I get up about two to three times a night. I&#x27;m not sure why, as there are multiple explanations. I go to the toilet, drink some water, and go back to bed. That takes about two minutes.<p>In this research, people were forced to wake up every hour and then stay up for 20 minutes. Then I would feel totally different - I have no doubt. After twenty minutes, probably in bright light, I would be awake and that would disrupt the sleep cycle totally. This might be the case when you have a small kid, but how often does this happen (in the real world) with these frequencies?<p>With me this is not the case. It feels natural. I don&#x27;t put the light on - I can find my way without it. It takes two or three minutes, and that&#x27;s it. Back in bed I fall asleep right away.<p>This research is presented here as if this would influence my mood? I don&#x27;t know. I guess I can sleep better, but this is not the explanation that works for me.