Inclusion Criteria

- Male and female patients ages 6 to less than 18

- Patients who have experienced any form of cranial insult related to cranial trauma,
or to a tumor or it's treatment (i.e. surgery, radiation, and/or chemotherapy)

- Patients who are at least one year out following therapy for their tumor

- Patients who have severe cardiovascular dysfunction (for example cardiomyopathy,
congestive heart failure (NYHA Class III or IV), unstable angina, sustained
ventricular tachycardia, ventricular fibrillation) will be excluded

- Patients with severe neurologic handicaps which preclude normal physical activity
will be excluded.

- Patients confined to bed and those patients who are wheelchair bound which prevents
them from activities of daily living or normal physical activity, i.e. walking, will
be excluded from the trial

- Your child must be greater than 120% of their ideal body weight for their height or
have a body mass index that is greater than or equal to 27.