What it is
Lethargy describes a state of physical and mental sluggishness, lack of energy, and reduced initiative that goes beyond ordinary tiredness.
Research-supported
Lethargy
A pervasive, heavy sense of physical and mental sluggishness and reduced drive — beyond ordinary tiredness — that impairs initiative and engagement.
CategoryEnergy
Reviewed by Gyfts Editorial Team · Editorial Health Review
26 March 2026
At a glance
Lethargy at a glance
Commonly experienced as
- People describe feeling unable to engage mentally or physically, movements feeling heavy and slow, and finding even simple tasks requiring disproportionate effort.
