Hard is the premise
The one non-negotiable in HIT is intensity: each working set is carried to momentary muscular failure. If the set isn't hard, it isn't HIT — it's just exercise. Intensity is the stimulus that drives adaptation.
Brief follows from hard
There is an inverse relationship between how hard and how long you can train. A set to failure is exhausting; a workout of many sets to failure would be impossible to sustain at the required intensity. So HIT workouts are brief — a few compound movements, one working set each. The work is short because it's genuine.
Infrequent follows from both
A brief, brutally hard session demands significant recovery. Adaptation happens between sessions, not during them. Train again before recovery is complete and you undermine the intensity that defines the method. So HIT is infrequent — not because of laziness, but because recovery is the limiting factor.
The counter-position
Most training apps assume more is better — more days, more volume, more streaks. Failure Point assumes the opposite: train less, recover more, and make each set count. Brief, hard, infrequent — printed plain.