Calories....

you want your net to be right around your goal, net factors in what you've eaten less exercise, the difference between net and goals is what you have left for that days calories.

POSITIVE! If it's negative, that means you're not providing your body ANY fuel for normal day-to-day functioning. NOT a good idea...

You generally want your net calories at the end of the day to be close to your calorie goal setup by MPF.

If you're following "the plan" as MFP gives you yes your net is way low. You've provided your body with under 300 calories to do everything that it does for you on a daily basis from digesting to breathing to pumping your blood and everything else it does.

Thanks guys - just check i got this right.....

I am supposed to eat 1,200 calories a day....I have burnt 817 calories.....and my net is 258.....so thats too low?

Yup! Eat up.... It won't kill you to eat a net under 1200 (even significantly under) every once in awhile, but you don't want to do it regularly. From now on, try to plan ahead and eat bigger breakfast/lunches/snacks on days you know you'll be working out, add in a bigger dinner/evening snack too. The more you spread your calories out, the easier it is to eat enough high-quality calories.

Think of more calorie-dense foods like avocado, nuts (and nut butters), hummus, beans, etc. if you need to get a good bit of calories in. Homemade smoothies can also pack a punch. I typically use a milk base (or almond milk) with some fresh fruit, uncooked oats, flax seed, peanut butter, and sometimes some cocoa powder and/or cinnamon. Delicious!

Thanks guys - just check i got this right.....

I am supposed to eat 1,200 calories a day....I have burnt 817 calories.....and my net is 258.....so thats too low?

Yes, so you need to eat the 817 cals to be back at 1200 Net for the day. Anything below that will make your body to go into starvation mode becos of the lack of enough nutrients.

Just to avoid any misconceptions - you will NOT immediately go into starvation mode or anything like that. It requires prolonged undereating. Eating too-few calories every once in awhile isn't a problem... it happens to most people occasionally. It just shouldn't be a habit. As a general rule, you should be working to keep your net calories at a reasonable level (which is typically considered to be 1200).