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HIIT interval timer workflow

HIIT Interval Timer With Real Workout Structure

HIIT sessions need more than start-stop controls. untraind lets you build real interval structure: timed work, timed rest, loops, and training-method blocks that execute with clear cues and logging.

Workout editor view
Workout editor interval rest-scaling controls with duration, direction, and per-round resolved rest values
Runtime execution view
HIIT run screen with Tabata-style timed intervals, round progress, and explicit work-rest transitions

What this is

A structured interval execution flow for timed work-rest blocks, loops, and mixed conditioning templates.

What this unlocks

Tabata-ready countdown behavior plus composable blocks like EMOM, AMRAP, and For Time in one runtime.

Why and when to use it

Use it when you need strict interval timing but still want to mix multiple workout formats in one session.

Structured interval execution

From classic Tabata to mixed functional or CrossFit sessions, untraind keeps interval behavior consistent. You can combine timed countdown steps with EMOM, AMRAP, For Time, and EDT density zones in one template.

Timed intervals are explicit countdown states.

Build Tabata and HIIT blocks with timed exercises plus timed rest (for example 20s work / 10s rest) and run them with clear round context.

Build hybrid functional and CrossFit sessions.

One builder can combine HIIT intervals with EMOM, AMRAP, and For Time blocks, so mixed conditioning sessions stay coherent.

EDT is supported as a dedicated density mode.

Density Zone blocks run as fixed-time PR windows with alternating exercises and live set history, not as a generic stopwatch.

HIIT interval timer FAQ

Is this just a Tabata timer?

No. It supports Tabata-style intervals and broader HIIT structures with loops, timed rest, and composable training-method blocks.

Can I build Tabata, HIIT, and functional/CrossFit workouts in one builder?

Yes. Templates can combine timed interval blocks with EMOM, AMRAP, and For Time segments while keeping one consistent run flow.

How is EDT different from regular intervals?

EDT runs as a fixed density zone where you alternate exercises and log sets live to maximize reps in a time window.