What state is characterized by reduced alertness and increased tiredness?

The state characterized by reduced alertness and increased tiredness is fatigue. Fatigue refers to a condition of physical or mental weariness that results from prolonged exertion or stress, leading to diminished energy and capability to perform tasks effectively. It typically presents as a lack of motivation, decreased concentration, and a feeling of heaviness or lethargy. This state can significantly impact an individual's ability to focus or engage in activities, making it challenging to function optimally in both physical and cognitive tasks. Unlike other states such as stress or exhaustion, fatigue specifically emphasizes the diminished alertness and increased tiredness rather than the intensity or duration of the condition.