — and every meal and snack is high-protein, high-fiber, and contains zero trans fat, MSG, or artificial preservatives. Those who use this diet are said to lose an average of 1 to 2 pounds per week.
I know you’ve heard this all before, I’m sure, but seriously my friend THANK YOU for this post it was amazing and made me feel Like 1. I’m not alone in this world of stress and eating and anxiety and 2. It’s a journey and I can do it !! Thank you! Ps I would love to know some of your tips and tricks in how you manage stress and anxiety, maybe another post
Too little sleep or too much sleep can throw your stress and regulatory hormones out of whack, and may lead to weight gain. A single night of sleep deprivation can increase levels of ghrelin (a hormone that promotes hunger), making you more likely to overeat the next day. Reduced sleep may also lead to fatigue during the day (duh) and less physical activity, which may be another reason why people who regularly don't get enough sleep tend to gain weight.
The sad truth is that conventional ideas – eat less, run more – do not work long term. Counting calories, exercising for hours every day and trying to ignore your hunger? That’s needless suffering and it wastes your time and precious willpower. It’s weight loss for masochists. Eventually almost everyone gives up. That’s why we have an obesity epidemic. Fortunately there’s a better way.
Brittany! Just catching up on your blog. What a beautiful post! Loved every word sweet friend. I couldn’t be more proud of you for sharing all of that. You are absolutely stunning, but what really shines is your honesty and kind heart. This was so inspiring and motivating for me because I need to loose a few pounds this summer and I get frustrated so easily! I’m a stress eater too. Can’t wait to hear some of your healthy meal/snack ideas! I hate to say I told you so about sharing this post.. but I told you so. 😉
Patty, it doesn’t matter if you have 10 pounds to lose or 100. You know when you need to make changes to get back to feeling better. I’m so glad you’re taking the action to make it happen! Diet-wise, definitely try to avoid sugar, alcohol, and refined carbs as much as possible (those are big contributors of belly fat!). Unfortunately, losing weight in one specific area isn’t something we really have control over, so it’s going to be tough to target your stomach. Sometimes it’s just genetics that decides where those extra pounds decide to cling. So, as far as exercise goes, the cardio you’ve been doing with your bike rides is great! And with strength training, try to target your big muscle groups to boost your metabolism to burn off that fat. This is a great article on burning stomach fat – https://www.bodybuilding.com/content/the-truth-how-to-burn-abdominal-fat.html . And I highly recommend HASfit workouts! https://hasfit.com/
Hi mi 16 years old and I’m scared to get on the scale to weigh myself because the last time I was 222lbs and that’s horrible I know that. I cry a lot because I just can’t seem to lose weight and I get called names based on my weight a lot. I’m really a girly girl and I hate going shopping now because of my weight. I really want to lose my stomach fat, lose thighs, arms,back, and everything else or at least tighten it up because I’m going to be a senior next year. And I doubt I’ll get asked to the prom If I look the way I look. So that’s my goal for the summer. I’ve been looking online for a while to find ways to lose weight I even considered pills and when I get like that (desperate) I even think about just ending all my problems permanently if you know what I mean.
Dieting to lose weight, it would appear, is about empowering yourself, being honest with yourself and listening to your body. I’m not a believer in dieting as such but in finding a way of eating for life that is a sensible ‘diet’. There’s a difference. My present lifestyle shows I need adjustments to what I did before. So I have to ask myself if I am really hungry or just bored and if that’s why I am looking longingly in the fridge. I need to tell myself to have a drink water and get back to what I was working on, reading, etc. (Not easy when working from home).
If you’ve been eating fast food for years, get real about your approach: You’re probably not going to stick to an organic, gluten-free, paleo overhaul for very long. "You want to change as little as possible to create calorie deficit," says Dr. Seltzer, who insists the best way to support sustainable weight loss is to incorporate small changes into existing habits. So instead of giving up your daily BLT bagels in favor of an egg-white wrap, try ordering your sandwich on a lighter English muffin. Or say you eat a snack bar every afternoon: Swap your 300-calorie bar for a 150-calorie alternative. "Your brain will feel the same way about it, so you won’t feel deprived," he says.
It’s time to focus on your lentil health. In one four-week Spanish study, researchers found that eating a calorie-restricted diet that includes four weekly servings of legumes aids weight loss more effectively than an equivalent diet that doesn’t include beans. Those who consumed the legume-rich diet also saw improvements in their “bad” LDL cholesterol levels and systolic blood-pressure. To reap the benefits at home, work lentils, chickpeas, peas and beans into your diet throughout the week.
Stephen Colbert may be on to something. UCLA Center for Human Nutrition researchers divided study participants into two groups, each of which were fed a nearly identical low-cal diet for 12-weeks. The only difference between the groups was what they were given to eat as an afternoon snack. One group ate 220-calories of pretzels while the other group munched on 240-calories worth of pistachios. Just four weeks into the study, the pistachio group had reduced their BMI by a point, while the pretzel-eating group stayed the same, and their cholesterol and triglyceride levels showed improvements as well.
Your body stores up fat for later, but if you eat a balanced amount of healthy fats your body will stop storing it because it knows you will be having it everyday. Kind of like that age old diet tip, don’t put yourself into starvation mode, it will make your body hold onto fat for later, same is true here. Feed your body healthy fats and it will release excess fat from your body.
