Eating 1000 calories a day for 4-6 days?

Question

what would happen if someone with a fast metabolism would eat about 1000 calories for 4-6 days but after that start eating normally again?

would they have lost alot of muscle? would they have damaged their metabolism?

Answer 1

of course they would have NO muscle gain! muscle is created when muscle is slightly torn then puts excess on to repair it, thus creating larger muscle mass. I don't believe it would damage their metabolism too bad.

Answer 2

They would damage body,metabolism,lose muslce and awarness cause this does mess with your brain.