Ratio is the relationship between inhale, hold, and exhale lengths, written like 4-7-8.
In 📝Breathwork the ratio is how a pattern is named and dosed. A longer exhale usually settles; equal sides (a box) usually steady; a dropped hold makes the pattern easier. Numbers are a starting point, not a medical prescription. If the person cannot keep the ratio without bracing, it shrinks.
Clients feel the shape of the cycle. Dizziness or panic means drop a hold or shorten the longest phase. Chest pain is a stop.