The afternoon crash is not made in the afternoon. Whatever flattens you at three usually happened before ten: how you slept, whether you ate, when you last had caffeine, and how much you drank. The crash is the last event in a chain, and the rest of the chain is the part nobody writes down.
Everyone has some dip after lunch. The question worth answering is why some days it costs you twenty minutes and other days it costs you the rest of the afternoon.
What tends to line up with an afternoon crash?
The things that come up again and again in people’s own records:
- A short or broken night. Often shows up the following afternoon rather than the following morning.
- Caffeine timing. Too much early, then nothing, produces a hard landing. A missed usual coffee produces the same.
- A long gap between meals. Breakfast at seven and nothing until two is the most common version.
- A very large lunch, or a very fast one.
- Not enough water across the morning.
- Hours at a desk without a break. Movement matters more here than people expect.
- Cycle day, if that applies to you.
Any one of them may cost you nothing. Two on the same day is usually where the bad afternoons come from.
How do I find my own version?
Log the morning, not the crash.
For two weeks, write down each day:
- Wake time, and roughly how the night went.
- Every coffee, tea or energy drink, with the time.
- When you ate, and what you skipped. Timing matters more than detail here.
- Roughly how much water you drank.
- How your energy felt at three points: morning, mid-afternoon, evening, on a 1 to 5 scale.
Then compare the mornings of your worst five afternoons against the mornings of your best five. You are looking for something that shows up far more often before the bad ones, not something that shows up every time.
How long before I see something?
Two weeks is usually enough if this happens most days. Four weeks if it happens once or twice a week, because you need enough good afternoons to compare against. A candidate that appears before eight of nine crashes and one of twelve good afternoons is worth testing. One that appears before half of each is noise.
Then run the test. Move your last coffee to noon, or put a real lunch in on the days you usually skip it, and keep everything else the same for a week. Read the record afterwards rather than trusting your memory of how the week felt.
How Lopie does it
Lopie takes the whole day in one sentence. “Slept badly, coffee at seven and ten, no lunch, wiped by three.” Lopie files each part separately with its time. That is the entire daily effort, about two minutes, with no form to work through.
Sleep comes in from Apple Health with a sleep score, so your nights land on the timeline without you estimating them, and an energy view sits beside your meals, caffeine and routines. After about 14 days Lopie shows what tends to line up with your low afternoons and what tends to line up with the good ones, which is the comparison that makes this readable.
Lopie shows possible patterns in your own entries, never a cause.
Two minutes a day. First pattern in 14 days.
Download Lopie for iPhone (free)Lopie is free to download, with a 7-day free trial of Lopie+ (then $69.99/year or $2.99/week).
If the whole day is flat, not just the afternoon
Worth separating. A crash is a drop from a decent morning. If your energy is low from the moment you wake and stays there, the afternoon is not the interesting part, and a record of your days is the most useful thing to have in hand when you decide what to do next.
Related guides
- How to Find Your Personal Energy Patterns
- Nights That Wreck the Next Day
- Why Do Some Mornings Start Rough?
Lopie is a wellness and journaling companion, not a medical device. It shows possible patterns in what you logged, nothing more.