Focus
Lunch Slump
A lunch slump is the mid-afternoon crash in focus and energy—often driven by meal composition, sitting after lunch, sleep debt, and the circadian dip.
A lunch slump is the mid-afternoon energy and focus crash—often one to three hours after eating—when alertness dips, yawning spikes, and deep work feels impossible. Big refined-carb lunches, skipped movement after eating, short prior-night sleep, and the natural circadian trough stack together.
Fix timing and composition before chasing more coffee: protein-forward midday plates, a brief post-lunch walk, and lighter afternoon snacks beat a fourth espresso. Ohga tags lunch slumps when focus ratings crater between 2 and 4 p.
m. on days with fast desk lunches or empty lunch logs.
Common questions
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Is a lunch slump always from eating too much?
Not always—circadian rhythm and poor sleep contribute even with light meals. If slump hits daily after pasta-only lunches, composition and a ten-minute walk usually help more than skipping lunch.
Related terms
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