Once you have mastered the timing and the sound, the next thing is to concentrate on losing the pauses at full inspiration and at full expiration. Try to imagine a large pendulum in a clock. As the pendulum reaches the full sweep at one side of its swing it stops momentarily before swinging back. You can’t actually see it stop of course, but this momentary pause is exactly the pause you are trying to build into your relaxation breathing. We will call this breathing technique pendulum breathing.
At first the same-sound breathing and the constant swish of air through the chest seems highly unnatural. Really it is very natural, but you are not yet used to it. Once the four-second, constant intensity, almost continuous air exchange is learned you are well on the way to mastering the breathing side of the relaxation technique, and your body will start to respond to this.