Recruitment to and pilot results of the PACES randomized trial of physical exercise during adjuvant chemotherapy for colon cancer

Barriers and Facilitators to Physical Activity Participation Among Colorectal Cancer Survivors: A Mixed-Method Systematic Review

OBJECTIVES

Physical activity (PA) is essential in cancer rehabilitation. Worryingly, PA compliance among colorectal cancer (CRC) survivors is relatively poor, and the barriers and facilitators of PA participation in this population are poorly understood. This review aimed to identify the barriers and facilitators of PA participation among CRC survivors and apply the Capability-Opportunity-Motivation-Behavior (COM-B) model to analyze and categorize these factors.

METHODS

A mixed-method systematic review was conducted using six electronic databases (Embase, Medline, PubMed, Scopus, Web of Science, and Chinese National Knowledge Infrastructure) to conduct literature search. The searches were conducted from the inception of databases till May 2024, and eligible studies were limited to English or Chinese. The mixed methods appraisal tool (MMAT) was utilized to perform quality assessment, and the convergent integrated approach and descriptive analysis were used for data synthesis and analysis.

RESULTS

This review included 32 studies (seven qualitative, 24 quantitative, and one mixed-method), and no studies were eliminated due to quality. According to the COM-B model, cancer-related symptoms, time constraints, and lack of motivation or interest were the main barriers to PA participation among CRC survivors. The main facilitators of PA participation for CRC survivors included improvement in cancer-related symptoms, enough social support from family and friends, and perceived benefits of PA.

CONCLUSIONS

This review comprehensively identified the unique barriers and facilitators to PA participation among CRC survivors based on the COM-B model. Future research should consider these barriers and facilitators and develop effective PA interventions to increase PA compliance among CRC survivors.

The role of physical activity, sedentary behaviour, diet, adiposity and body composition on health-related quality of life and cancer-related fatigue after diagnosis of colorectal cancer: a Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis

BACKGROUND

The impact of physical activity, sedentary behaviour, diet, adiposity, and body composition on health-related quality of life (HRQoL) and cancer-related fatigue among colorectal cancer survivors remains uncertain.

METHODS

PubMed, Embase, and CENTRAL were systematically searched until April 2023 for relevant randomised controlled trials (RCTs) and cohort studies. Random-effects meta-analyses or descriptive syntheses were conducted depending on the number of studies. The evidence was interpreted and graded by an independent World Cancer Research Fund Expert Committee and Expert Panel.

RESULTS

We included 31 RCTs (18 exercise, 14 diet) and 30 cohort studies (8 physical activity, 3 sedentary behaviour, 13 diet, 9 adiposity and body composition). Meta-analyses were possible for exercise RCTs that showed non-significant effects but indicative of improved HRQoL (overall four trials for global HRQoL, physical and emotional well-being) and fatigue (five trials). These studies were rated at a high risk of bias (RoB), and evidence was graded as 'very low certainty of an effect'. Descriptive synthesis of interventions to improve diet quality suggested small improvements in global HRQoL and physical well-being, but with a high RoB rating leading to a 'low certainty' grading. Evidence from RCTs on probiotics and supplements and evidence from observational studies on sedentary behaviour, and various dietary and body composition factors was generally inconsistent and too scarce to draw conclusions.

CONCLUSIONS

Exercise and diet quality interventions might improve HRQoL and fatigue outcomes in colorectal cancer survivors. The evidence overall was limited and should be strengthened by larger, well-designed RCTs across the cancer continuum.

Supervised Home-Based Exercise Intervention in Colorectal Cancer Patients Following Surgery: A Feasibility Study

This pilot study aimed to assess the feasibility and preliminary effects of a supervised, home-based exercise program in patients recovering from laparoscopic colorectal cancer surgery. A total of 23 patients were included, with 13 participating in the exercise intervention and 10 receiving standard postoperative care. The exercise group (intervention group) followed a two-month structured program, while the control group received no structured exercise. Feasibility was demonstrated by 98% adherence in the intervention group and no reported adverse events. At T1, the intervention group showed significant improvements in role function, cognitive function, and reduced fatigue compared to the control group. At T2, a significant difference was observed in physical function. Functional capacity, assessed by the Six-Minute Walk Test, was significantly better in the intervention group at T1, T2, and T3, as was physical performance measured by the Short Physical Performance Battery (SPPB) at T1, T2, and T3. No significant differences were observed between the groups in anxiety, depression, sleep quality, or body composition parameters. This study highlights the feasibility of a supervised home-based exercise program in the early postoperative phase, demonstrating positive effects on Quality of Life, functional recovery, and fatigue in colorectal cancer patients.

A systematic review and meta-analysis of randomized controlled trials for physical activity among colorectal cancer survivors: directions for future research

Background

Physical activity (PA) is critically important to cancer rehabilitation. However, PA levels are generally lower in colorectal cancer (CRC) survivors compared to other cancer survivors. The purpose of this study was to examine the effectiveness of PA interventions in increasing PA levels and to provide recommendations for developing PA interventions in CRC survivors.

