Physical activity can give us a burst of adrenaline, which can help us stay alert and motivated throughout the day. However, it can wreak havoc on your sleep schedule if you work out too late at night ...

Either you're a morning person with an interrupted sleep schedule, or your sleep ... For example, young children tend to wake up early, teenagers stay up late and sleep late, and older adults ...

Going to bed late, regardless of natural inclination, is associated with poorer mental health, according to a study.