Can aerobic exercise at the YMCA help Stress-Sensitive smokers kick the habit?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male and female participants ages 18-65 * Willing and able to provide informed consent, attend all study visits and comply with the protocol * Daily smoker for at least one year * Currently smoke an average of at least 5 cigarettes per day * Report a motivation to quit smoking in the next month of at least 5 on a 10-point scale. * Anxiety Sensitivity Index-3 score ≥ 23 (cut-off score to identify high AS individuals) * Sedentary as defined by moderate-intensity exercise less than 3 days/wk for at least 20 minutes each time * Medical clearance to participate in the protocol Exclusion Criteria: * Use of other tobacco products (including e-cigarettes) * A lifetime history of bipolar disorder, schizophrenia, psychosis, or delusional disorders; an eating disorder in the past 6 months; organic brain syndrome, mental retardation or other cognitive dysfunction that could interfere with capacity to engage in therapy; a history of substance or alcohol abuse or dependence (other than nicotine) in the last 6 months or otherwise unable to commit to refraining from alcohol use during the acute period of study participation. * Patients with significant suicidal ideation as determined by structured interview or who have enacted suicidal behaviors within 6 months prior to intake will be excluded from study participation and referred for appropriate clinical intervention. * Body mass index 40. We selected a BMI of 39.9 as the upper limit in order to screen out individuals with Class III obesity who might be more prone to musculoskeletal injuries than individuals with a BMI\<40.0). * Current use of any psychotherapy for smoking cessation not provided by the researchers. * Current use of any pharmacotherapy or psychotherapy for smoking cessation not provided by the researchers during the quit attempt, including Chantix, Zyban, and Nicotine Replacement Treatment.