Methods

A systematic literature search was conducted in Cochrane Library, Embase, PubMed, Scopus, Web of Science, China National Knowledge Infrastructure, and Wan Fang Data from January 2010 to March 1, 2024. The Physiotherapy Evidence Database (PEDro) scale was used to assess the methodological quality of eligible studies, and the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) method was used to evaluate the certainty of evidence. The random-effects model was used in meta-analysis, and data were analyzed using standardized mean differences and 95% confidence intervals.

Results

A total of 22 studies were included in this review, all of which were rated as having good methodological quality based on the PEDro scale. In the meta-analysis, nine of these studies involving 684 participants were included, and results showed that PA interventions have a positive effect on increasing total PA levels in CRC survivors (Z = 2.79, p = 0.005). Results of subgroup analysis revealed that supervised PA interventions (Z = 2.82, p = 0.005) and PA interventions with multiple intervention components (Z = 3.06, p = 0.002) effectively increased total PA levels for CRC survivors. In addition, research evidence suggests that daily as the frequency (Z = 4.28, p < 0.001), Moderate-to-vigorous physical activity (MVPA) as the intensity (Z = 2.29, p = 0.022), aerobic combined with resistance exercise as the type of PA (Z = 4.19, p < 0.001) is appropriate for increasing total PA levels in CRC survivors.

Conclusions

The findings of this review provide strong evidence supporting the positive role of PA interventions in improving total PA levels among CRC survivors. This study offers preliminary insights into the appropriate patterns of PA interventions (e.g., frequency, intensity, type) for enhancing total PA levels in CRC survivors. However, further high-quality clinical trials are needed to determine the optimal timing, duration, and delivery methods of PA interventions to maximize their effectiveness in this population.

Combined exercise on fatigue, quality of life and physical functioning in people under chemotherapy with oxaliplatin: Systematic review and meta-analysis

OBJECTIVE

To investigate the effects of combined exercise on fatigue, anxiety, depression, quality of life and physical functioning in gastroinstestinal neoplasm in people under chemotherapy with oxaliplatin treatment.

METHODS

We searched pubmed/MEDLINE, Cochrane Central Register of Controlled Trials, PEDro data base, and SciELO (until Nov 2023) for randomized controlled trials that investigated the effects of combined exercise in gastroinstestinal neoplasm people under chemotherapy with oxaliplatin treatment. Two comparisons were made: combined exercise versus usual care, combined aerobic and versus usual care (follow up). The main outcomes were muscle strength, aerobic capacity, fatigue, anxiety, depression and quality of life. Mean differences (MD) with 95% confidence interval (CI) were calculated.

RESULTS

Seven randomized controlled trials met the eligibility criteria, which included 464 people. Compared to usual care, combined aerobic and resistance resulted in decrease of general fatigue (-2.82; IC: 4.92 to -0.69, N = 48), physical fatigue (-5.08; IC: 8.41 to -1.74, N = 48) and improvement of domain physical functioning of quality of life (9.40; IC: 2.74 to 16.06, N = 48). Compared to usual care, combined aerobic and resistance - Follow up resulted in decrease of general fatigue (-2.32; IC: 4.41 to - 0.28, N = 48), physical fatigue (-0.92; IC: 3.31 to -1.47, N = 48) and improvement ofdomain physical functioning of (9.83; IC: 0.66 to 19.01, N = 48).

CONCLUSIONS

Our results demonstrate that combined exercises improves fatigue (general; physical), domain physical functioning of quality of life in gastrointestinal neoplasm people under chemotherapy treatment when compared to usual care.

Updated systematic review of the effects of exercise on understudied health outcomes in cancer survivors

INTRODUCTION

The American College of Sports Medicine provided guidelines for exercise prescriptions in cancer survivors for specific cancer- and treatment-related health outcomes. However, there was insufficient evidence to generate exercise prescriptions for 10 health outcomes of cancer treatment. We sought to update the state of evidence.

METHODS

We conducted a systematic review of these 10 understudied health outcomes (bone health, sleep, cardiovascular function, chemotherapy-induced peripheral neuropathy (CIPN), cognitive function, falls and balance, nausea, pain, sexual function, and treatment tolerance) and provided an update of evidence.

RESULTS

While the evidence base for each outcome has increased, there remains insufficient evidence to generate exercise prescriptions. Common limitations observed across outcomes included: variability in type and quality of outcome measurement tools, variability in definitions of the health outcomes, a lack of phase III trials, and a majority of trials investigating breast or prostate cancer survivors only.

CONCLUSION

We identified progress in the field of exercise oncology for several understudied cancer- and treatment-related health outcomes. However, we were not able to generate exercise prescriptions due to continued insufficient evidence base. More work is needed to prescribe exercise as medicine for these understudied health outcomes, and our review highlights several strategies to aid in research acceleration within these areas of exercise oncology.

Effectiveness of Therapeutic Exercise Models on Cancer-Related Fatigue in Patients With Cancer Undergoing Chemotherapy: A Systematic Review and Network Meta-analysis

OBJECTIVE

To assess and compare the effectiveness of different exercise modalities in reducing cancer-related fatigue (CRF) in patients with cancer undergoing chemotherapy. Exercise intensities for selected exercise types were also compared.

DATA SOURCES

We conducted a search in MEDLINE, Embase, CINAHL, Scopus, SPORTDiscus, and Web of Science from inception to October 15, 2021.

