Twenty-two breathing affirmations to calm your body — one line per exhale, for the fastest way down from panic.

Breathing is the only part of the stress response you can operate by hand. Heart rate, adrenaline and racing thoughts do not take instructions; the breath does, and the rest follows it down.
These twenty-two affirmations are built to be paired with an exhale. Say the line as you breathe out, slowly, and let the sentence set the length of the breath rather than the other way round.
The mechanism worth knowing: a long exhale engages the parasympathetic nervous system, which is the body's own brake. Four counts in, twenty-two or more out, for a couple of minutes, reliably lowers arousal in most people.
So say one line per out-breath and let it be slow enough to feel slightly unhurried. If you finish the sentence and still have air, you were rushing — start again a little slower.

1. “My breath is calm and slow.”

2. “I breathe my way through my worries.”

3. “I am more calm with each deep breath I take.”

4. “I take deep, calming breaths.”

5. “Each breath is like a refreshing wave that cools me down and helps me to relax.”

6. “I allow myself to breathe and relax.”

7. “I take deep breaths to bring peace into my body.”

8. “All I need to do right now is breathe.”

9. “I take life one day, one step, and one breath at a time.”

10. “Regardless of what is happening around me, I create inner peace with each breath.”

11. “I breathe deeply when I feel stressed.”

12. “I feel the stress leaving my body as I breathe.”

13. “Breathing helps me heal.”

14. “My breathing is relaxing my mind and body.”

15. “With every breath, I release the anxiety within me.”

16. “I take deep breaths to alleviate my stress.”

17. “I breathe in peace and breathe out peace.”

18. “I breathe in relaxation, I breathe out tension.”

19. “I take deep breaths and maintain my composure always.”

20. “I take a deep breath when I am feeling stressed.”

21. “I breathe in the energy of peace.”

22. “I relax my mind and body with deep, slow breathing.”
Usually one to three minutes of a long, steady exhale. If nothing has shifted after five, the breathing is probably too fast or too shallow rather than ineffective.
Four in, six out is a good default. The specific numbers matter less than the exhale being clearly longer than the inhale.
That happens, particularly with panic or a history of trauma, and it usually means the breaths are too big. Try smaller breaths with a longer pause at the end instead of deeper ones.
Yes, and "All I need to do right now is breathe" is the one to memorise. Panic attacks peak and pass regardless; the breathing shortens the peak and gives you something to do while it does.