Modern people know firsthand what chronic fatigue is. Stress, intensive work, an excess of information, coupled with a lack of free time - such a burden falls on the shoulders of millions every day. We try to resist, but the body's resources are not unlimited. The forces leave us, and then one day we realize that we are completely exhausted and more than anything else we want not new achievements and discoveries, but at least just get enough sleep. But, alas, there is simply no time for this...