Physical Activity and Health of Children With Cancer in Remission

Inclusion Criteria: * children aged 6-16 * remission from cancer * \>6 months after completion of all therapy Exclusion Criteria: * informed consent not given in writing * refusal of tests: blood, fitness, questionnaires or DEXA * locomotive handicaps * extreme fatigue, nausea, dyspnea * concurrent acute illness * recent (less than 3 months) hospitalization * documented (echocardiographic or nuclear medicine) decrease in cardiac function * abnormal blood tests: Hb \< 10 gr/dl, neutropenia \< 500/mm3, thrombocytopenia \< 50,000/mm3 * additional chronic health conditions unrelated to cancer (e.g. celiac disease, cerebral palsy, Down's syndrome)