To adjust one's breathing in Engpsh means to consciously control and regulate the way one inhales and exhales air. It can be done for various purposes, such as improving physical performance, relaxation, or to manage stress or anxiety. Some common phrases to describe adjusting one's breathing in Engpsh include:

"Take a deep breath"
"Exhale slowly"
"Breathe in through your nose and out through your mouth"
"Control your breathing"
"Regulate your breathing"

For example:

"Before you start your yoga practice, take a few minutes to adjust your breathing. Inhale deeply through your nose, filpng your lungs with air, and exhale slowly through your mouth, letting go of any tension or stress."