Exercise to Help Teens with Anxiety

Inclusion Criteria: 1. Provision of signed and dated informed consent form 2. Stated willingness to comply with all study procedures and available for the duration of the study 3. 14-17 years of age upon enrollment 4. Right-handed 5. In good general health as evidenced by medical history 6. Adolescent and parent/guardian are English-speaking, as study assessments are in English 7. Availability of a parent or legal guardian who is willing to provide consent and attend all study visits Exclusion Criteria: 1. Traumatic brain injury with ongoing symptoms 2. Sensory (e.g., hearing) or physical (e.g., motor, balance) impairment or significant developmental delay 3. MRI participants: MRI contraindication (e.g., braces, implants, claustrophobia) 4. Any condition that would contraindicate blood draws (e.g., hemophilia, sickle cell) 5. Past or current diagnosis or presence of likely neurological disorder (e.g., epilepsy), psychotic disorder (e.g., schizophrenia, schizoaffective disorder), or bipolar disorder 6. Severe/unstable medical condition (e.g., diabetes, rheumatoid arthritis) 7. Current (past 1-month) use of cannabis or cannabinoid products including CBD unless willing to stop for at least 4 weeks prior to entering the study 8. Currently pregnant, lactating, or positive pregnancy test at screening visit 9. Current homicidal thoughts or suicide attempt in the past year 10. Current suicidal thoughts requiring immediate intervention 11. Concurrent use (past 6 weeks) of oral contraceptives 12. Diagnosed or probable substance use disorder (past 1-month) 13. Positive drug test at baseline visit (e.g., THC, cocaine) 14. Moderate/severe drug or alcohol use in the past 8 weeks 15. Current or recent (past 1-month) COVID-19 diagnosis or febrile illness 16. Treatment with investigational drug or intervention (past 1-month) 17. Current smoker, vaper, or tobacco or nicotine use (past 1-month) 18. Ongoing exposure to abuse