do you have any advice

First you need to do some basic math…

1 pound = 3500 calories.

Therefore 20 lbs = 70,000 calories

Next, be aware that you should not eat less than 1200 calories a day. 1200 cals is what is needed to keep your body functioning correctly (heart, lungs, liver, etc)

So 1200 cals/day X 30 days = 36,000 calories eaten per month

Now… knowing you need to LOSE 70,000 calories, and CONSUME 36,000 calories, you can deduce that you need to EXPEND 106,000 (70,000 + 36,000) calories a month.

Divide 106,000 by the number of days you want it to take for you to lose that 20 lbs.

For example:

106,000 by 60 days = 1766.666

Next find your Basal Metabolic Rate - there are plenty of calculators out there that will help you do this. Your BMR is the amount of calories your body burns each day to sustain itself.

Let’s assume your BMR is 1500 calories.

Knowing you need to burn 1766 cals/day, and your body naturally burns 1500 cals/ day, you will need to expend an additional 266 calories per day through exercise!

Of course your BMR will fluctuate day to day… so this isnt an exact science, but it is something to go by.

Also, assume that in the beginning you will lose water weight, which has nothing to do with calories.

Remember too, if you drop below 1200 calories/day, your body is likely to go into starvation mode, which will cause your BMR to drop - thus making you expend more calories than you’re cutting… cruel punishment, I know!

Also since you’re going through all this heard work… make sure you make the 1200 calories you are eating healthy choices.

Good Luck!!!