What the 52/17 rule is
Work for 52 minutes on one thing, then take a 17-minute break away from the screen, and repeat. It is a longer cousin of the Pomodoro Technique: fewer, deeper blocks and fewer, longer rests. Three rounds fill about three and a half hours, which is a good morning's work.
Where 52/17 comes from
In 2014 the time-tracking company DeskTime looked at the top 10% of its users by productivity and found they worked in bursts averaging 52 minutes, then broke for about 17. The break was a real break: away from the computer. It is one company's data, not a controlled study, but the shape matches what other work on attention suggests: near an hour on, a substantial rest, repeat.
DeskTime repeated the analysis in 2021 and found the most productive users had moved to about 112 minutes of work and 26 of rest, which it put down to remote work and longer days. The exact numbers move; the pattern of long focus followed by a proper break did not. If 52 feels short, try the 90-minute or 2-hour timer.
52/17 or Pomodoro?
Pomodoro's 25 minutes is easier to start and suits small tasks and tired days. 52/17 suits work that needs context, like writing, coding or a problem set, where the first ten minutes go on remembering where you were. If 25 keeps ending just as you get going, 52/17 is the next step. If 52 feels like a wall, go back to the Pomodoro timer.
The important half
The 17 minutes. The productive users did not use them to check email. Stand up, get water, look out of a window. The next block is armed when you come back and waits for you to press start.
DeskTime, "The secret of the 10% most productive people? Breaking!" (2014) and "52/17 updated" (2021).