If you’re constantly feeling fatigued throughout the day, but feel completely awake upon laying down to go to sleep, you may have an abnormal circadian rhythm. Circadian rhythm disorders can be caused by factors such as shift work, time zone shifts, or pregnancy. You can reset your circadian rhythm by improving your overall sleeping habits and having a consistent sleep schedule. Although you may feel tired during the day, long naps can confuse your circadian rhythm. We recommend taking short power naps to lessen any tiredness during the day.