lindsey, we need to get some calculations based specifically on your height and body weight. I’m not sure how old you are – I’ll estimate both 25 and 30, for conservative matters. Search for “daily calorie maintenance” calculators on-line. These are a combination of both your BMR and the calories you burn per day doing things like housework (your BMR is the number of calories you burn per day if you were, say, comatose and/or totally inactive each day):
Assuming you’re sedentary (and 25), your daily calorie maintenance is about 2100 calories. Assuming you’re 30, it’s about 2050 per day. Calculators will vary according to the formulas people use, but these are reasonable averages.
I don’t know how intensely you’re working out or how high your heart rate gets – but I’d estimate you’re burning about 1100 calories a week on the elliptical and about 500 a week walking. Maybe another 250 for your 25-minute cardio work-out, depending on what you’re doing.
So…about 1,850 calories per week you’re burning (I’m not including strength-training in this, as I don’t know what you’re doing. I’d include circuit training, like a Jillian Michaels’ work-out, since those can get the heart rate roaring).
If I were you, unless you’re going to devote more time to cardio, I would scale your weight loss efforts to a loss of 1 to 1 1/2 pounds a week. For 1 1/2 pounds a week, that would mean eating around 1600 calories a day (which is about a 500-a-day deficit for you) and continuing what you’re currently doing for exercise.
I agree with the others, though – you’re eating far too little.
For comparison, I am about your size and while I generally burn more calories (about 5-7k a week), I’m eating right around 2,000 a day. I am still losing weight.
And if you’re just starting, there’s no need to so drastically cut calories. You may even want to stick to around 2k calories right now and work out…see where that gets you. It may be more sustainable for you in the long run.
I know that it’s far easier for me to work out than it is to abstain from eating, but I know that varies from person to person.