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Crash dieting: How much weight could I lose in 10 days?

If I consumed 1500 cals a day and burnt 500 of those off through exercise?
I’m running a half marathon and want to be as light as possible on the day to make it as easy as possible.

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7 Responses to “Crash dieting: How much weight could I lose in 10 days?”

  1. Barmmy said :

    1500 cals a day isn’t what I’d call crash dieting, I’ve lived off less then 500 calories a day with exercise. I’ve gone 2 weeks on nothing but water, I really don’t suggest doing that though.

    In 10 days you could probably lose 2 or 3 lbs.

  2. Scott said :

    body fat contains 9 kcal of energy for every gram, if you put in 1000 less kcal than you need to function each day, you will take 1000 kcal from your body fat, which means 1000 divided by 9 = 111 grams, where as if you used 500 kcal more than you put in you would burn 500 kcal of fat (500 div 9 = 55.5 grams)

  3. britters19135 said :

    Depends what kinds of food you eat, just because its 1500 cal, it should be a healthy 1500 calories. But I mean as long as you stick to that, you should lose maybe 3-4 pounds.

  4. Kayli said :

    a healthy amount to lose in 10 days is about 2 pounds, give or take a little bit. crash dieting isn’t healthy and in the end, the weight you lose isn’t the fat you should aim to burn. when you crash diet you lose water weight and muscle because your body literally eats your muscles. it’s looking for protein and its eats you from the inside out. also, drastic changes in diet won’t work if you’re looking to make a quick fix. if you eat only lettuce for a week and lose 6 pounds but then go back to all your normal foods, you’ll gain the weight back in a matter of hours. burning 3500 calories burns the equivalent of 1 pound of fat. find healthy foods and make sure you get enough vitamins, minerals, proteins, carbohydrates, and some healthy fats too. if you can find a healthy way to consume 1500 calories a day and then burn off 500 a day, you can probably lose about a pound a week. losing weight is slow and not fun, but if you make the right approach, you can keep it off and feel good about yourself. good luck! hope i was helpful! :]

  5. Malina said :

    You can lose about 3 pounds MAX in 10 days…unless you want to be fatter down the road.
    The FASTER you lose it, the FASTER you will gain it back.

    When you lose weight you also lose muscle. When you gain it back, you
    do not gain muscle you gain fat. The amount of muscle you have is what determines your
    BMR( Basil Metabolic Rate) Every time we lose more muscle, our metabolism goes down meaning
    you cannot eat as much as you did before.
    Crash dieting (yo-yo dieting) actually REALLY DOES makes you fatter.
    To successfully lose weight it must be done slow so that you burn MORE fat than muscle. This prevents too much muscle loss.
    Lose it fast- Gain it back fast. This is always true.
    To prevent muscle loss, you don’t want to lose more than 2 lbs a week.
    Good things come in time.
    “if you don’t take care of your body, where are you going to live?”

  6. Ed said :

    Well doing the maths… Assuming a maintenance of 2000, You would lose 2.9 pounds of fat, so your probably looking at a weight loss of maybe 5 or 6 pounds? It is hard to estimate without knowing your maintenance level of calories.

    Just some extra advice and I may well be telling you what you already know… but no harm I suppose.

    I don’t think this would really be considered a crash diet but you may be worried about muscle loss/ being tired on a more extreme diet. However, if you do a ‘PSMF’ (protein sparing modified fast) for 8 days you would lose around 8-10 pounds. You could then ‘carb load’ for 2 days – you would put on some weight but it would all be water/ glucose stored in your muscles which would actually help you perform much better on the half marathon.

    The problem comes in with the exercise… I’m not sure if you are just doing it for more weight loss or if your doing it as traning for the marathon.

    If your doing it purely for weight loss, then I would follow a PSMF for 8 days then carb load. So, for 8 days you would just eat lean proteins and green veg – the low calories would make you lose the weight, the low carb will deplete your stores ready for the carb load and the high protein will keep your muscle mass. So eat things like chicken salad/beef stir frys etc 3-4 times a day.

    Then on the last two day you would want to eat high carb foods like pasta/ bagles/ potatoes but keep your fats low – you won’t gain fat because you’ll be loading your muscles with carbohydrates not storing them as fat. That’s about it, though I’m writing a site that might help you get the diet down a bit better and you should search go to the forums to find info on carb loading

    Hope this helps – email me if you want, my email is on the contact me page of the first site

  7. Jude Bocchi said :

    That is how to stop worrying and be happy about your.


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