In some very rare cases participants have reported variations in their/their child's behaviour and mood, this is generally at the start of the program within the first few weeks. If the difficulties that you or your child are experiencing are related to the exercises we wouldn’t expect them to continue much longer, although people do respond differently. In our experience if these changes are a result of the program it can be seen that the exercises are having an impact. It is important to continue with the exercises throughout this period, however if you do have any concerns then please consult your doctor.