I can never get enough
sleep, even when I have the opportunity, awakening after 3-5 hours an unable to go to
sleep again, but still feeling VERY tired.
The circadian rhythm is what it is: A Rhythm. If this rhythm is broken, as in anything that has a rhythm, it will not run as efficient. Some people can continuously work these crazy hours, most can't. Now with the economy as bad as it is, people will be working more hours, if they have a job, and more people will be effected by this.