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skinnysammi
New Member
| Joined: | 29 December 2010 |
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| Posts: | 15 |
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Posted: 11 February 2011 02:33 pm |
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| I am trying to eat about 800-1000 cals a day, and I burn about 1000 Every other day when I work out. When I don't actually work out I am still very active around the house and at school. I am 17 yrs old, 125lbs, 5'2'', goal weight of 105lbs. does any one know how long it is going to take me to lose my weight as quickly as possible?
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Nir
Senior Administrator
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Posted: 12 February 2011 12:50 pm |
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If your body is behaving normally then your calorie expenditure (how many calories you are burning) can be reliably obtained from standard formulas. On a rest-day, a 17yo female 125lb 5'2" should be burning 1,566 calories and on days when she is burning an extra 1000 calories in exercise (let's assume this is over a 2-hour period) it'll be 1000 + 1566*22/24 = 2435 calories.
Calorie deficit is defined as the difference between calorie expenditure and calorie intake. If average intake is 900 calories, then deficit on rest days is: 1566-900 = 666. Deficit on exercise days would be 2435-900 = 1535. So after 2 days (one of each) 666+1535=2201. After 4 days 2201*2=4402. 4402/3500=1.25 so one might be predicted to lose 1.25lb every 4 days.
But what happens if you are not losing weight this quickly?
A somewhat conservative deficit is something like 15-20% (equivalent to eating 1253-1331 on a rest day, and 1948-2070 on your very active days as above).
On the other hand, eating 900 calories when your body requires 1566 (on a rest day) is a 38.3% deficit, and eating 900 calories when your body requires 2435 (on a very active day) is a 63% deficit, and these are considered to be 'agressive' or 'extreme'.
Well, our bodies can be smarter than we are. Our bodies take "shortcuts". If we consistently under-eat and over-exercise then our bodies find ways to need fewer calories so that our bodies will survive. (This feature of our bodies has historically proved useful in times of natural disaster.)
So if you have stopped losing 1.25lb every 4 days, that is a hint that your body has "adapted". In that case the 'clever' thing to do is to 'fix' your body so that (just like I described above for the 'normal' person with the same age height and weight) you are once more actually burning 1566-2435 calories depending on exercise.
Unfortunately it requires some mental strength and determination, because it is counter-intuitive. It kind-of makes no sense. The only way to fix a body that has 'adapted' as above is to gradually increase calorie intake over a period of a few weeks (and depending on the degree of the damage, up to 6 months) and for best results this has to be coupled with drastic reduction in the amount of activity.
This is a tricky period, especially if emotions are running high. It is useful to have some support.
The end result is that, after this relatively short period of a few weeks to a few months, you will be back on track. You will be able to lose the weight you want, you will be able to get quite lean. And you'll be able to do this whilst eating more and exercising less (so that means a smaller, more 'conservative' deficit, say between 15% and max 35%)
when you get to your goal of 105lb, you should be able to maintain you goal weight eating 1,458 calories when resting, and on the moderate amount (say 300-400) of exercise that will be recommended you'll even be maintaining on around 1,800.
and you might have to think of something else to do with your free time because 'dieting' will be a smaller part of your life 
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skinnysammi
New Member
| Joined: | 29 December 2010 |
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| Posts: | 15 |
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Posted: 12 February 2011 04:06 pm |
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Honestly,, there are usually only three things on my mind: School, boyfriend, dieting. It's very hard for me to not think of dieting. I'm always thinking of wayss to lose more weight, how to exercise more.
The thought of eating more kinda makes me feel sick...
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Nir
Senior Administrator
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Posted: 12 February 2011 06:46 pm |
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ok, if tackling the practical steps head-on is unlikely at the moment, maybe you can ask for help with your thoughts and feelings. As you are at school maybe there is some free counselling on offer? Then you can deal with things like increasing calories or reducing exercise with a 'cool head' later on, once you have made some progress. There are also helpful websites like http://www.something-fishy.org
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skinnysammi
New Member
| Joined: | 29 December 2010 |
| Location: | |
| Posts: | 15 |
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Posted: 12 February 2011 10:24 pm |
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maybe...what does it mean if you get dizzy and light headed when you eat?
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Nir
Senior Administrator
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Posted: 13 February 2011 08:48 am |
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all sorts according to http://www.buzzle.com/articles/dizziness-after-eating.html
is it just with certain foods?
(how varied is your diet anyway - or in other words what kind of foods have you tried)
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