Blowing exercise:

Inhale, fill your lungs and nasal cavity with air; close your mouth and pinch your nostrils shut with your index finger and thumb. Blow slowly out through your closed nostrils and then swallow air. You should feel your ear drums popping. Repeat two to three times. (Fig. 4.33) Do not blow too hard; they can get hurt. You must do every exercise gently for the most benefit.