Join Date: Jan 2002
Location: Orlando, FL
Bikes: litespeed, cannondale
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There are several places where errors can crop up.
Obviously, if you have a 1000 calorie deficiet per day, you HAVE to lose at least 2 lbs per week. So something is wrong with your measurements.
Now it is possible to get a pretty accurate measurement of caloric consumption. Nearly all foods are accurately marked for caloric content. However, portions are a lot smaller then people think so you might have an error there. I understand that people who rely on strict calorie counting routinely measure and weight everything they eat. So have you done this? You might just have an error in the consumption side of the equation. The nice thing is, you can check your figures here by taking the proper measurements.
The other problem is in the calories burned section. You can get estimates on calories burned for various activities but those are only estimates. And if you look at different sources, there is a very wide range on the estimates. Estimates of the caloric burn rates of various forms of exercise can vary by about 5 fold and they can vary that much in actuality depending on the person involved and the intensity of the activity. And there is no covenient way to get a direct measure on calories burned. You could measure your oxygen consumption and co2 production through the day, but I don't think anyone has ever done this. It is really, really inconvenient. I think it has only been done in a lab setting for limited time intervals. So your estimate on your calories burned could be off and I don't see how you can find a way to come up with the correct figure to confirm or correct your current figures.
Oh, there is another problem. The human body has a response against starvation (weight loss) and that is to scale down the metabolic rate. Your body just might have done this for you. So what worked early on, just won't work now. For many people, exercise will couteract this. Exercise tends to increase metabolic rate.