Eva M. Zopf

Clinical exercise interventions in prostate cancer patients—a systematic review of randomized controlled trials

IntroductionUrinary incontinence, erectile dysfunction, fatigue as well as fears and depression rank among the most common complaints in patients with prostate cancer, resulting in a reduced participation in daily life and social isolation. Consequently, the quality of life of prostate cancer patients is strongly affected in a negative way. Numerous studies focusing on physical exercise interventions in prostate cancers patients demonstrate positive physiological and psychological effects. Our objective was to evaluate the evidence of randomized controlled studies which examined exercise during medical treatment and in the aftercare of a prostate cancer disease.MethodsTwenty-five randomized controlled trials regarding physical activities in patients with prostate cancer were obtained by systematic literature research (Medpilot). Twenty-one studies examined clinical exercise interventions during the phase of medical treatment (irradiation, pre- and/or post-op, androgen deprivation therapy) and four studies during the aftercare. In order to evaluate the evidence of the included studies, the evaluation system of the Oxford Centre for Evidence-Based Medicine was used. Within this systematic review, we differentiated between “supervised clinical exercise” and “non-supervised clinical exercise.”Results and discussionCurrent data suggest that incontinence, fitness, fatigue, body constitution, and also quality of life can be improved by clinical exercise in patients during and after prostate cancer. Studies were mostly ranked evidence level “2b.” Only four studies, all conducted during medical treatment, reached the level “1b.” It seems to be that “supervised exercise” is more effective than “non-supervised exercise.” For future research, further randomized controlled trials with high methodological quality need to be conducted in order to establish evidence-based recommendations particularly for prostate cancer patients.

Physical activity for patients undergoing an allogeneic hematopoietic stem cell transplantation: benefits of a moderate exercise intervention

An allogeneic hematopoietic stem cell transplantation (HSCT) can have profound and lasting adverse effects on a patient’s physical and psychological well‐being. So far, only few studies have investigated the effectiveness of physical activity over the entire inpatient phase of an allogeneic HSCT. Purpose: We performed a randomized controlled study to examine the influence of a controlled moderate exercise program starting parallel to chemotherapeutic conditioning and total body irradiation on the patient’s physical and psychological constitution. Patients and methods: Forty‐seven patients undergoing an allogeneic HSCT were randomly assigned to an exercise group (EG) or a control group (CG). While the EG took part in an endurance and activity of daily living‐training twice a day, the CG received the clinic’s standard physiotherapy program once a day. Results: Significant differences and/or trends in favor of the EG were observed regarding the primary endpoint endurance performance (P = 0.002), muscular strength (P = 0.022), fatigue (P = 0.046), and emotional state (P = 0.028) without posing an additional risk for the individual. Conclusion: The results show that the training program is feasible and seems to have positive influences on physical performance and quality of life in patients undergoing an allogeneic HSCT. However, further studies are necessary to confirm these results.

Exercise Intervention Studies in Patients with Peripheral Neuropathy: A Systematic Review

IntroductionPeripheral neuropathies (PNPs) encompass a large group of disorders of heterogeneous origin which can manifest themselves with sensory and/or motor deficits depending on the predominantly affected nerve fiber modality. It represents a highly prevalent disease group which can be associated with significant disability and poor recovery. Exercise has the potential to improve side effects of PNP.ObjectiveOur objective in this systematic review was to analyze exercise interventions for neuropathic patients in order to evaluate the possible benefits of exercise.MethodsThree independent reviewers used PubMed, MEDPILOT® (MEDLINE), Cochrane, and relevant reference lists to obtain the data. Relevant studies were graded according to the Oxford Levels of Evidence.ResultsEighteen studies (ten randomized controlled trials and eight controlled clinical trials) met all inclusion criteria. Three (diabetic) studies were ranked very high quality [1b (A)], nine high quality (four diabetes, one cancer, four others) [2b (B)], while six (four diabetes, two others) showed low quality (4/C). Current data suggests that exercise is a feasible, safe, and promising supportive measure for neuropathic patients. This is best documented for patients with diabetic peripheral neuropathy (DPN), suggesting that endurance training has the potential to prevent the onset of and reduce the progression of DPN. In general, balance exercises showed the highest effect on the motor as well as sensory symptoms in all types of PNP.ConclusionOverall, balance training appears to be the most effective exercise intervention. Studies focusing exclusively on strength, or a combination of endurance and strength, appear to have a lower impact. For metabolically-induced neuropathies, endurance training also plays an important role. Further research with high methodological quality needs to be conducted in order to establish evidence-based clinical recommendations for neuropathic patients.

The Impact of Exercise on Cancer Mortality, Recurrence, and Treatment-Related Adverse Effects

The combination of an increasing number of new cancer cases and improving survival rates has led to a large and rapidly growing population with unique health-care requirements. Exercise has been proposed as a strategy to help address the issues faced by cancer patients. Supported by a growing body of research, major health organizations commonly identify the importance of incorporating exercise in cancer care and advise patients to be physically active. This systematic review comprehensively summarizes the available epidemiologic and randomized controlled trial evidence investigating the role of exercise in the management of cancer. Literature searches focused on determining the potential impact of exercise on 1) cancer mortality and recurrence and 2) adverse effects of cancer and its treatment. A total of 100 studies were reviewed involving thousands of individual patients whose exercise behavior was assessed following the diagnosis of any type of cancer. Compared with patients who performed no/less exercise, patients who exercised following a diagnosis of cancer were observed to have a lower relative risk of cancer mortality and recurrence and experienced fewer/less severe adverse effects. The findings of this review support the view that exercise is an important adjunct therapy in the management of cancer. Implications on cancer care policy and practice are discussed.

Physical Activity in Breast Cancer Patients during Medical Treatment and in the Aftercare - a Review.

