Basically, this is your body’s habit, which is the direct result of your brain’s habits. If you attempt to perform Brain Wave Vibration in this state, you could pull a muscle or cause some other injury in the body. Besides that, you will have a hard time feeling the vibrations in your body if circulation is blocked by tension. Before starting Brain Wave Vibration practice, relax your body by slowly turning your head left and right and rotating the shoulders forward and back. You can also do a few stretching exercises before you begin. As you start Brain Wave Vibration, make small, gentle movements and build up to more dramatic ones.
If you cannot breathe well because of asthma or cardiovascular problems
As you exhale, make a long “ahhh” sound while patting the chest to open up the airway. Focus on exhaling all air out of the lungs. You will feel a subtle vibration that spreads out from the chest to the whole body. Chest Twist Vibration (page 144) will be especially helpful to you.