Pick a rhythm and follow it for a moment.
These are simple patterns you can follow. If one feels uncomfortable, switch to another or pause.
Inhale, hold, exhale, hold — each for 4 seconds.
Inhale for 3, exhale for 6 — a gentler pace.
Inhale 4, hold 7, exhale 8 — slower and deeper.
Inhale and exhale for the same count — smooth and balanced.