Tabata Timer
The Tabata protocol is 20 seconds of all-out work followed by 10 seconds of rest, repeated for 8 rounds — about 4 minutes total. This timer follows that structure exactly, with editable intervals so you can scale it.
Get ready
Adjust the protocol below, then press Start. A beep marks each phase change.
How the Tabata protocol works
Tabata training comes from a 1996 study by Izumi Tabata and colleagues at the National Institute of Fitness and Sports in Tokyo. Speed-skating athletes alternated 20-second bursts of maximal-intensity exercise with 10 seconds of rest for 8 rounds (4 minutes total, plus warm-up). The study group improved both aerobic (VO2 max) and anaerobic capacity more than a steady-state control group.
Two things make a Tabata a true Tabata rather than generic HIIT: the exact 20/10 second split, and working at genuinely maximal intensity. If you are pacing yourself, it becomes an interval workout — still useful, but not the studied protocol.
Common uses: bodyweight circuits (burpees, mountain climbers, squats), stationary bike sprints, kettlebell swings. Beginners usually scale to fewer rounds; the timer lets you set 4 or 6 rounds instead of 8.
FAQ
Is 8 rounds mandatory?
The studied protocol is 8 rounds (4 minutes). Starting with 4-6 rounds is a common way to build up; set the rounds field to match.
What counts as 'all-out'?
Intensity you could sustain for about 20 seconds but not 40 — a 9-10 on a 1-10 effort scale. Sub-maximal work turns Tabata into regular HIIT.
How long should the rest be?
The studied rest is exactly 10 seconds. It is intentionally short; that is what makes the protocol demanding.
Can I do Tabata every day?
Most programming limits true maximal-effort Tabata to 2-4 sessions per week with recovery days between, because the intensity is high. This is a planning aid, not medical advice.
Interval timing is a training aid, not coaching advice. Warm up, scale work/rest to your fitness level, and stop if you feel pain, dizziness, or shortness of breath. Verify any clinically relevant exercise plan with a qualified professional.