How many calories does it take to lose one pound?
346886
Theoretically, about 3500 calories equals one pound. This means that you'd have to take in 3500 fewer calories than you need, over a period of time, to lose one pound. Keep in mind, this is in theory; what happens in the real world can be very different.\n\nOften, as we eat less, our bodies expend calories at a slower rate. Perhaps this occurs to ensure our survival, or just to defend a comfortable body weight. In any event, this slowdown is a real phenomenon, and has been proven in many laboratory studies — it's called diet induced adaptive thermogenesis. Most everyday people simply call it a decrease in metabolism. If your calorie requirement falls, it's increasingly difficult to take in few enough calories to lose weight. This can be quite a frustration and challenge to the person trying to shed some pounds.\n\nSo, while it's nice to have an equation that works in the lab, the 3500-calorie question is elusive to many of us. Unfortunately, our bodies don't work like a balance sheet or checkbook — what goes in and comes out doesn't always calculate. If it were that simple, the diet industry wouldn't be worth the billions of dollars that's being spent annually by folks in search of permanent weight loss.
1147313
To lose one pound, you have to burn 3,500 calories. Sound tough? Not if you break it down. To lose a pound a week, do an hour each day of any activity that burns an extra 500 calories.\n\nThe number of calories you'll burn during exercise is affected by your body weight, the intensity of your workout, your conditioning level, and metabolism, so burn rates are only an estimate. But here are ten activities that blast about 500 calories per hour, based on the weight of a 130-pound woman.\n    *\n\n      Rowing (vigorous effort): 502\n    *\n\n      Running 5.2 mph (11.5 minute mile): 531\n    *\n\n      Ice skating 9 mph: 531\n    *\n\n      Kickboxing: 590\n    *\n\n      Rock climbing (ascending): 649\n    *\n\n      Cross-country skiing (vigorous effort): 531\n    *\n\n      Swimming laps freestyle (vigorous effort): 590\n    *\n\n      Bicycling 14 - 15.9 mph (vigorous effort): 590\n    *\n\n      Walking up stairs: 472\n    *\n\n      Running up stairs: 885
909952
It all depends on your weight and the calories your body needs to function.  Remember that 1 pound = 3500 calories.  So if your only taking in 1000 calories a day and exercising (may I suggest maybe running or aerobics rather than jumping rope) it should only take a month or so.
1069058
The nutrition books are correct-- 3500 calories per pound of fat is not an absolute amount, but it's very close. However, your math is correct, too. Here is the story. \n\nWhen we burn fat, or other nutrients, heat is produced, which is measured in calories. As you note, each gram of fat generates 9 calories, and 454 grams equals one pound. But a pound of fat is not all fat. It's about 10% water. All of our body tissues--fat, muscle, bone, skin--contain some water. And water has zero calories.
200809
I see that number, "3500 calories in 1 lb of fat" in several sources, but I am not sure whether that is calories or Calories.  Most people are sloppy about the distinction, so I am guessing they really mean there are 3,500,000 calories per pound of fat.\n\n1 calorie = 4.184 Joules.\n\n60 minutes in an hour, 60 seconds in a minute.
114961
In general, you have to have a calorie deficit of 3500 calories to lose a \npound of weight.  This deficit can be produced by eating fewer calories, by \nusing more calories (being more active), or a combination of the two.  \nCertainly, the easiest way to do this is by eating about 250 calories less \na day and exercising about 250 calories more a day to lose about 1 pound a \nweek.  Given that it takes about 3500 calories to lose a pound of weight \nand that the average calorie need for most of us is about 2000 calories a \nday, it stands to reason that losing more than a couple of pounds a week is \nmathematically impossible.
298915
There is no healthy way to "lose weight fast" as many diet products claim to do.  No fad diet, pill, or product can do the work for you.  The best way is to follow a sensible, lower-calorie diet and exercise plan.\n\nIt takes 3500 calories lost to lose 1 pound of fat.  If you create a deficit of 500 calories per day, you will lose 1 lb per week.  This can be accomlished through following a meal plan and exercise regimen.  You should do cardiovascular exercise (jogging, dancing, etc.) as well as weight training (free weights, lunges, crunches, etc.) to both burn calories and increase your metabolism.\n\nI use SparkPeople.com as a way to track my food and exercise, and they have great message boards where you can get answers from experts and people with more experience.\n\nIf you sign up for it, my username is lolitaeyes!
