Studies in pediatric oncology have shown a positive effect of physical activity on disease-and treatment-related side effects. Although several reviews have approved the benefits of therapeutic exercise for adult cancer patients, no systematic review exists summarizing the evidence of physical activity in pediatric oncology. We identified a total of 17 studies using the PubMed database and Cochrane library. To evaluate the evidence, we used the evaluation system of the Oxford Center for Evidence-Based Medicine 2001. The findings confirm that clinical exercise interventions are feasible and safe, especially with acute lymphoblastic leukemia (ALL) patients and during medical treatment. No adverse effects have been reported. Positive effects were found on fatigue, strength, and quality of life. Single studies present positive effects on the immune system, body composition, sleep, activity levels, and various aspects of physical functioning. Child-specific aspects such as cognitive abilities, growth, adolescence, and reintegration into peer-groups, school, and sports have barely been taken into consideration. The evidence for exercise interventions in pediatric oncology is rated level "3. " Although the results are very promising, future research of high methodological quality and focusing on child-specific aspects is needed to establish evidence-based exercise recommendations, particularly for childhood cancer patients.A s a result of improved treatment regimes in pediatric oncology, the survival rates of children with cancer have risen to ~80% for 5-y survival (1-4). Therefore, the population of childhood cancer survivors is constantly growing. Despite these positive developments, childhood cancer is associated with a wide spectrum of various disease-and treatment-related side effects that may develop into chronic diseases and therefore result in long-term consequences. A negative impact on social, psychological, and physiological levels can be observed. Inactivity (5-7), impaired cardiopulmonary and musculoskeletal function, as well as reduced motor performance levels (8,9) and cognitive abilities (10) have been detected. Current studies also examined a negative impact on psychological well-being, satisfaction, and social functioning (11). Taken together, an impaired quality of life can thus be determined (8,12).During the past few years, several studies have generated first hints describing holistic, positive effects of clinical exercise interventions in pediatric oncology. First results present an association between increased physical activity levels in childhood cancer patients and an improvement in quality of life (13). In particular, physical functioning is increased, anxiety is reduced, and social integration is encouraged (14). Considering the fact that physical activity plays a vital role in the physiological and psychosocial development of children, therapeutic exercise in pediatric oncology is particularly important. However, there is still a lack of comprehensive and evidence-based data in the field o...
The exercise intervention was beneficial in terms of motor performance, level of activity, and emotional well-being. As such, this study provides support for group-based exercise as a potential strategy to improve these outcomes after inpatient medical treatment.
Most scientific studies regarding physical activity in cancer patients involve breast cancer patients. It is apparent that physical activity during medical treatment and aftercare is not only feasible and safe but also effective. Current studies clearly show that regular and specific endurance and/or resistance training can reduce a number of side effects caused by medical treatment. Among others, improvements in physical performance, body composition, and quality of life as well as a reduction in fatigue, have been observed. Since inactivity appears to exacerbate lymphedema, patients with lymphedema are also encouraged to exercise. Few studies have been carried out regarding physical exercise in metastatic patients. However, experts in the field also recommend regular physical activity for patients with advanced-stage breast cancer.
Exercise has been proven to reduce the risk and progression of various diseases, such as cancer, diabetes and neurodegenerative disorders. Increasing evidence suggests that exercise affects the cytokine profile and changes distribution and function of tumor-competitive immune cells. Initial studies have shown that different exercise interventions are associated with epigenetic modifications in different tissues and cell types, such as muscle, fat, brain and blood. The present investigation examines the effect of an intense endurance run (half marathon) on global epigenetic modifications in natural killer (NK) cells in 14 cancer patients compared to 14 healthy controls. We were able to show that histone acetylation and NKG2D expression, a functional NK cell marker, were elevated for at least 24 h after the run. Thus, this is the first study to present a potential mechanism of how exercise may impact NK cell activity on the subcellular level. Further studies should focus on epigenetic mechanisms and dose-dependent effects of exercise.
Although survival rates in childhood cancer have distinctly improved, pediatric cancer patients often experience various disease- and treatment-related side effects with long-term consequences. Despite current studies investigating inactivity and limitations in physical functioning and quality of life in pediatric cancer patients, only little information regarding specific deficits in physical functioning and quality of life has been available until now. No study has yet analyzed these parameters from a global perspective and then identified specific deficits in a mixed childhood cancer population. Within this cross-sectional pilot study, motor performance and quality of life of 26 pediatric cancer patients were assessed after inpatient medical treatment, using standardized motor test batteries (MOT 4-6; DMT 6-18) and a quality of life questionnaire (KINDL®). Reference data have been mainly provided by the German "Children and Young People Health Survey" (KiGGS). Patients achieved lower motor performance scores (p = .000) (more than 27% below the average of healthy peers). Specific deficits were identified in motor speed and motor control (4-6 years), as well as in endurance, strength and coordination under time pressure (6-17 years). In terms of quality of life, no significant differences were examined compared to healthy children of the same age. The results of this study confirm that children with oncological diseases frequently have specific motor problems. Future research in pediatric oncology must investigate the impact of targeted, individualized exercise interventions addressing these specific deficits.
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