Anything that has the power to help you change your brain in positive ways can also have negative results. You can hurt yourself swimming or jogging or working out at the gym. The brain-trainer approach is to look at the brain in detail—see what activation patterns are in place and identify those most likely to block the desired changes. The Whole-Brain training plan works all of these in a circuit, so no one site or system is over-trained and the whole system changes. Certainly a person may experience a release of emotions during or after a session—tears or anger—as a part of letting go of old patterns, but these responses generally last 8-12 hours or less. And the client always has the right to stop an exercise if it doesn’t feel good. Returning to the same training 5 sessions later in the next circuit, that same exercise can turn out to be one of the most useful. The brain-trainer approach doesn’t “push” the brain, and it focuses on flexibility and stability, so it is very unlikely to result in discomfort or even a temporary negative response.