The breathing rhythm at the beginning of the exercise may feel a bit quick to most of us (it's equivalent to 11 breaths/minute).
What we usually suggest is that you launch the 20 minutes cycle, and wait a bit before starting to breathe in rhythm with the light.
This way, you can skip the fast breathing part of the beginning, and start the exercise when you feel comfortable with the breathing pattern!
How to select the desired mode:
tap the touchpad once for the 8-min mode
tap the touchpad twice for the 20-min mode
You can also switch to the 20-minute mode during the 8 minute-mode (if you want to avoid starting the exercise again from scratch).
☞ To do so, tap the touchpad twice during the exercise.
Set the 20 minutes mode: