
Alternate hard work bursts with short recovery. Tune the work-to-rest ratio and round count to your session.
3 sets, 0:40 work / 0:20 break. Optionally, include warm-up and cool-down intervals, or start with an additional low intensity interval.
Even work and rest. Ten rounds of 0:30 hard, 0:30 easy. A reliable cardio base session for any movement.
Eight all-out sprints with a 1:00 walk between each. Built for outdoor running, the bike, or rower.
Six rounds of 1:00 hard with 0:30 active recovery. Sustained efforts for engine-building.
Rotate through named exercises with optional breaks. Stations of any duration.
Back-to-back HIIT blocks — every round of one exercise, then on to the next.
Simple timed rounds with breaks. Boxing, MMA, sparring.
Build any interval sequence from scratch, one by one.
Stack other timers into a multi-block session, cycled as a whole.

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