Having trouble getting out of bed? Wish you could put your head down on your desk for some shut-eye after lunch? You're certainly not alone ‑- "energy" is at the top of the list of frequently used search words at iVillage.com. In this roundtable discussion, four experts from four distinct disciplines share their views on why Americans are suffering an energy crisis, and what we can do to relax, rejuvenate and renew.

In your experience, what is the number-one cause of fatigue?

Joan Borysenko, PhD, Psychologist: People are so busy they don't sleep enough. We are an incredibly sleep deprived nation. And we're losing out on sleep because we shortchange ourselves to give to others. Then we end up exhausted and trying to do for others from a depleted place.

Elizabeth Somer, MS, RD, Registered Dietician: Several things contribute to fatigue, but the first thing is eating erratically. By that I mean skipping meals, especially breakfast, and taking in too much sugar and caffeine. When you skip breakfast, you are much more likely to battle physical and mental fatigue during the day. If you grab a doughnut, a Pop Tart or a cup of coffee, you feel good temporarily, but then your energy takes a nosedive. I have also learned that people who are tired all the time are often just dehydrated. The first symptom of dehydration is fatigue.

Kenneth Cohen, Qigong Scholar and Teacher: A lack of downtime. Society today believes that people need to be constantly productive. Our bodies are in overdrive. Our stress response has become chronic. Our ancestors would have brief periods of nervous-system overdrive when they encountered danger. Today, the stresses never seem to disappear. The residual effects of stress ‑- low energy, nonrestorative sleep, libido that's too high or too low and anxiety disorders ‑- are epidemic in the U.S.