Advanced HIIT workouts combine high total volume, long running intervals and very little rest. They assume a solid aerobic base, reliable technique under heavy fatigue, and enough experience to judge when to push and when to back off mid-session. These are the longest and most demanding workouts in the library.
6 free workouts · bodyweight only · no account required
Run any of these on a proper interval timer with audio cues — free in the WODR iOS app.
Get the free appNot more complicated — harder. The movements remain the same bodyweight staples used throughout the library; what changes is the amount of them and how little recovery sits between. Sessions at this level routinely pair 800m to 1200m runs with high-rep bodyweight blocks, which is a combination that exposes any gap in aerobic conditioning immediately.
At this volume, the training itself is rarely what caps progress. Sleep, nutrition and the spacing of hard sessions do. Stacking advanced workouts on consecutive days reliably produces a plateau, and often a regression — the adaptation happens during recovery, not during the session that triggered it.
Two to three genuinely hard sessions a week, with easier work or full rest between them, produces more progress over a training block than five maximal attempts.
Advanced For Time workouts can run long when things go badly, and grinding well past your intended finish is a reliable way to accumulate fatigue with no matching training benefit. Decide the cap before you start. Hitting it and recording partial work is a legitimate result and a better input for planning the next block than an unbounded slog.