Tabatatwenty on, ten off, eight times

A Tabata is eight rounds of twenty seconds of work separated by ten seconds of rest. Four minutes end to end, including the rests. Unlike EMOM or AMRAP it isn't an acronym: it's a surname, from the Japanese researcher whose work the interval structure is named after.

That naming matters more than it sounds, because the name travelled and the protocol didn't. What made the original interesting was not the clock. It was the intensity: work efforts far above the pace you could sustain aerobically, performed on a cycle ergometer where that intensity can actually be produced and measured. Twenty on and ten off with any movement at any effort borrows the timing and leaves the part that did the work behind.

The ten-second rest is the entire design. It's long enough to stop moving and short enough that nothing meaningful recovers, so each round starts more depleted than the last. The oxygen debt accumulates rather than clearing, which is why the fourth minute of a real Tabata is a different experience from the first.

The measure of a Tabata is consistency, not total output. Count the reps you complete in round one and treat that as your target for all eight. If round one gives you twelve and round eight gives you five, you didn't do a hard Tabata. You did one hard round and seven rounds of fading, which is a different and much less useful stimulus. Our own seeded Tabata carries the instruction directly: count reps in round one, then chase that number each round.

Movement choice is the whole game. It has to be something you can drive hard with no technical thought and no setup, from a standing start, with a rep that's identical at second one and second nineteen. Air bike, echo bike, rower, burpees, and not much else. The moment a movement requires you to think, the twenty seconds is spent thinking.

Four minutes is short enough that people naturally stack them. Three Tabata blocks with different movements is a twelve-minute session, and that's a common and reasonable way to run it, but it's three protocols rather than one.

Take our seeded air bike Tabata: eight rounds of twenty seconds sprinting, ten seconds off, four minutes total, scored in calories. Round one at full effort might give you nine calories. The honest target for the remaining seven rounds is nine. What actually happens on a first attempt is 9, 8, 7, 6, 6, 5, 5, 4, which totals fifty and feels dreadful. The disciplined version is 7, 7, 7, 7, 7, 7, 6, 6, which totals fifty-four, feels worse in a different way, and is a substantially better piece of training. Your score is the lowest round, not the sum. That's the whole read. Anyone can produce one good twenty-second effort. The protocol is asking whether you can produce eight, and the honest answer on a first attempt is usually no.

Tabata: 8 × (20 sec Assault Bike sprint) + 10 sec rest

The twenty and the ten are fixed in the timer rather than read from the prescription, because a Tabata that isn't twenty and ten isn't a Tabata. The player counts the work down, flips into rest by itself, and flips back. There's nothing to tap, and the rest cannot be skipped, which is deliberate: skipping the ten seconds is skipping the protocol.

The current round is labelled as an interval rather than a round, and each completed twenty-second effort is logged as its own split so the record shows eight entries rather than one four-minute block. On the final rest the player says so explicitly, so the last ten seconds don't feel like a mistake.

A multi-station Tabata authored as several four-minute blocks is expanded into its real interval count from the prescribed duration, and the movements rotate one per interval. So a twelve-minute three-station Tabata runs as twenty-four intervals with the right movement showing on each, rather than as three untimed lumps you have to track yourself.

Build a plan and Fire Your Coach will schedule the structure, run the clock, and record what actually happened round by round, so next time the prescription starts from your real numbers.