Methods: This is a single-site, randomized trial of individualized yoga for fatigue. Participants are children 8-18 years of age receiving intensive chemotherapy for cancer or undergoing HSCT who are expected to remain in hospital for 3 weeks. Participants will be randomized to individualized yoga or to the iPad activity control program. The intervention is an individualized yoga program in which intensity level may change with each session. The control program consists of visits in which games, music, movies or books on a study-supplied iPad will be offered. Yoga sessions will be conducted once a day during the regular work week and will be led by a trained yoga teacher. In the control arm, the yoga teacher will visit once a day and will offer children games, music, movies or books on an iPad. Fatigue and quality of life will be measured by the parent at baseline, on day 10 and on day 21. For subjects who remain hospitalized on day 21, they will be offered the alternate arm for one week to promote retention.