Hello to you and to you and also to you...

I can see why that seems tempting - but really, the idea is to burn more calories than you eat. It's counter productive to eat calories that you earn. Burn, baby, burn!

I can see why that seems tempting - but really, the idea is to burn more calories than you eat. It's counter productive to eat calories that you earn. Burn, baby, burn!

Actually, you want to eat your exercise calories to provide your body fuel. MFP already sets you up with a daily calorie deficit; not eating your exercise calories increases this deficit and if you're not careful you'll actually hurt your weight loss progress instead of helping it.

For example, for maintenance you're allotted 1800 calories per day. You want to lose 1 lb per week so since 1 lb = 3500, divide by 7 days so that's 500 calories a day that MFP subtracts from your 1800, giving you only 1300 to eat. Now, say you workout and burn 500 additional calories, that puts you now at a 1000 calorie deficit. If you want to stay at 500 calorie deficit you'll want to eat that 500 or most of it. Otherwise, if you only eat the 1300 MFP gave you and not the exercise calories, that's saying you only ate 800. If you do this on a continual basis, your body will go into starvation mode and slow your metabolism down and start to store fat instead of burning it because it's not getting enough to function. That's because 1200 is the minimum amount of calories your body needs to burn every day to function properly. So those 500 calories you burn, you need to eat at least 400 back to stay at the 1200 level.

Hope the example makes sense.

In your case, if it's only one day and you're not hungry enough to eat all 700 left over calories, then don't. But don't roll them over either. Each day is a new day, to be taken one at a time.