Attend a weight loss camp. Sometimes sticking with an exercise routine and diet plan is too challenging. Old habits and daily routines will steer you back to your old foods and activities at every turn. To combat this, many people enroll in residential weight loss programs that remove them from their daily lives. Sometimes called fitness retreats, these programs come in dozens of different styles, and are available for youth, adults and seniors. You should always make sure before attending, that your weight loss camp of choice is equipped to safely handle your age and health specific needs.
So I am not going to lie. This is absolutely a post that I never in one million and one years thought I would share on my blog. What started as an interior design blog quickly became a “follow our journey” blog and now I just chat about anything and everything that I love or am going through or just feel like sharing. I’ll blame it on the fact that I get bored easily or maybe that there are only so many room reveals one can do each month. Whatever the case may be, I still never ever planned on sharing THIS. I mean who searches through bins and bins of old photo albums to hunt down the worst images taken of themselves in their entire life? Well that would be me. And then on my blogger girl’s trip several weeks ago, someone spotted the image on my driver’s license (yes it is forever old but who wants to wait in the DMV line to simply change their photo?!?) and so the weight loss conversation ensued. The story of how I once weighed about 100lbs more than I do today…
I am two weeks down. First week i didn’t complete six days and relapsed on my 4th day as long weekend came at my place. But this last week i manged to complete with saturday as my cheat day. I must confess that one is unable to eat much on cheat day as your body is tuned to specific timely meals. But i didnt loose as much as i would have liked. I just dropped 1.3 Kg. Maybe because i couldnt do any sort of exercise. Now my second week has started and i plan to stick to the diet. Lets see…
About: Besides Nadia’s beautiful smile, it’s her philosophy on life that really drew us to her blog. Yes, Nadia is passionate about all things fitness and healthy eating, but she’s even more passionate about spreading the message that perfection is impossible and the key is to love yourself for who you are. That’s the kind of heart Nadia puts into each and every one of her posts as she strives to help people find their own version of happiness.
Why our programs get you fast results - safely. Fad diets don't work. Often fad diets are referred to a yo-yo diets because your body weight goes up and down with each and every fad diet you try. You may take the weight off (sometimes with unpleasant side effects) but, you don't have the tools to keep it off for good so your weight goes back up. With Herbal Magic, you will lose weight quickly, safely (with no unpleasant side effects) and keep it off. Each Herbal Magic weight loss program combines real food, personal coaching, and natural health products. It is the combination of these important elements that gives you weight loss results, quickly and safely. There are three steps to help you lose weight and keep it off, for good: We'll give you the tools to achieve: Fast, healthy weight loss Keeping the weight off Your personal goals We will provide a customized weight loss solution that will provide fast, long-lasting results for you. Guaranteed! Related sites with real life stories: http://imgur.com/a/4kKNf"
About Blog Unbiased Reviews and Information on Weight Loss, Anti-aging, and Longevity Programs for Men & Women. Here you’ll find outtakes of our journeys and experience with the HCG Diet program. If you’re on, or considering, the HCG diet program take some time to read out stories. We’ve tread the path before you and have lots of tips and insights to make your ride smooth and successful.
Thank you so much for this. I really appreciate how honest you are! I read a lot of stories and the answer is something like “I cut out soda and started walking” and they don’t talk about the really hard work, food choices, portion control, maintenance, etc. I’m also a person who can’t just eat anything & over the course of my marriage have gained a lot of weight – there’s something about weirdly trying to “keep up” with my much taller/larger husband who has a completely different metabolism! We are about to move & I finally feel really motivated to make changes in my lifestyle. I also appreciate that you are honest about your skin removal – so many people aren’t!!
When you want something sweet, all those fat-free, sugar-free options seem like a smart choice for weight loss. But researchers at Cornell University found that overweight people who choose low-fat versions of snack foods rather than the regular kinds consume, on average, twice as many calories. "The terms 'fat-free' or 'sugar-free' can create a green light effect, triggering people to eat more," says dietitian Cynthia Sass, RD. But many fat-free foods have about the same number of calories (or more) as their full-fat counterparts.
Those trans fats on your menu are hiding out in plain sight and sabotaging your lean belly plans every time you eat them. If a food product says it contains partially hydrogenated oils, you’re eating trans fat, which can increase your risk of heart disease, high cholesterol, and obesity with every bite. In fact, research conducted at Wake Forest University reveals that monkeys whose diets contained eight percent trans fat upped their body fat by 7.2 percent over a six-year study, while those who ate monounsaturated fat gained just a fraction of that amount. Instead of letting harmful trans fat take up space on your menu, fill up with the 20 Healthy Fats to Make You Thin.
This popular plan recently underwent a rebranding to create a more balanced program, changing its four-phase approach with the help of a science advisory board. The Atkins Diet is still low-carb, but you won't be chowing down on steak and eggs all the time to promote weight loss. Lean protein is still key, but there's more of a spotlight on fiber, fruit, vegetables, and healthy fats.
Everyone is different. How quickly you burn calories when you are not physically active can be very different from other people based on your specific genes, biology, and past. While scientists know that there are 3,500 calories in one pound, simply eating 500 fewer calories every day for a week (or 3,500 fewer calories in a week) does not always end in losing exactly one pound.