STUDY SELECTION

Randomized controlled trials concerning the effectiveness of exercise modalities on CRF in patients with cancer undergoing chemotherapy were included.

DATA EXTRACTION

Study characteristics were extracted using a structured protocol. Methodological quality was assessed employing the PEDro scale and risk of bias was assessed using the Revised Cochrane Risk of Bias Tool for Randomized Trials. The certainty of evidence was assessed based on Grading of Recommendations, Assessment, Development and Evaluation. The measure of effect used was the adjusted standardized mean difference (SMD) or Hedge's g, together with the corresponding 95% confidence intervals (CI).

DATA SYNTHESIS

Forty-seven studies were included. Data were pooled employing a random-effects model. There was a trend that adding low-intensity aerobic and resistance exercise (SMD=1.28, 95% CI -0.18; 2.75, P=.086), or moderate-intensity aerobic and resistance exercise (SMD=0.85; 95% CI -0.12; 1.82, P=.087), was more effective than adding flexibility training to usual care (UC). There was also a trend that UC alone was less effective than adding moderate-intensity aerobic and resistance exercise (SMD=-0.47, 95% CI -0.96, 0.02, P=.060) to UC.

CONCLUSIONS

The addition of low- to moderate-intensity aerobic and/or resistance exercise demonstrated a positive trend for improvement in CRF in patients with cancer undergoing chemotherapy, when compared with UC alone or UC with flexibility training.

Blood Flow Restriction in Oncological Patients: Advantages and Safety Considerations

BACKGROUND

Cancer, being a highly widespread disease on a global scale, has prompted researchers to explore innovative treatment approaches. In this regard, blood flow restriction has emerged as a promising procedure utilized in diverse clinical populations with favorable results including improvements in muscle strength, cardiovascular function, and postoperative recovery. The aim of this systematic review was to assess the efficacy of blood flow restriction in cancer survivors.

METHODS

An investigation was carried out using various databases until February 2023: PubMed, Scientific Electronic Library Online, Physiotherapy Evidence Database, Scopus, Web of Science, Cochrane Plus, SPORTDiscus, Physiotherapy and Podiatry of the Complutense University of Madrid, ScienceDirect, ProQuest, Research Library, Cumulative Index of Nursing and Allied Literature Complete Journal Storage, and the gray literature. To assess the methodological quality of the studies, the PEDro scale was utilized, and the Cochrane Collaboration tool was employed to evaluate the risk of bias.

RESULTS

Five articles found that blood flow restriction was beneficial in improving several factors, including quality of life, physical function, strength, and lean mass, and in reducing postoperative complications and the length of hospital stay.

CONCLUSION

Blood flow restriction can be a viable and effective treatment option. It is important to note that the caution with which one should interpret these results is due to the restricted quantity of articles and significant variation, and future research should concentrate on tailoring the application to individual patients, optimizing load progression, ensuring long-term follow-up, and enhancing the methodological rigor of studies, such as implementing sample blinding.

Harms of exercise training in patients with cancer undergoing systemic treatment: a systematic review and meta-analysis of published and unpublished controlled trials

Background

Exercise is recommended for people with cancer. The aim of this study was to evaluate the harms of exercise in patients with cancer undergoing systemic treatment.

Methods

This systematic review and meta-analysis included published and unpublished controlled trials comparing exercise interventions versus controls in adults with cancer scheduled to undergo systemic treatment. The primary outcomes were adverse events, health-care utilization, and treatment tolerability and response. Eleven electronic databases and trial registries were systematically searched with no date or language restrictions. The latest searches were performed on April 26, 2022. The risk of bias was judged using RoB2 and ROBINS-I, and the certainty of evidence for primary outcomes was assessed using GRADE. Data were statistically synthesised using pre-specified random-effect meta-analyses. The protocol for this study was registered in the PROESPERO database (ID: CRD42021266882).

Findings

129 controlled trials including 12,044 participants were eligible. Primary meta-analyses revealed evidence of a higher risk of some harms, including serious adverse events (risk ratio [95% CI]: 1.87 [1.47-2.39], I2 = 0%, n = 1722, k = 10), thromboses (risk ratio [95% CI]: 1.67 [1.11-2.51], I2 = 0%, n = 934, k = 6), and fractures (risk ratio [95% CI]: 3.07 [3.03-3.11], I2 = 0%, n = 203, k = 2) in intervention versus control. In contrast, we found evidence of a lower risk of fever (risk ratio [95% CI]: 0.69 [0.55-0.87], I2 = 0% n = 1109, k = 7) and a higher relative dose intensity of systemic treatment (difference in means [95% CI]: 1.50% [0.14-2.85], I2 = 0% n = 1110, k = 13) in intervention versus control. For all outcomes, we downgraded the certainty of evidence due to imprecision, risk of bias, and indirectness, resulting in very low certainty of evidence.

Interpretation

The harms of exercise in patients with cancer undergoing systemic treatment are uncertain, and there is currently insufficient data on harms to make evidence-based risk-benefits assessments of the application of structured exercise in this population.

Funding

There was no funding for this study.

