Childhood Cancer Survivors' Affective Response to Exercise

This study is investigating how adult survivors of childhood acute lymphoblastic leukemia (ALL) emotionally respond to exercise — and whether their feelings during physical activity (positive or negative) affect how willing they are to exercise regularly. This research is aimed at improving exercise programs for cancer survivors. **You may be eligible if...** - You are 18–39 years old - You were treated for acute lymphoblastic leukemia (ALL) as a child and are enrolled in the St. Jude Lifetime Cohort - You did not receive cranial radiation as part of your ALL treatment - You currently do not meet CDC physical activity guidelines (i.e., you exercise less than 150 minutes/week of moderate activity or 75 minutes/week of vigorous activity) - You are not currently pregnant (for women) **You may NOT be eligible if...** - You cannot read, speak, or understand English - You have an estimated IQ below 70 or significant cognitive issues - You have a heart or cardiovascular condition that makes stress testing unsafe - You are currently pregnant Talk to your doctor to see if this trial is right for you.