we generally take around 10 to 20 minutes to go from awake to asleep. You might find that you occasionally go to sleep even quicker than this, however, when you’re feeling especially tired.

Feeling tired after lunch ... step away from whatever you’re doing to be present with your meal, taking even just five minutes to do so can help, experts said. Sometimes, however, the makeup ...

Waking up tired occasionally is not usually a cause ... Research shows it takes around 15–30 minutes for alertness to reach pre-sleep levels. The cause of sleep inertia is not entirely understood.

Where work is concerned, I’m a good example of Newton’s first law of motion: Sometimes I have a hard time getting started, but once I’m going, I tend to stay going, and going, and going.