response: I wouldn't know, but there is some evidence that cognitive behavioral therapy combined with increasing activity can help.
original_response: I'm sure it is, but people are starting to see that behavioral therapy and a slow increase in activity can help counteract the effects.
history: I have quite a lot of energy, but I know some people just aren't as lucky. Is their a medical condition for being constantly tired? There is a condition called chronic fatigue syndrome in which people have long-term fatigue in a way that limits daily activity. That must be awful. I wonder what causes it. Depression perhaps? I don't think the cause is fully understood.  It could be genetic, could be biological, or it could be psychological. Well, I guess the medical profession had better get to the bottom of it. It must be destroying people's lives!
knowledge: Evidence suggests that cognitive behavioral therapy and a gradual increase in activity suited to individual capacity can be beneficial in some cases.