Effect of A Multimodal Exercise Intervention on Chemotherapy Uptake in Newly Diagnosed Pediatric and AYA Sarcoma Patients

This study investigates whether a structured exercise program during chemotherapy helps young cancer patients (teens and young adults with sarcoma) complete more of their planned chemo doses, and improves their physical fitness and quality of life. **You may be eligible if...** - You are between 12 and 39 years old - You have been diagnosed with sarcoma (a cancer of bones or soft tissues) - You are starting or have recently started (within the past 90 days) your first round of chemotherapy - You can read and understand English or Spanish - You have not been regularly exercising (less than 90 minutes of moderate exercise per week) - Your cancer care team approves your participation **You may NOT be eligible if...** - You require supplemental oxygen - You cannot walk two city blocks without assistance (other than a cane) - You have unstable bone metastases (cancer spread to bones in a way that makes exercise risky) - You started chemotherapy more than 90 days ago - You have a severe medical or psychiatric condition that prevents participation Talk to your doctor to see if this trial is right for you.