What is the Tabata protocol, exactly?

It's a high-intensity interval training format developed by Dr. Izumi Tabata in the 1990s: 20 seconds of maximum-effort work followed by 10 seconds of rest, repeated for 8 rounds — a total of just 4 minutes. Studies on the original protocol showed it improved both aerobic and anaerobic fitness, which is why it's remained popular well beyond the original research.

Can I use this timer for workouts other than Tabata?

Yes — the work, rest, and round settings are fully adjustable, so you can set it up for EMOM-style work, longer circuit intervals, or any other work/rest structure, not just the strict 20/10 ratio.

Why is there a prep countdown before the first round?

It gives you time to get into position, grab equipment, or just mentally prepare before the first high-intensity interval starts, so you're not caught off guard mid-setup when the clock hits zero.

Does the timer keep running if I switch tabs or lock my phone?

The countdown is based on the actual system clock (not just a simple tick counter), so it stays accurate even if the browser throttles background tabs — when you return, the displayed time will have caught up correctly rather than falling behind.

TABATA TIMER

A configurable work/rest interval timer for Tabata-style HIIT workouts.

Ready

0:10

Settings

Prep (sec)Work (sec)Rest (sec)Rounds

How to run a Tabata workout

1
Set your prep, work, and rest durations, and the number of rounds — the classic Tabata protocol is 20s work / 10s rest × 8 rounds.
2
Hit Start. A prep countdown gives you time to get into position before the first work interval begins.
3
Follow the color-coded ring through each work and rest interval until all rounds are complete.

Questions

What is the Tabata protocol, exactly?: It's a high-intensity interval training format developed by Dr. Izumi Tabata in the 1990s: 20 seconds of maximum-effort work followed by 10 seconds of rest, repeated for 8 rounds — a total of just 4 minutes. Studies on the original protocol showed it improved both aerobic and anaerobic fitness, which is why it's remained popular well beyond the original research.
Can I use this timer for workouts other than Tabata?: Yes — the work, rest, and round settings are fully adjustable, so you can set it up for EMOM-style work, longer circuit intervals, or any other work/rest structure, not just the strict 20/10 ratio.
Why is there a prep countdown before the first round?: It gives you time to get into position, grab equipment, or just mentally prepare before the first high-intensity interval starts, so you're not caught off guard mid-setup when the clock hits zero.
Does the timer keep running if I switch tabs or lock my phone?: The countdown is based on the actual system clock (not just a simple tick counter), so it stays accurate even if the browser throttles background tabs — when you return, the displayed time will have caught up correctly rather than falling behind.