Question

How are we still using energy while sleeping

Answer 1

We still using energy during sleep, because brain energy is used during sleep less than when we are awake, as sleep is an important stage, and a person must sleep at a minimum of 8 hours per day because there are nerve interactions inside the brain where some interconnections between cells are controlled, negative thoughts and excess protein partsin the brain are eliminated and re-operations build up in nerve cells

Answer 2

We still using energy while sleeping through our dreams, which we dream, it's consider chemistry mental doing while sleeping, and our thinks make this, this means that our prain awake every moment