The brief
What this block builds
- A vicious cardio engine and punch output under fatigue.
- Focus: Cardio · output.
- 30 on, 30 off — the classic engine-builder on the heavy bag.
How the book works
- Ten pages. Four training weeks. One test.
- Every session runs itself with the built-in round timer — phone in your pocket, bell in your ears.
- Baseline: 5 rounds of the session on the next page, as a circuit.
Before you start
- No bag? Shadowbox it at full intensity — it still works.