Computed tomography-based preoperative muscle measurements as prognostic factors for anastomotic leakage following oncological sigmoid and rectal resections

BACKGROUND

Oncological sigmoid and rectal resections are accompanied with substantial risk of anastomotic leakage. Preoperative risk assessment and patient selection remain difficult, highlighting the importance of finding easy-to-use parameters. This study evaluates the prognostic value of contrast-enhanced (CE) computed tomography (CT)-based muscle measurements for predicting anastomotic leakage.

METHODS

Patients that underwent oncological sigmoid and rectal resections in the LUMC between 2016 and 2020 were included. Preoperative CE-CT scans, were analyzed using Vitrea software to measure total abdominal muscle area (TAMA) and total psoas area (TPA). Muscle areas were standardized using patient's height into: psoas muscle index (PMI) and skeletal muscle index (SMI) (cm2 /m2 ).

RESULTS

In total 46 patients were included, of which 13 (8.9%) suffered from anastomotic leakage. Patients with anastomotic leakage had a significantly lower PMI (22.1 vs. 25.1, p < 0.01) and SMI (41.8 vs. 46.6, p < 0.01). After adjusting for confounders (age and comorbidity), lower PMI (odds ratio [OR]: 0.85, 95% confidence interval [CI] 0.71-0.99, p = 0.03) and SMI (OR: 0.93, 95%CI 0.86-0.99, p = 0.02) were both associated with anastomotic leakage.

CONCLUSION

This study showed that lower PMI and SMI were associated with anastomotic leakage. These results indicate that preoperative CT-based muscle measurements can be used as prognostic factor for risk stratification for anastomotic leakage.

Effects of exercise by type and duration on quality of life in patients with digestive system cancers: A systematic review and network meta-analysis

BACKGROUND

There is scant evidence regarding the effects of exercise type and duration on quality of life (QoL) in digestive system cancer (DSC) survivors. We aim to investigate the optimal type and duration of exercises to improve QoL for DSC survivors through a systematic review and network meta-analysis.

METHODS

A systematic literature search of PubMed, Embase, and Web of Science was performed. Eligibility for study inclusion was limited to studies that were randomized controlled trials involving all kinds of exercise in adult patients with DSCs, and the comparator was in standard care or other types of exercise. The primary outcome was QoL, including general health, physical health, mental health, and role function. Secondary outcomes included cancer-related symptoms such as fatigue, insomnia, depression, anxiety, and duration of hospital stay. The network meta-analyses were performed using a random-effect model.

RESULTS

The analysis included 32 eligible articles and a total of 2558 participants. Our primary outcome indicated that short-term aerobic exercise significantly enhanced general health (standardized mean differences (SMDs) = 0.66, 95% credible intervals (CrIs): 0.05 to 1.30, and also contributed to a better mental health (SMD = 0.37, 95%CrI: -0.06 to 0.81 and role function (SMD = 0.48, 95%CrI: -0.27 to 1.20). Although without significant changes, short-term resistance exercise tends to increase the physical health of patients with DSCs (SMD = 0.69, 95%CrI: -0.07 to 1.50) and effective in alleviating fatigue (SMD = -0.77, 95%CrI: -1.50 to 0.01). Short-term aerobic exercise was related to a lower score of insomnia (SMD = -1.20, 95%CrI: -2.40 to 0.06), depression (SMD = -0.51, 95%CrI: -1.50 to 0.45), and anxiety (SMD = -0.45, 95%CrI: -1.30 to 0.34). All types of exercise related to a trend of declined hospital stays (-0.87 to -5.00 days). Long-term resistance exercise, however, was negatively associated with general health (SMD = -0.33, 95%CrI: -1.70 to 1.00), physical health (SMD = -0.18, 95%CrI: -1.30 to 0.90), and role function (SMD = -1.20, 95%CrI: -2.50 to 0.11).

CONCLUSION

This study suggests that short-term aerobic exercise, with or without resistance exercise programs, enhances QoL (especially for general health) as well as relieves cancer-related symptoms for DSC survivors, while long-term resistance exercise may have negative effects, and thus should be adopted cautiously. These results provide important evidence for the management of DSCs.

Preference-based versus randomized controlled trial in prostate cancer survivors: Comparison of recruitment, adherence, attrition, and clinical outcomes

Introduction

Patients' unwillingness to be randomized to a mode of exercise may partly explain their poor recruitment, adherence, and attrition in randomized controlled trials (RCTs) of exercise in oncology. It is unknown whether a preference-based trial can improve recruitment, adherence, retention, and clinical outcomes compared to a RCT of the same exercise interventions.

Objective

We assessed the effects of a 2-arm exercise preference trial on adherence and clinical outcomes compared to a similar 2-arm RCT in men with prostate cancer (PC).

Methods

This was a two-arm preference-based trial of group-based training (GROUP) or home-based training (HOME). PC survivors on androgen deprivation therapy (ADT) who declined randomization to the RCT but chose to participate in a preference trial were recruited in four Canadian centers. All study participants engaged in aerobic and resistance training, 4-5 days weekly for 6 months, aiming for 150 minutes/week of moderate-to-vigorous physical activity. The primary outcomes were changes from baseline to 6 months in fatigue and functional endurance. Secondary outcomes were quality of life, physical fitness, body composition, blood markers, and adherence. Linear mixed models were used to assess the effects of HOME versus GROUP on primary outcomes. In pooled preference and RCT data, the selection effect (i.e., difference between those who were and were not willing to be randomized) and treatment effect (i.e., difference between GROUP and HOME) were estimated using linear regression.

