Interval Timer
Alternate work and rest intervals for HIIT, Tabata-style training, and circuit rest.
WORK
Round 1 / 8
00:40
How to use
Set work seconds, rest seconds, and number of rounds. The timer switches phases automatically and beeps on each change.
FAQ
- Default Tabata? Preset is 40s work / 20s rest × 8 — edit fields for your protocol.
- Skip rest? Set rest to a minimum value if you need shorter gaps.
- Warm-up? Run a separate countdown before starting intervals.
- Track heart rate? Pair with heart-rate zone tools for intensity targets.