Inclusion Criteria:

- Age 18 to 75 years old.

- Have received a clinical diagnosis of post-acute sequelae of SARS-CoV-2 (PASC)/long
COVID syndrome using the criteria specified by Thaweethai, et al., 2023 (JAMA). This
symptom checklist provides a score based on the number and severity of symptoms. An
individual with a score >12 is classified as having PASC.

- Currently experiencing Fatigue/Brain Fog as assessed with the Post-COVID symptom
checklist and the PedsQL questionnaire.

Exclusion Criteria:

- Neurological disorders including, but not limited to, stroke, head injury, epilepsy,
seizures, brain tumors, brain surgery, Parkinson's Disease, or any other
neuromuscular disease (self-report).

- Diagnosed history of severe psychiatric diseases such as depression and
schizophrenia (self-report).

- Congestive heart failure.

- Peripheral artery disease with claudication.

- Cancer.

- Pulmonary or renal failure.

- Unstable angina.

- Uncontrolled hypertension (more than 190/110 mmHg).

- Severe aphasia.

- Orthopedic or pain conditions.

- Have had exposure to metal or metal implants, due to the hazardous effects of the
magnetic field.

- If on immunomodulatory therapy, they must have been on that therapy for at least 6
months before the start of the study.

Healthy age- and sex-matched controls for PASC - Exclusion criteria: Participants with a
history of any of the following will be excluded from the study:

- Hospitalization due to SARS-CoV-2 infection.

- Neurological disorders including, but not limited to, stroke, head injury, epilepsy,
seizures, brain tumors, brain surgery, Parkinson's Disease, or any other
neuromuscular disease (self-report).

- Diagnosed history of severe psychiatric diseases such as depression and
schizophrenia (self-report).

- Congestive heart failure.

- Peripheral artery disease with claudication.