Results and conclusion

Fifty-four participants (mean [SD] age, 70.2 [8.6] years) were enrolled (GROUP n=17; HOME n=37). Comparable effects on primary and secondary outcomes were observed following GROUP or HOME in the preference-based trial. Adherence was similar between preference and RCT participants. However, attrition was higher in the RCT (50.0% vs. 27.8%, p= 0.04). Compared to GROUP, HOME was more effective in ameliorating fatigue (mean difference: +5.2, 95%CI=1.3 to 9.3 p=0.01) in pooled preference and RCT data. A preference-based trial results in comparable observed effects on clinical outcomes and adherence and lower attrition compared with a RCT of the same exercise interventions in PC survivors on ADT. Given the appeals of preference-based trials to study participants, additional studies are warranted.

Clinical trial registration

clinicaltrials.gov, identifier (NCT03335631).

Interventions to Reduce Sedentary Behavior in Cancer Patients and Survivors: a Systematic Review

PURPOSE OF REVIEW

Sedentary behaviors (SB) after cancer diagnosis are associated with poor prognosis for certain cancers, and cancer patients and survivors report high levels of SB. Reducing SB may be a feasible and effective intervention strategy to improve outcomes. This systematic review aims to identify and evaluate the literature on interventions to reduce SB in cancer patients and survivors.

RECENT FINDINGS

Studies were identified via database searches in December 2020. Two authors evaluated study eligibility. Data were extracted and checked, and risk of bias was assessed by the study team. Of 1401 records identified, nine studies involving 394 cancer patients or survivors were included in this review. Six were randomized trials, three were non-randomized intervention studies, and almost all (n = 8) focused on feasibility with small sample sizes. All studies were conducted within the previous 5 years in Canada, Australia, USA, and South Korea. Cancer types studied were breast (n = 3), prostate (n = 2), colorectal or peritoneal (n = 1), and mixed types (n = 3). Intervention duration of 12 weeks was most common (n = 7). Five studies had multiple intervention components, and six studies included wearable devices to measure and/or prompt behavior change. There was an overall trend where intervention groups reduced SB vs. control groups, often coupled with an increase in moderate-to-vigorous physical activity. This review suggests that there is some promise for intervention strategies to reduce SB in cancer patients and survivors. There is a need for more high-quality randomized controlled trials to understand how to best decrease SB in cancer patients and survivors.

Influence of Exercise Intervention on the Quality of Life for Colon Cancer: A Meta-Analysis of Randomized Controlled Studies

Introduction The influence of exercise intervention for colon cancer remains controversial. We conduct a systematic review and meta-analysis to explore the effect of exercise intervention on the quality of life in patients with colon cancer.

Methods We have searched PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases through September 2020 for randomized controlled trials (RCTs) assessing the effect of exercise intervention for colon cancer. This meta-analysis is performed using the random-effect model.

Results Five RCTs are included in the meta-analysis. In patients with colon cancer, exercise intervention is associated with improved health-related quality of life (SMD=2.79; 95% CI=1.66 to 3.92; P<0.00001) and reduced fatigue score (SMD=−2.21; 95% CI=−3.22 to −1.20; P<0.0001), but revealed no obvious impact on emotional functioning (SMD=0.51; 95% CI=−0.57 to 1.58; P=0.35), anxiety score (SMD=−0.93; 95% CI=−2.50 to 0.64; P=0.25) or weight (SMD=0.28; 95% CI=−0.19 to 0.75; P=0.24).

Conclusions Exercise intervention is effective to improve the quality of life in patients with colon cancer.

Efficacy of resistance training during adjuvant chemotherapy and radiation therapy in cancer care: a systematic review and meta-analysis

PURPOSE

To determine the effect of resistance training during adjuvant chemotherapy and radiation therapy in cancer patients on measures of lean mass and muscle strength. Secondary aims were to analyse the prescription and tolerability of supervised resistance training in this population.

METHODS

EMBASE, Medline, CINAHL, Cochrane Library and Web of Science were searched from inception until 29 March 2021. Eligible randomised controlled trials (RCTs) examining supervised resistance training > 6 weeks duration during adjuvant chemotherapy and/or radiation therapy in cancer patients with objective measurement of muscle strength and/or lean mass were included. The meta-analysis was performed using Revman 5.4.

RESULTS

A total of 1910 participants from 20 articles were included (mean age: 54 years, SD = 10) and the majority were female (76.5%). Resistance training was associated with a significant increase in upper body strength (standardised mean difference (SMD) = 0.57, 95% CI 0.36 to 0.79, I2 = 64%, P < 0.0001), lower body strength (SMD = 0.58, 95% CI 0.18 to 0.98, I2 = 91%, P = 0.005), grip strength (mean difference (MD) = 1.32, 95% CI 0.37 to 2.27, I2 = 0%, P < 0.01) and lean mass (SMD = 0.23, 95% CI 0.03 to 0.42, I2 = 0%, P = 0.02). A P value of < 0.05 was considered statistically significant. The quality of the studies included was moderate to high with low risk of bias as per the PEDro scale.

