CO₂ tables

Train the burn

The urge to breathe isn't low oxygen — it's rising CO₂. Train your tolerance to it and the same breath holds twice as long.

co₂ table    hold 2:00, breathe 2:00, repeat
classic      8 holds, rest halves each round
pyramid      1–2–3–2–1, rest = hold time
weekly       2 sessions, never back-to-back

Never in the water alone

CO₂ tables are done dry, or with a buddy. Blackout doesn't warn you first.