Build work/rest rows and rounds; Start runs the sequence in order with a beep on each phase change.
Settings
Total: 04:00
—
Elapsed: 00:00|Remaining total: 00:00
How the HIIT interval timer works
Real-world HIIT rarely looks like a perfect spreadsheet—coaches mix short bursts, moderate work, and different rests. This builder lets you stack multiple work/rest rows inside one round and repeat that round several times, instead of locking you into a single fixed template like classic Tabata.
Add one or more rows with work seconds and rest seconds. Order them logically: for example 40s erg hard, 20s easy paddle, then 30s goblet squats, 30s walking recovery. Each step is explicit; when you press Start the timer executes rows in order and beeps on every phase change.
After the last row in a round completes, the tool can repeat the entire round for the repeat count you configured. That mirrors circuit classes where one lap is one “round” and you want three laps back-to-back.
Audio matters because you are often looking at a barbell, rope, or partner—not the screen. Interact with the page before Start to unlock browser audio; on iPhones double-check the silent switch.
Programming tip: start conservative the first week and track heart rate or RPE. If the final station always fails, trim work intervals by 5–10% or lengthen the rest between rounds if the UI supports it.
Warm-ups: many coaches add a longer first “work” row that is intentionally easy cardio, then the real intervals. That models a warm-up without a separate timer—meaning is up to you, not the software.
Compared with the Tabata page: Tabata optimizes the canonical 20s/10s × eight format. This page is for custom density—strength endurance, mixed circuits, or home bodyweight loops.
Technique before volume: if form breaks down, reduce load or pick an easier regression. The timer sets tempo; it does not remove injury risk.
HIIT timer FAQ
How is this different from the Tabata timer?
Tabata is fixed 20s / 10s × 8. The HIIT builder lets you define arbitrary times and longer sequences per round.
Can I mix several intervals in one round?
Yes — compose the round from multiple rows before repeating the whole round.
Is there a warm-up?
Model it by adding a longer first “work” step or an extra rest row at the start of your sequence.
How do I keep quality between rounds?
Insert a longer rest row at the end of the lap before repeating, or reduce stations until pacing feels sustainable.
Is it beginner friendly?
Yes—with shorter work and longer rests. Progress intensity week to week rather than jumping to elite protocols on day one.