Why we are so sluggish and tired in the morning despite having just rested our bodies?

Question

Even with the full 8 waking up and moving around at the start of the day is fatiguing. Even when we are young.

In: 167

Answer 1

Not enough sleep the night before, persistent sleep debt, being woken up in the middle of a sleep cycle, not enough exercise, eating too late, having caffeine too late, using electronics too late, sleep apnea, smoking…