90 Second Timer

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A boxing rest is a flat sixty seconds, which makes ninety the training variant: long enough for breathing to settle, short enough that the next set still costs something. In the weight room it is the classic hypertrophy rest, sitting between the thirty seconds that turns lifting into conditioning and the three minutes that heavy strength work needs. The same number is printed on instant noodle packets and used as the ceiling on a spoken pitch, so it gets typed into a timer far more often than its neighbours at sixty and one hundred and twenty seconds.

90 Second Timer Idle
00:01:30
HH : MM : SS

Ends with an audible alarm — keep this tab's sound unmuted. A running countdown keeps counting in a background tab and picks itself back up if you reload.

Open this page with the timer already running → — handy as a bookmark, though your device only lets a page make a sound after you have tapped it at least once.

Why 90 seconds

Spoken aloud, ninety seconds runs to roughly two hundred words at a conversational pace, which is why it survives as a pitch limit and a rehearsal length. Rehearsing against a visible countdown rather than a felt sense of pace changes what you learn from the run: you find out which sentence went long instead of whether you felt rushed. The countdown here survives a page reload, so refreshing between attempts costs nothing.

What people set it for

  • Rest between hypertrophy sets
  • Instant noodles that say ninety seconds
  • An elevator pitch rehearsal run
  • Timed speaking exercises
  • Rest rounds in boxing training

FAQ

Why do lifting programmes keep landing on ninety seconds between sets?
It is the compromise rest for hypertrophy work. Much under a minute and fatigue accumulates faster than the working muscle recovers, so the later sets fall apart. Past two or three minutes the session stretches out and the emphasis shifts towards pure strength. Ninety seconds keeps the reps achievable while the next set still arrives before recovery is complete.
Is ninety seconds the same as one and a half minutes?
Yes, the same interval written two ways, and the page counts down through one minute thirty. Gym programmes and packet instructions tend to write it in seconds, which is why it gets searched that way, while clocks and calendars prefer the fraction. Nothing about the countdown or the alarm changes either way.
What happens if I reload the page part way through?
The countdown survives it. Timer state is kept in the browser rather than on a server, so a refresh, an accidental back button or a closed lid picks up where the clock actually is, not where the page last drew it. Nothing is uploaded and nothing is fetched back to make that work.