After a time you may be able to originate pressure movements of your own. One of my friends writes that he has used a similar idea associated with a vibratory motion. He slightly agitates the hand in different directions while pressing inwards. This is well worth a trial, and it partakes very much of the nature of massage. Another good practice is to inhale a deep breath and then while holding this breath apply pressure all along the central portion of the abdominal region, from the breastbone downwards, from ten to twenty times. Then, without exhaling the breath, draw in all the additional air you can and repeat the pressure movements six to twelve times, after which you may be able to take in still more air. One should be careful not to carry this holding of the breath too far. At the first signs of discomfort the breath should be exhaled quickly.