Let’s see… There are 3500 calories in a pound, so you would have to lose 87500 calories. That comes out to losing 12,500 calories each day. It’s impossible. First, because there aren’t enough hours in the day, and you can’t exercise during the course of every single waking hour; second, because your body needs time to recuperate. You can safely lose 2 pounds per week, with a combination of eating modification and exercise. If you try to lose weight too quickly, it will just come right back, or you could hurt your health permanently. Slow and steady wins the race.
I’m guessing that the “impossible” and “starve yourself” answers are trying to be funny – ? A goal of losing 25 pounds in 6 months is definitely attainable; that’s about 1 pound per week and it’s best to lose weight slowly, at a rate of 1-2 pounds per week.
Eat a balanced, varied, healthful diet instead of following one of the fad diets that are unrealistically restrictive. Drink lots of water; even diet pop isn’t a great idea, but for sure avoid the sugared kind. Get 30 minutes or more of exercise most days of the week; it should be intensive enough to increase your heart and respiration rates. Get sufficient sleep each night.
First of all, if you want to lose 25 pounds of weight, it doesn’t mean you have to cut 3500 calories per pound to do so – you would also be losing a certain amount of water, so if you lost 25 pounds of fat, your total weight loss would be more.
Secondly, 3500 x 25 = 87500 87500 / 180 days = 486. So you would only have to cut out 486 calories per day, not 12,500 each day.
At 2 pounds per week for 24 weeks (6 months) you could lose 50 pounds.
Diet, cardio, and exercise will also help you feel better and replace some of that weight that was fat with muscle.