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2. Fatigue - Wikipedia

   en.wikipedia.org/wiki/Fatigue

   Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. [2] [3]A 2021 review proposed a definition for fatigue as a starting point for discussion: "A multi-dimensional phenomenon in which the biophysiological, cognitive, motivational and emotional state of the body is affected resulting in significant impairment of the individual's ability to ...

3. Fatigue - en.wikipedia.org

   en.wikipedia.org/.../page/mobile-html/Fatigue

   Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. A 2021 review proposed a definition for fatigue as a starting point for

4. Muscle fatigue - Wikipedia

   en.wikipedia.org/wiki/Muscle_fatigue

   Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force. It can be a result of vigorous exercise , but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction .

5. Learning Whether You’re Experiencing Tiredness or Fatigue Can ...

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6. Central nervous system fatigue - Wikipedia

   en.wikipedia.org/wiki/Central_Nervous_System_Fatigue

   In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]

7. Lethargy - Wikipedia

   en.wikipedia.org/wiki/Lethargy

   Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, 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, improper nutrition, drug abuse, boredom , or a symptom of an ...