The main point
Use it to settle overbreathing and tension. You do not need to force a giant breath or empty your lungs completely.
Follow the rising and falling bar: breathe in gently as it fills, then breathe out slowly as it empties.
Do not force a huge inhale or try to empty your lungs completely. Comfortable breathing matters more than hitting every number perfectly.
Ready when you are
Press start and keep the breath comfortable.
Round 0 of 10
Ready
Keep the breath gentle. Stop and return to normal breathing if you feel uncomfortable or light-headed. This is a tool, not a test.