CONCLUSION

Resistance training is an effective adjunct therapy to improve muscle strength and lean mass in cancer patients undergoing chemotherapy and/or radiation therapy.

PROSPERO REGISTRATION NUMBER

CRD42020180643.

Physical Activity: A Systematic Review to Inform Nurse Recommendations During Treatment for Colorectal Cancer

Colorectal cancer (CRC) is the third most common cancer in the world (American Cancer Society [ACS], 2021). Because of increasing survival rates, there is a need improve survivors' quality of life (QOL), physical functioning, recurrence risk, and comorbidity prevalence (ACS, 2020). Many patients with CRC have poor QOL during and after treatment; other common side effects include fatigue, depression, anxiety, and decreased sleep quality (Bourke et al., 2014; Cramer et al., 2014; Gao et al., 2020). Focusing on the treatment period is important because physical activity (PA) may decrease side effects and prevent PA decline and functional decline, both of which can become significant barriers to PA following treatment. In addition, patients with CRC have a higher rate of comorbidities than patients without cancer, making lifestyle changes pre- and post-treatment particularly important for their continued survival and QOL (ACS, 2020).

Effects of supervised aerobic exercise on cardiorespiratory fitness and patient-reported health outcomes in colorectal cancer patients undergoing adjuvant chemotherapy-a pilot study

PURPOSE

Colorectal cancer and its treatment are associated with debilitating side effects. Exercise may improve the physical and psychological wellbeing of cancer patients; however, evidence in colorectal cancer patients undergoing adjuvant chemotherapy is limited. This pilot study aimed to explore the effects of supervised aerobic exercise on cardiorespiratory fitness and patient-reported health outcomes in colorectal cancer patients undergoing adjuvant chemotherapy.

METHODS

Patients who had undergone curative resection for colorectal cancer (stages II-III) and were scheduled to receive adjuvant chemotherapy were enrolled into this non-randomized controlled trial. Patients in the intervention group (IG) took part in a 6-month supervised aerobic exercise program, while the control group (CG) received usual care. Cardiorespiratory fitness (measured by peak oxygen consumption) was assessed at baseline and 6 months. Fatigue, quality of life, and physical activity levels were additionally assessed at 3 months.

RESULTS

In total, 59 patients (33 in IG vs. 26 in CG) were enrolled into this study. Eighteen patients (9 in IG vs. 9 in CG) dropped out of the study prior to the 6-month follow-up. Significant improvements in cardiorespiratory fitness (p = .002) and selected patient-reported health outcomes, such as reduced motivation (p = .015) and mental fatigue (p = .018), were observed in the IG when compared to the CG.

CONCLUSION

To our knowledge, this is the first study to investigate the effects of a supervised aerobic exercise program in colorectal cancer patients undergoing adjuvant chemotherapy. The significant and clinically meaningful improvements in CRF warrant further randomized controlled trials to confirm these findings.

TRIALS REGISTRATION

German Clinical Trials Register Identifier: DRKS00005793, 11/03/2014, retrospectively registered.

Who makes it all the way? Participants vs. decliners, and completers vs. drop-outs, in a 6-month exercise trial during cancer treatment. Results from the Phys-Can RCT

PURPOSE

To compare sociodemographic, health- and exercise-related characteristics of participants vs. decliners, and completers vs. drop-outs, in an exercise intervention trial during cancer treatment.

METHODS

Patients with newly diagnosed breast, prostate, or colorectal cancer were invited to participate in a 6-month exercise intervention. Background data for all respondents (n = 2051) were collected at baseline by questionnaire and medical records. Additional data were collected using an extended questionnaire, physical activity monitors, and fitness testing for trial participants (n = 577). Moreover, a sub-group of decliners (n = 436) consented to additional data collection by an extended questionnaire . Data were analyzed for between-group differences using independent t-tests and chi²-tests.

RESULTS

Trial participants were younger (59 ± 12yrs vs. 64 ± 11yrs, p < .001), more likely to be women (80% vs. 75%, p = .012), and scheduled for chemotherapy treatment (54% vs. 34%, p < .001), compared to decliners (n = 1391). A greater proportion had university education (60% vs 40%, p < .001), reported higher anxiety and fatigue, higher exercise self-efficacy and outcome expectations, and less kinesiophobia at baseline compared to decliners. A greater proportion of trial participants were classified as 'not physically active' at baseline; however, within the group who participated, being "physically active" at baseline was associated with trial completion. Completers (n = 410) also reported less kinesiophobia than drop-outs (n = 167).

CONCLUSION

The recruitment procedures used in comprehensive oncology exercise trials should specifically address barriers for participation among men, patients without university education and older patients. Individualized efforts should be made to enroll patients with low exercise self-efficacy and low outcome expectations of exercise. To retain participants in an ongoing exercise intervention, extra support may be needed for patients with kinesiophobia and those lacking health-enhancing exercise habits at baseline.

Colorectal cancer patients' experiences with supervised exercise during adjuvant chemotherapy-A qualitative study

BACKGROUND

Colorectal cancer (CRC) is a common cancer worldwide, with increasing numbers surviving and living with long-term side effects from treatment. Physical exercise during or after treatment may have several beneficial effects, but knowledge of CRC patients' reflections on exercising during adjuvant therapy is limited. The aim of this study was to explore the experiences of CRC patients participating in a supervised exercise program during adjuvant chemotherapy.

