Inclusion Criteria:  Otherwise healthy participants between the ages of 10 and 24 Actively on the waitlist for, or having completed the exercise program at the PPRC Comprehension of instructions Parental consent for minors Weight less than 250 lbs - limit of MRI table Clinical diagnosis of Chronic Widespread Pain  Exclusion Criteria:  Preventative medications and opioids Metallic implants that will pose harm to the subject (e.g., pacemaker) and/or affect the dat (e.g., braces) Significant medical disease (systemic or CNS). Active suicidality, psychosis, diagnosed eating disorders, and/or other severe clinically diagnosed neuro-psychiatric conditions Pregnant Claustrophobia