Short work, almost no rest, heart rate pinned from the opening round — 30/10 has the relentless feel of a stretched-out Tabata. Ten seconds is barely a pause, just enough to reset your stance before the next thirty seconds of work, and the whole session is done in 6:30. Reach for it when you want maximum sweat in minimum time.
The tiny rest rewards movements you can drop straight into — high knees, mountain climbers, jump rope, air squats — so it makes a natural circuit, or a finisher bolted onto the end of a strength day when you have six minutes and want them to hurt. Keep the first rounds honest: a fast start borrows speed from the last three. Run all ten as loaded, or open the editor to add a warmup or ease the rest while you adapt.
Equal work and recovery — the dependable 1:1 where the last round still matches the first. The cardio base you’ll actually come back to.
All-out efforts with a full walk to recover between them. One for the track, a hill, the bike, or the rower.
Work-heavy, recovery-light — sustained minute-long pushes for building an engine that holds up under fatigue.
The 2:1 workhorse of conditioning circuits and bootcamps: long efforts, short rest, fatigue stacking as you go.
Minimal-rest conditioning that puts the heart rate up early and keeps it there. Pace it to last, not to peak.
The bootcamp class clock — station-friendly rounds where the rest is just long enough to rotate.
An easy on-ramp to interval training: short work, real rest, every round at the same honest effort.
The hub’s toughest ratio: a near-minute of work against a single breath of rest. A grinder for the patient.