METHODS

This study included CRC patients participating in two intervention studies with individually tailored and supervised combinations of endurance, resistance, and balance exercises during adjuvant chemotherapy. Semi-structured interviews performed at the beginning, during, and immediately after the intervention period from 15 participants were analyzed using thematic analysis.

RESULTS

Four main themes identified were "structuring life with cancer," "motivation to exercise," "training experiences," and "effects of exercise." Scheduled appointments gave structure to daily life and served as an external motivational factor. The individual adjustments of exercise gave a sense of security and helped improving adherence, especially when feeling depressed or fatigued. Common expectations were improvement of endurance and strength and counteracting negative effects of chemotherapy. Experienced positive effects from exercising, both mentally and physically, contributed to inner motivation and inspired continued exercising after the study period.

CONCLUSION

This study offers important insights into CRC patients' experiences of participating in a physical exercise program during adjuvant chemotherapy. Based on our findings, we recommend supervised and individually tailored physical exercise during adjuvant chemotherapy to this patient group.

Effects of high-intensity training on the quality of life of cancer patients and survivors: a systematic review with meta-analysis

Cancer and associated medical treatments affect patients' health-related quality of life (HRQoL) by decreasing functional dimensions of physical, social, cognitive, and emotional well-being, while increasing short and late-term symptoms. Exercise, however, is demonstrated to be a useful therapy to improve cancer patients' and survivors' HRQoL, yet the effectiveness of high-intensity training (HIT) exercise is uncertain. This systematic review and meta-analysis aimed to analyse the effects of HIT on HRQoL dimensions in cancer patients and survivors as well as evaluate the optimal prescription of HIT. The search followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines (PRISMA) and examined Web of Science and PubMed (Medline) databases. Data were analysed utilizing Review Manager Software. Twenty-two articles were included in the systematic review and 17 in the meta-analysis. Results showed HIT improved global quality of life, physical functioning, role functioning, social functioning, cognitive functioning, fatigue, pain, dyspnea, and insomnia, compared to an inactive control group, yet no differences were found between HIT and low to moderate-intensity exercise interventions. Particular improvements in HRQoL were observed during cancer treatment and with a training duration of more than eight weeks, a frequency of 2 days/week, and a volume of at least 120 min/week, including 15 min or more of HIT. Our findings whilst encouraging, highlight the infancy of the extant evidence base for the role of HIT in the HRQoL of cancer patients and survivors.

A randomised feasibility trial of an employer-based intervention for enhancing successful return to work of cancer survivors (MiLES intervention)

BACKGROUND

Employers express a need for support during sickness absence and return to work (RTW) of cancer survivors. Therefore, a web-based intervention (MiLES) targeted at employers with the objective of enhancing cancer survivors' successful RTW has been developed. This study aimed to assess feasibility of a future definitive randomised controlled trial (RCT) on the effectiveness of the MiLES intervention. Also preliminary results on the effectiveness of the MiLES intervention were obtained.

METHODS

A randomised feasibility trial of 6 months was undertaken with cancer survivors aged 18-63 years, diagnosed with cancer < 2 years earlier, currently in paid employment, and sick-listed < 1 year. Participants were randomised to an intervention group, with their employer receiving the MiLES intervention, or to a waiting-list control group (2:1). Feasibility of a future definitive RCT was determined on the basis of predefined criteria related to method and protocol-related uncertainties (e.g. reach, retention, appropriateness). The primary effect measure (i.e. successful RTW) and secondary effect measures (e.g. quality of working life) were assessed at baseline and 3 and 6 months thereafter.

RESULTS

Thirty-five cancer survivors were included via medical specialists (4% of the initially invited group) and open invitations, and thereafter randomised to the intervention (n = 24) or control group (n = 11). Most participants were female (97%) with breast cancer (80%) and a permanent employment contract (94%). All predefined criteria for feasibility of a future definitive RCT were achieved, except that concerning the study's reach (90 participants). After 6 months, 92% of the intervention group and 100% of the control group returned to work (RR: 0.92, 95% CI: 0.81-1.03); no difference were found with regard to secondary effect measures.

CONCLUSIONS

With the current design a future definitive RCT on the effectiveness of the MiLES intervention on successful RTW of cancer survivors is not feasible, since recruitment of survivors fell short of the predefined minimum for feasibility. There was selection bias towards survivors at low risk of adverse work outcomes, which reduced generalisability of the outcomes. An alternative study design is needed to study effectiveness of the MiLES intervention.

TRIAL REGISTRATION

The study has been registered in the Dutch Trial Register ( NL6758/NTR7627 ).

