Hi all,
As for the 500 calories of mostly sugar, I consider it erasing your hard work as what you just ate, all that fat you just worked off by eating healthy and working out, for three days, has been put back so your back as square 2.
And no doesn't apply to only low-carb, this can happen to anyone, as you insulin and glucose storage boxes aren't as big as that 500 calorie desert. I haven't met anyone under 800 pounds that 300 sugar calories could be all contained in those two storage boxes, general over weight or normal people have a much smaller storage container, unless they are some insane diet.
Think of these boxes as a cup, you hold it under the faucet and if you don't turn it off, the water will run over the top. This actually happens anytime you get too much sugar at once, and it fills up both boxes, it will over flow back into the blood stream, as your body will not make another stroage box or try to pack a little more in there, when it's full all the rest goes into the blood stream. Sugar is like acid to the blood cells, so it immediately corrects the situation by taking the over flow of sugar and turning it into fat. Now this is were all your hard work just went bye bye, you just gained the same amount of fat as you just burned in about 2-3 days a good hard exercise. If you just ate 300 calories of sugar. I'm figuring the 200 calories of other stuff will hopefully not be sugar, or carbs. If it is, you just added ate another day of your hard work that week.
This is why I tell people to stay under 200 calories for a treat/reward, as that will generally take out your workout and diet for the day, maybe a little bit from the day before, but it's not a huge chuck of work that you just ate. I'm also assuming there is a little bit of protein/or fat in that treats, not just pure sugar.
Or yes you will have erased another day of hard work.
This is why too much sugar is so bad, if you can't store it, it gets turn to fat, as the blood can't carry it so it can be escorted out the door, so your stuck with all you ate.
HTH,
Kit