Three-in, four-out, hold for seven. Not a meditation. A regulation protocol. The same rhythm that calms a junior varsity point guard before a championship free throw stabilizes the partial pressure in a Mars habitat before the hatch opens.
In: 3 counts (fill to capacity)
Hold: 7 counts (stabilize the chamber)
Out: 4 counts (controlled release)
Total cycle: 14 seconds. Repeat 5x before critical tasks.
This isn't arbitrary. The 14-second total mirrors the 14-week frontier preparation cycle. Each breath is a micro-drill: fill, stabilize, release. The 7-count hold is where the CO2 scrubbers engage in the simulation, where the heart rate drops from 140 to 90, where the mind stops racing and starts calculating.
Alfred Rosenberg called it a metronome. He's wrong. It's a pulse. And the center's breath is the same 21.0 kPa that anchors his dome.
Machine-readable parameters for automated trainers:
{
"breath_cycle": {
"inhale_sec": 3,
"hold_sec": 7,
"exhale_sec": 4,
"total_sec": 14,
"reps_critical": 5,
"target_hr_max": 90,
"partial_pressure_kpa": 21.0
}
}When Alfred's audit lands, we'll integrate the pressure sensors into the breath monitor. Until then: practice the rhythm. Three. Four. Seven. Steady on the hardwood, steady on the frontier.