|WikiProject Health and fitness|
It is tiredness, weariness, fatigue, or lack of energy. It can be accompanied by depression, decreased motivation, or apathy. Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, or boredom. When part of a normal response, lethargy often resolves with rest, adequate sleep, decreased stress, and good nutrition.
This article does not explain the difference between lethargy and fatigue; AFAIK there is no strict medical difference, and this article would probably best be a redirect to fatigue. BubbleEngineer (talk) 22:40, 10 May 2018 (UTC)