Rehabilitation Including Structured Active Play for Preschoolers With Cancer.

The intervention group will participate in a six-month play-based physical activity intervention starting from their initiated treatment. The intervention combines hospital and home-based physical activity. Three days a week, there will be 45 minutes of group-based physical activity at the hospital during admissions or appointments at the outpatient clinic, supervised by an exercise professional or pediatric physiotherapist. Children who are isolated during treatment are offered supervised individual 45 min. training sessions 3 times a week as a substitute. During the other four days a week, or on days where the family is at home, the parents administer the play-based physical activity. At inclusion, the parents receive education and supervision on conducting play-based physical activity with their child in the hospital room or at home. They will receive inspiration material containing numerous different plays, games, and activities in different intensities.