Ask 10 parents — by a show of hands — if their teenagers are persistently tired, and nine out of 10 hands will raise. Many will say their teens suffer from:
- fatigue, memory and concentration difficulties affecting academic performance,
- mood disturbances and irritability,
- and/or behavioral problems such as hyperactivity and aggression.
As a result, more and more parents are bringing their teens in for sleep studies. The results typically reveal a circadian rhythm disorder.