PulsePomThe short answer
- Pomodoro (25 minutes, 5-minute break) is the easiest to start and the best studied of the three for students.
- 52/17 comes from one company's analysis of office workers' computer use, not from an experiment, and its own authors have since found other ratios.
- 90-minute blocks suit deep work like writing or long problem sets, but the evidence that 90 minutes is a special length is weak.
What the evidence does support, for any of them, is taking regular, planned breaks instead of studying until you're exhausted.
The three methods side by side
| Method | Focus | Break | Where it comes from | Good for |
|---|---|---|---|---|
| Pomodoro | 25 min | 5 min, longer after 4 | Francesco Cirillo, 1980s | Starting, practice questions, flashcards |
| 52/17 | 52 min | 17 min | DeskTime's 2014 data on office workers | Reading, assignments |
| 90 minutes | 90 min | 15 to 20 min | Ideas about a 90-minute rest-activity cycle | Writing, long problem sets |
Pomodoro: 25 and 5
The Pomodoro Technique uses 25-minute focus blocks, 5-minute breaks and a longer break after four rounds. It's the one with a direct study on students: in 2023, university students who took fixed breaks (6 minutes after every 24, or 3 after every 12) reported less fatigue and distraction and more concentration and motivation than students who chose their own breaks, while getting through the same amount of work (Biwer et al., 2023).
Choose it when a task is hard to start, when you're doing many small things such as flashcards, or when your focus is fragile. Read the full guide to the Pomodoro Technique.
Try Pomodoro: 25 and 5
Opens PulsePom's Timer with Pomodoro Settings filled in. Press Save, then Start. No account needed.
52/17: where the numbers come from
In 2014, the time-tracking company DeskTime looked at the computer use of the 10% of its users with the highest share of time in work apps, and found they tended to work for 52 minutes and then break for 17 (DeskTime). The idea spread widely.
Two things to know before treating 52/17 as science:
- It's an observation of office workers' computer use, not an experiment, and nobody was assigned to work in 52-minute blocks to see what happened.
- When DeskTime repeated the analysis in 2021, the most productive users' pattern was 112 minutes of work and 26 minutes of break; just before the pandemic, in February 2020, it was 80 and 17 (DeskTime).
So there's nothing magic about 52. What the data does suggest is that productive people take real, fairly long breaks.
Choose it when 25 minutes feels too short to get into reading or an assignment, and you want a generous break.
Try 52 and 17
Opens PulsePom's Timer with a 52-minute focus and a 17-minute break filled in. Press Save, then Start.
90-minute blocks
The 90-minute block draws on the idea, from the sleep researcher Nathaniel Kleitman, that a roughly 90-minute basic rest-activity cycle carries on through the day as well as during sleep (Kleitman, 1982). Studies of expert performers also found that deliberate practice is so demanding that it is limited to a few hours a day, done in sessions with rest between them (Ericsson, Krampe and Tesch-Römer, 1993).
Neither shows that 90 minutes is the best length for studying. Treat it as a practical choice for work that takes a long time to get into, like writing an essay or working through a problem set, and take a proper break afterwards.
Choose it when you're doing deep work and interruptions every 25 minutes would break your train of thought.
Try 90 minutes
Opens PulsePom's Timer with a 90-minute focus and a 20-minute break filled in. Press Save, then Start.
How to choose for yourself
- Match the task. Short, repetitive tasks suit shorter blocks; deep, creative tasks suit longer ones.
- Notice when your focus fades. If you're checking the clock at minute 15, use shorter blocks; if the timer keeps interrupting good work, use longer ones.
- Keep the breaks real. Whatever the length, step away from the screen, and avoid starting a short-video feed.
- Test it for a week. Use one method for a few days, then another, and compare your study hours in your stats.
FAQ
Is the 52/17 rule backed by science?
It comes from DeskTime's 2014 analysis of office workers' computer use, not from a controlled experiment, and DeskTime's own 2021 repeat found a different pattern (112 minutes of work, 26 of break). It's a reasonable rhythm to try, not a proven optimum.
Is the Pomodoro Technique better than 52/17?
Neither has been shown to be better for everyone. Pomodoro-style fixed breaks have the more direct evidence for students, and shorter blocks make starting easier; longer blocks suit deep work. Try both.
How long should a study session be without a break?
There's no single answer. Studies support taking regular planned breaks rather than going until you're exhausted. Somewhere between 25 and 90 minutes covers most people and most tasks.
Can I set my own times in PulsePom?
Yes. In Pomodoro Settings you set any focus, short-break and long-break length, and how many sessions come before a long break. The buttons on this page fill them in for you.