Guide · Breaks

What to actually do on a break

A real break is a deliberate pause between two pieces of work, long enough to change what your attention is doing and short enough that you come back. Most advice about them is asserted rather than tested. This page sticks to what has actually been measured, including the part that does not flatter the idea.

What to do with five, ten, or fifteen minutes

The length you pick should follow the block you just finished, not a rule. Short breaks are well-evidenced for getting energy back. Longer ones are what the evidence points to after work that genuinely drained you.

One thing the list above deliberately does not say is "rest". A meta-analysis of 117 incubation studies found that filling a break with an undemanding task produced a larger effect than filling it with a demanding one, and for some kinds of problem an undemanding task beat doing nothing at all. Washing up is a fine break. So is staring out of a window. The thing to avoid is a second demanding task wearing a break's clothes.

Why the phone is the worst break that has been tested

This is the one place where the evidence is blunt. In a randomized experiment with 414 participants, people solved a set of word puzzles, took a break, and then solved a harder set. The break was the same task for everyone, choosing a few things to buy from a store listing, but on different media: a phone, a computer, or paper.

The phone group took about 19% longer on the second half than the paper and computer groups, and solved about a fifth fewer puzzles: 6.4 out of 10 against 8.1. On the study's measure of mental depletion, a phone break left people statistically indistinguishable from taking no break at all.

Two details make this more useful than the usual "put your phone down" advice. First, the phone task was not social media, messaging, or anything designed to hook you. It was a shopping list. The cost came from the device, not from an algorithm. Second, the phone group still did better than the people who took no break at all on the puzzles themselves. A phone break is not worse than nothing. It is just the one that gives you the least of what you took the break for.

The honest part: breaks buy energy, not speed

Nearly every page about breaks promises they will make you more productive. The best evidence does not support that, and pretending otherwise is how this advice stops being trustworthy.

A 2022 meta-analysis pooled 22 study samples, 2,335 people, on breaks of ten minutes or less. Two findings were solid: breaks reliably reduced fatigue and reliably raised vigor, with small but dependable effects that held across every condition the authors tested. The third finding was not: the overall effect on performance was not statistically significant.

Performance did move in two specific circumstances. Longer breaks helped more than shorter ones. And what you were recovering from mattered: breaks after creative work showed a real benefit, while breaks after cognitively demanding work showed none at all.

So the honest claim is narrower than the popular one, and better. A break is how you arrive at four o'clock with something left, rather than how you go faster at half past two. If you want the productivity argument, the closest real one is this: in a study of 87 students during genuine self-study, pre-set breaks left them less fatigued and less distracted, and more concentrated and motivated, than letting them choose when to stop. They got the same amount done either way. The break did not buy output. It bought the state you were in while producing it.

Four things about breaks that aren't true

• "Work 52 minutes, break 17." This came from a time-tracking company's blog post about its own users, not a study. The same company re-ran the analysis years later and got 112 and 26 instead, which is a good sign that 52 was never a property of the human brain.
• "It takes 23 minutes and 15 seconds to refocus after an interruption." There is no published paper behind this number. The study usually credited for it never measures refocusing time at all. The nearest real finding, from observing 24 information workers, is that interrupted work was resumed after about 25 minutes on average, with a standard deviation twice that size, which is a measure of elapsed time before returning rather than a cost of refocusing.
• "25 minutes is the scientifically optimal block." The 25-minute interval is one person's invention from the late 1980s. The closest randomized test compared 24 minutes with 12 and found both beat unstructured work, with no difference between them.
• "A break only counts if you truly rest." Covered above: an undemanding task can beat doing nothing, and in a diary study of 95 employees, non-work activities were no better than work-related ones. What predicted recovery was whether the person had chosen the activity. Being told how to spend your break is part of why breaks fail.

How Calibrate does this

In Calibrate, a break is a real part of the sitting rather than an absence from it. When a block ends you are asked how your focus went, and then offered a break or another block. Nothing auto-starts, in either direction.

The break gets its own clock, in its own colour, on your Lock Screen: five, ten or fifteen minutes, or a length you set. It runs there while your phone stays locked, which matters given what the phone-break evidence says. When the time is up nothing is forced. The card simply tells you the break is over and waits, and coming back is a choice you make rather than a bell you obey. If you take longer than you planned, that is recorded as rest, not as a failure. Every gap between blocks is counted as a break, because that is what it was.

The break card also carries one quiet line, drawn from the research above and rotating so it never becomes furniture: that phone breaks leave you more tired, that forty seconds of green is enough, that a few minutes is enough to feel less tired, that a walk gets the ideas moving, and that doing nothing counts too. It suggests. It never instructs.

Common questions