Figuring out how often to do CO₂ and O₂ tables is what separates steady progress from burning out. Tables are a real physiological stress, not a daily habit to grind — and the adaptation happens during recovery, not during the session. For most spearfishers the answer is one to three table sessions a week, never two types on the same day. Here's how to schedule them, a sample week and a four-week build, the signs you're overdoing it, and how to taper around dive trips.
How Many Table Sessions Per Week
The consensus across freediving instructors is modest: one to three tolerance sessions a week is the sweet spot for most divers, and one or two is plenty if you're also diving regularly. More than that and you tend to go stale — the holds feel worse, not better, because you're never fully recovering between sessions.
The single hard rule sits underneath all of this: never run a CO₂ table and an O₂ table on the same day. Each is a distinct, serious stress, and stacking them trains neither well. The why is covered in CO₂ vs O₂ Tables: Which Should You Train?, and both fit into the bigger picture in Breath-Hold Tables: The Complete CO₂ & O₂ Guide.
A Sample Training Week
A balanced week alternates the two table types with rest between them:
| Day | Session |
|---|---|
| Monday | CO₂ table (dry, can be solo) |
| Tuesday | Rest |
| Wednesday | O₂ table (with a spotter) |
| Thursday | Rest |
| Friday | CO₂ table |
| Weekend | In the water, or off entirely |
If you only want two sessions, drop the Friday CO₂ table. If you dive most weekends, treat the dives as your O₂ stimulus and keep the dry week to one or two CO₂ tables.
A Four-Week Build
Tables respond best to a wave of effort followed by a lighter week, the same way strength training does. A simple monthly cycle:
| Week | Load | Focus |
|---|---|---|
| 1 | Moderate — 2 sessions | Ease in; re-establish the rhythm |
| 2 | Build — 3 sessions | Slightly harder holds or tighter rests |
| 3 | Peak — 3 sessions | Hardest tables of the month |
| 4 | Deload — 1–2 easy sessions | Recover; let the adaptation settle |
After the deload week, re-test your max hold and rebuild your tables from the new number before starting the next cycle.
Why Recovery Drives the Gains
Tables don't make you better while you hold your breath; they make you better while you rest afterward. The session is the stimulus, and the adaptation — better CO₂ tolerance, a stronger dive reflex — is built in the day or two of recovery that follows. Cram the sessions too close together and you keep applying stress without ever banking the adaptation. Rest days aren't lost training; they're where the training cashes in.
Signs You're Overtraining
Back off when you notice any of these:
- Your holds are getting shorter or harder week over week, not easier.
- Contractions start much earlier than they used to.
- Persistent fatigue, poor sleep, or a higher resting heart rate.
- You dread the sessions, or your relaxation falls apart mid-table.
Fitting Tables Around Dive Days
If you're diving and training, let diving take priority. Keep hard O₂ tables away from big dive days — both deplete the same reserves — and use lighter CO₂ tables on the dry days in between to maintain tolerance without piling on fatigue.
Before a dive trip, taper: do your last hard table three or four days out, then keep only light CO₂ work until you travel, so you arrive fresh rather than fatigued. When you do want to push table difficulty, the variants in Advanced Apnea Tables: Hybrid, Ladder & Pyramid still live inside this same one-to-three-a-week budget.
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