What Is Tabata? The 20/10 Format and How to Time It

"Tabata" has become shorthand for any workout timed 20 seconds on, 10 seconds off. The name comes from a specific study, though, and what that study tested was a lot harder than most classes that borrow the name. This guide covers the original protocol, how the word is used now, and how to set a timer for it.

If you only need the timing, the interval timer runs work and rest periods for as many rounds as you set, with a sound at each change.

The original 1996 study

The format is named after Izumi Tabata, the lead author of a 1996 paper in Medicine and Science in Sports and Exercise. In his 2019 review of the method, Tabata writes that the workout itself was introduced by Kouichi Irisawa, then head coach of the Japanese speed skating team, and that his group's research compared it with other protocols the coach used.

Here is what the study did, according to the paper's PubMed record:

• Equipment: a mechanically braked cycle ergometer (a stationary test bike).
• Work and rest: about 20 seconds of exercise followed by 10 seconds of rest.
• Sets: seven to eight, and the session was exhaustive. Tabata's 2019 review defines the method as an intensity that exhausts the person during the 7th or 8th 20-second bout.
• Intensity: about 170% of each subject's VO2max, the highest rate at which their body could take up and use oxygen. That's well beyond a hard steady pace.
• Schedule: seven subjects trained 5 days a week for 6 weeks. The review explains that 4 of those days were the exhaustive sets, and the fifth was 30 minutes of steady cycling at 70% of VO2max followed by four sets that weren't taken to exhaustion.

After six weeks, the paper reports that VO2max rose by 7 ml per kg per minute and anaerobic capacity rose by 28%. A comparison group that did six weeks of moderate cycling (60 minutes a day at 70% of VO2max) improved VO2max but not anaerobic capacity. A follow-up paper from the same group in 1997 measured a session of 6 to 7 bouts of 20 seconds at about 170% of VO2max, with 10 seconds of rest between bouts, and concluded that it may tax both the aerobic and anaerobic energy systems almost maximally.

How "Tabata" is used today

In gyms and workout apps, "Tabata" usually means the timing pattern only: 20 seconds of work, 10 seconds of rest, 8 rounds, often with squats, burpees, or other body-weight moves. That's a fair use of the timing, but it isn't the same workout the study tested.

Tabata himself makes this point. His 2019 review says that among general exercisers, the exercise intensity "has not been emphasized; only the procedure of the training has been featured." It notes there isn't enough evidence yet on the effects of running and body-weight versions, and that walking on the same 20/10 schedule can't be expected to improve VO2max. A 2025 review by Tabata describes how the method has since been adapted for sport-specific training, cross training, and different groups of people.

So when a class calls a workout "Tabata," read it as "20/10 timing." Whether it does what the study found depends mostly on the intensity, not the clock.

Is Tabata always 4 minutes?

The common 8-round version takes 4 minutes on the clock: 8 rounds of 30 seconds (20 on, 10 off) is 240 seconds. If your timer stops after the last work period instead of running the final rest, it ends at 3:50.

The interval timer here works that way: it skips the rest after the last round, so the Tabata preset shows 4:00 total because that includes its 10-second warm-up. Set Warm-up to 0 and it runs 3:50.

The original protocol wasn't a fixed 4 minutes. Sets continued until the person couldn't keep going, which happened in the 7th or 8th set, so a session's hard part could end a little before the 4-minute mark. Warm-up and cool-down time aren't part of that count either. To time those separately, a five-minute countdown is enough for most people.

How to time a Tabata round

A Tabata timer is an interval timer set to 20 seconds of work, 10 seconds of rest, and 8 rounds, with a sound at each change so you never have to look at a clock mid-effort. To set one up:

1. Open the interval timer set to Tabata 20/10. It loads with 20 seconds of work, 10 seconds of rest, and 8 rounds.
2. Leave the 10-second warm-up to get in position, or set Warm-up to 0 to start straight away.
3. Press Start and listen for the cues.

Here's the full schedule, counted from the start of round 1. If you leave the 10-second warm-up on, round 1 starts 10 seconds after you press Start, so add 10 seconds to each time.

Every work period starts on a half-minute, so if you're using a wall clock instead, go on :00 and :30 and rest at :20 and :50.

Before you try it

The US Physical Activity Guidelines advise choosing activities that suit your current fitness level, and inactive people should "start low and go slow," building up gradually. If you have a chronic condition or symptoms, the guidelines say to be under the care of a health care provider, who can advise on the types and amounts of activity that suit you.

Key points

• Tabata timing is 20 seconds of work and 10 seconds of rest, usually for 8 rounds, which takes 4 minutes.
• The 1996 study used a cycle ergometer at about 170% of VO2max, with 7 to 8 sets taken to exhaustion.
• Most workouts called Tabata today copy the timing, not the intensity, and the evidence is weaker for those versions.

Questions people ask

Sources

• Tabata I, Nishimura K, Kouzaki M, et al. "Effects of moderate-intensity endurance and high-intensity intermittent training on anaerobic capacity and VO2max." Medicine and Science in Sports and Exercise, 1996;28(10):1327-30. PubMed, DOI
• Tabata I, Irisawa K, Kouzaki M, et al. "Metabolic profile of high intensity intermittent exercises." Medicine and Science in Sports and Exercise, 1997;29(3):390-5. PubMed, DOI
• Tabata I. "Tabata training: one of the most energetically effective high-intensity intermittent training methods." The Journal of Physiological Sciences, 2019;69(4):559-572. PubMed, DOI
• Tabata I. "Tabata training in perspective." Applied Physiology, Nutrition, and Metabolism, 2025;50:1-10. PubMed, DOI
• US Department of Health and Human Services, Physical Activity Guidelines for Americans, 2nd edition, Key Guidelines for Safe Physical Activity: health.gov. Accessed October 2026.