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-induced natural killer cell activation is driven by epigenetic modifications

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.

12-Week Resistance Training with Breast Cancer Patients during Chemotherapy: Effects on Cognitive Abilities

(CG). Patients in the IG participated in a 60-min session of resistance training twice a week for 12 weeks, performing 3 sets of 8–12 repetitions of 10 different exercises at 55–75% of their hypothetical 1-repetition maximum. Exercise sessions were supervised and performed at a healthorientated fitness studio. Cognitive functions were assessed by 4 neuropsychological tests. The MEMO memory test [6] was applied to test verbal memory, the Wilde intelligence subtest (WIT) [7] to determine the working memory, and the d2 test of attention, consisting of 2 different tests, to provide information about focused attention and concentration abilities [8]. Assessments were conducted at the beginning (pre) and at the end (post) of the 12-week physical intervention in the IG, whereas the CG was only tested at the end of the trial. The pre-test was conducted during chemotherapy and the post-test 1–2 weeks after its termination. Statistical analyses consisted of a paired/dependent t-test (type 1) to assess intergroup changes in the IG and an independent t-test (type 2, 2 samples, same variance) to identify differences between the IG and the CG at the end of the trial.

Implementation and scientific evaluation of rehabilitative sports groups for prostate cancer patients: study protocol of the ProRehab Study

BackgroundAlthough treatment regimen have improved in the last few years, prostate cancer patients following a radical prostatectomy still experience severe disease- and treatment-related side effects, including urinary incontinence, erectile dysfunction and psychological issues. Despite high incidence rates and the common adverse effects there is a lack of supportive measures for male patients and specific physical exercise recommendations for prostate cancer patients during rehabilitation or in the aftercare are still missing.Methods/DesignThe ProRehab Project aims to establish rehabilitative sports groups particularly for prostate cancer patients and to evaluate the effects of the offered exercise program. Starting 8–12 weeks after prostatectomy or combination therapy, prostate cancer patients will exercise for 15 months within a patient preference randomized controlled trial. One exercise session will be conducted within a pre-established rehabilitative sports group, while the other will be completed independently. Patients in the control group will not participate in the intervention. The main outcomes of the study include aerobic fitness, quality of life, incontinence and erectile dysfunction.DiscussionBy combining science, practice, and public relations the first rehabilitative sports groups for prostate cancer patients in Germany have been set up and thus contribute to the care structure for prostate cancer patients. By offering a 15-month physical exercise intervention that is conducted in supervised group sessions, long-term lifestyle changes and therefore improvements in quality of life in prostate cancer patients can be expected.Trial registrationGerman Clinical Trials Register DRKS00004184

Effects of a 15-Month Supervised Exercise Program on Physical and Psychological Outcomes in Prostate Cancer Patients Following Prostatectomy: The ProRehab Study

Purpose. Despite advanced medical treatment options, many prostate cancer patients are still confronted with unfavorable physical and psychological burdens. Physical exercise has proven to be beneficial for prostate cancer patients, yet specific exercise offers are rare. The ProRehab Study aimed to evaluate the exercise program offered in rehabilitative prostate cancer sports groups in Germany and determine whether it is beneficial for patients following prostatectomy. Methods. Eighty-five prostate cancer patients were recruited for a multicenter, 2-armed, nonrandomized controlled trial 6 to 12 weeks after prostatectomy. The intervention group (n = 56) took part in a 15-month supervised multimodal exercise program. Exercise sessions took place once a week for 60 minutes at a moderate intensity (3.84-4.84 MET-hour). The control group (n = 29) received no intervention. Outcomes included aerobic fitness, activity levels, quality of life, disease- and treatment-related adverse effects, such as urinary incontinence and erectile dysfunction, and relapse-relevant blood values. Intention-to-treat analysis was performed. Results. A significant between-group difference was observed in the urinary symptom score (P = .027). Physical fitness, urinary incontinence, physical, role, emotional, and social functioning, as well as further disease- and treatment-related side effects (dyspnea, urinary, and bowel symptoms) significantly improved within the intervention group. Erectile dysfunction and physical activity levels improved similarly in both groups. Conclusions. The presented data hint at the potential of rehabilitative sports groups for prostate cancer patients. However, according to the current state of the art, exercise intensity and volume may need to be increased to enhance the effects. A number of shorter studies (8-24 weeks) have proven significant between-group differences in quality of life, incontinence, and fitness outcomes when patients exercised 2 to 3 times per week. This is the first exercise intervention study with prostate cancer patients that was conducted over 15 months. Further studies are necessary to investigate whether prostate cancer patients recover sooner when receiving a supervised exercise program.

Enhancing active surveillance of prostate cancer: the potential of exercise medicine

Active surveillance (AS) is a strategy for the management of patients with low-risk, localized prostate cancer, in which men undergo regular monitoring of serum PSA levels and tumour characteristics, using multiparametric MRI and repeat biopsy sampling, to identify signs of disease progression. This strategy reduces overtreatment of clinically insignificant disease while also preserving opportunities for curative therapy in patients whose disease progresses. Preliminary studies of lifestyle interventions involving basic exercise advice have indicated that exercise reduces the numbers of patients undergoing active treatment, as well as modulating the biological processes involved in tumour progression. Therefore, preliminary evidence suggests that lifestyle and/or exercise interventions might have therapeutic potential in this growing population of men with prostate cancer. However, several important issues remain unclear: the exact value of different types of lifestyle and exercise medicine interventions during AS; the biological mechanisms of exercise in delaying disease progression; and the influence of the anxieties and distress created by having a diagnosis of cancer without then receiving active treatment. Future studies are required to confirm and expand these findings and determine the relative contributions of each lifestyle component to specific end points and patient outcomes during AS.