Why You're Always Tired Between 1pm to 4pm (and what to do about it)

Summary

The video explains that afternoon tiredness is partly a normal circadian pattern: sleepiness often rises in the early-to-mid afternoon, then drops in the evening during a “wake maintenance zone,” when many people get a second wind. The presenter says the post-lunch dip is not simply caused by blood being redirected from the brain to digest food.

Strategies discussed

• Take a short nap if possible. The presenter cites a 10–20-minute nap as the research-supported option most likely to help with afternoon alertness.
• Avoid alcohol during the day. Alcohol can intensify sleepiness.
• Use caffeine cautiously. A “napuccino” means having caffeine just before a 10–20-minute nap, so its effects begin around the time you wake. The presenter describes it as an occasional tool, not a daily fix, because caffeine can linger and reduce nighttime sleep quality.
• Schedule brief physical activity before the slump hits. Try 5–10 minutes of light-to-moderate activity around the time you expect to get sleepy. A short walk every 30–40 minutes may help sustain alertness.
• Match tasks to the time of day—but choose engaging work. Rather than switching to boring admin, the presenter found that deep thinking and problem-solving helped him stay more alert. He combined focused work with brief walks.
• Prioritize enough sleep. The presenter calls this the most important long-term strategy. He warns that people can feel as if they have adapted to too little sleep even while attention, memory, concentration, thinking speed, and emotional regulation continue to suffer.
• Reduce late-night screen exposure if it is delaying sleep. The presenter says close-up screen light can push the body’s evening wakefulness period later. He suggests cutting screens off earlier—by roughly the amount you want to shift bedtime—and finding another way to wind down.
• Don’t drive when drowsy. The presenter shares a near-crash caused by falling asleep at the wheel, illustrating the risks of severe sleep deprivation.

Presenters and sources

• Presenter: Dr. Justin Sung
• Sources discussed: Chronobiology and sleep research, referenced generally; no individual researchers or studies are named in the subtitles.