350608
there are 3500 calories in one pound of fat there are 2.2 pounds per kilo that means there are 7700 calories in one kilo of fat
609341
3500 calories equals about 1 lb.\n\nSo you'll need to consume 3500 more calories on a weekly basis.
210122
There is no way to reduce fat in a certain area of the body (called spot reduction). To lose weight you need to burn more calories than you burn. \n\nTo lose 1lb you need to burn 3500 calories per week. That means 250 calories a day through exercise and 250 calories a day reduction in food intake. \n\nYou can find out how many calories you need to maintain your weight by using the BMR formula at www.caloriesperhour.com. Once you find out your BMR (basal metabolic rate) you can figure reduce that by 500 - 1000 calories per day to burn 1-2 pounds safely in a weeks period. \n\nI recommend strength training to go with any regular exercise program so that you also reduce INCHES which can show a flatter belly, tighter abs, and tighter thighs and butt.\n\nBest of luck to you!
410727
Technically, you lose a pound after burning off 3,500 calories. At the rate you are suggesting, you would have burnt 400 more calories a day than you put into your body. You would *technically* lose a pound every 8.75 days. I don't know how much you weigh so I can't tell you how many calories you need to eat/not eat to lose weight. Starving yourself and working out like crazy isn't a healthy way to lose weight because eventually your body will go into "feast or famine" mode and you will stop losing weight to conserve what you do have left. Our bodies are great that way. You can lose a lot of weight at first but it isn't the kind of weight that will stay off (mostly water weight and muscle weight) once you start exercising and eating regularly. You can't starve yourself forever. Eat a healthy, balanced diet and it should fall into place for you.\n\nThe best way to lose weight is to gradually "trick" your body into getting by on less. If you stay with 1,200 calories a day, and you need to eat 2,000 to maintain your current weight, then that is 800 calories that you are burning daily, just by eating less. Add some moderate exercize that burns 300-500 calories a day and you will have burnt about 1,300 calories, just by living and being healthy. You should lose about a pound or two a week on this schedule, doing it sensibly and without starvation.\n\nRemember also that heavy exercise increases muscle mass, and that muscle mass adds poundage to you. That's good. You burn more calories with muscle than you do with fat. I wouldn't get so hung up on the numbers on the scale as I would with how clothes are fitting, what your friends are saying, etc. If you look good to your friends, and you feel okay inside about how you look, then it's a good weight. If you find yourself thinking you're unhealthy even though you're at a healthy weight, I'd seek some professional help.
476108
It takes 3500 calories to either gain or loose a pound depending on if you are consuming or burning the calories.  You need to burn more than you consume and you will loose weight.
124854
2000 calorie a day to maintain a weight 1200 to 1500 to lose weight
1053215
In a week, about 1/5 of a pound.  Running burns approx 100 calorie per mile.  (Could be more or less depending on your weight, the speed you run, and the difficulty.)  So 7 days, 1 mile is 700 calories.  You need to burn or have a calorie deficit of 3500 calories to lose 1 pound.  \n\nTo lose more weight, you'll need to watch what you eat and run more than 1 mile.  Also, give yourself longer than one week for noticable results.
336423
It's a simple formula. Every 3500 calories equals 1 pound. You decide how you want to get rid of it- diet, exercise or whatever (a combination is best), but you'll need to get rid of 3500 calories to lose 1 pound of fat in a week.\n\nJust eat healthy, and less quantity... Lots of exercise, water, and eating several small meals throughout the day is key. Doesn't matter what kind of cardio you do, just start burning those calories.
1036142
Typically you should have at least 1500 calories in order to lose weight. Remember , you must eat to lose weight. And this is my assuming you are a woman. For a man I think it is 2000.
1139449
If you can burn about 500 calories per day (and don't eat more to compensate), you can lose 1 pound per week.