A systematic review and meta-analysis of physical activity interventions among colorectal cancer survivors

With the growing number of colorectal cancer survivors (CRCS), theory-based, high-quality physical activity (PA) interventions are needed to promote quality and quantity of life. This systematic review and meta-analysis synthesized theory-based PA interventions among CRCS. Using PubMed, PsyINFO, CINAHL, MEDLINE, SportDiscus, and Cochrane databases, studies including CRCS participants, a PA outcome, a behavioral theory/model or behavior change techniques (BCTs), and randomized research design were identified. Two reviewers coded BCT, intervention reproducibility (Template for Intervention Description and Replication-TIDier), risk of bias, and quality of evidence. From an initial screen of 1,328 articles, 10 RCTs met our inclusion criteria. The Transtheoretical Model (n = 3), Social Cognitive Theory (n = 3), and Theory of Planned Behavior (n = 2) were the most used theories. "Goal setting (behavior)" (n = 10), "goal setting (outcome)" (n = 10), "action planning" (n = 9), and "problem solving" (n = 9) were the most commonly used BCTs. Intervention modalities were primarily print material based (n = 4) and telephone counseling (n = 4). Findings demonstrated that theory-based PA interventions are successful at increasing PA among CRCS as meta-analysis evidenced a small effect size of 0.26. TDier items 3, 9, and 12 hindered intervention replicability. Lack of blinding and bias in the measurement of outcomes by assessors resulted in serious bias. In-depth theoretical applications are needed for PA interventions that minimize bias and improve outcomes measurement. Intervention adherence and fidelity, as well as theoretical construct measurement pre- and post-intervention, will enhance the behavioral research enterprise. PROSPERO registration: CRD42019142816.

Perioperative exercise training for patients with gastrointestinal cancer undergoing surgery: A systematic review and meta-analysis

Exercise training is emerging as a supportive treatment strategy in surgical oncology, but its effects remain uncertain in patients with gastrointestinal cancer. The primary objective of this systematic review and meta-analysis was to evaluate the effects of perioperative exercise training on gastrointestinal cancer-specific mortality, recurrence, and surgical outcomes (postoperative complications, hospitalization, surgical stress) in patients with gastrointestinal cancer. Randomized or quasi-randomized controlled trials evaluating the effects of perioperative exercise training versus control in patients with GI cancer were eligible. MEDLINE, EMBASE, CENTRAL, CINAHL, PEDro, and SPORTDiscus were systematically searched on June 20, 2020. Data were synthesized using random-effects meta-analyses. Risk of bias was assessed using the Cochrane risk of bias tool 2, and the certainty of evidence was assessed using GRADE. Study selection, data extraction, risk of bias, and GRADE assessments were performed independently by two authors. Ten randomized controlled trials comprising 448 participants with gastrointestinal cancer were eligible. Meta-analyses indicated no statistical effects of exercise on postoperative complications (risk ratio: 1.11, 95% CI: 0.84; 1.47), readmissions (risk ratio: 2.76; 95% CI: 0.00, 9394.76), or postoperative length of stay (difference in means: -0.47, 95% CI: -17.2; 16.2 days). None of the eligible studies assessed gastrointestinal cancer-specific mortality or recurrence. Overall risk of bias was high or of some concerns in all studies, and the certainty of evidence was very low. The effects of perioperative exercise on cancer-specific and surgical outcomes are unknown in patients with gastrointestinal cancer due to lack of studies and very low certainty of evidence.

Evaluation of a Post-Operative Rehabilitation Program in Patients Undergoing Laparoscopic Colorectal Cancer Surgery: A Pilot Study

This pilot study explores the effects of a post-operative physical exercise program on the quality of life (QoL) and functional and nutritional parameters of patients that underwent laparoscopic colorectal cancer surgery, compared to usual care alone. The intervention group (IG) attended a 2-month-long supervised and combined exercise–training program during the post-operative period. Both IG and control group (CG) participated in the QoL, functional, and nutritional assessments before exercise training (T0), 2 months after the beginning of the exercise (end of treatment) (T1), and 2 (T2) and 4 (T3) months from the end of treatment. Eleven patients with colorectal cancer that underwent laparoscopic surgery were enrolled (six intervention; five control). The IG showed significant improvements compared to the CG in “Physical functioning” (PF2) (p = 0.030), “Cognitive functioning” (CF) (p = 0.018), and “Fatigue” (FA) (p = 0.017) of the European Organization for Research and Treatment of Cancer Quality of Life-C30 Questionnaire (EORTC QLQ-C30) at T1; in SMWT (p = 0.022) at T1; in PF2 (p = 0.018) and FA (p = 0.045) of EORTC QLQ-C30 at T2, in phase angle (PhA) of bioelectrical impedance analysis (p = 0.022) at T3. This pilot study shows that a post-operative, combined, and supervised physical exercise program may have positive effects in improving the QoL, functional capacity, and nutritional status in patients that undergo laparoscopic colorectal cancer surgery.

Feasibility and suitability of a graded exercise test in patients with aggressive hemato-oncological disease

Purpose

Physical activity promises to reduce disease-related symptoms and therapy-related side effects in patients suffering from aggressive lymphoma (L) or acute leukemia (AL). For an efficient training program, determination of patients’ physical capacity with a purposive exercise test is crucial. Here, we evaluated the feasibility and suitability of a graded exercise test (GXT) frequently applied in patients suffering from solid tumors by assessing whether patients achieved criteria for maximal exercise testing according to the American College of Sports Medicine (ACSM).

Methods

The GXT was performed by 51 patients with an aggressive L or AL prior to the start or in the earliest possible phase of high-dose chemotherapy, following a recommended protocol for cancer patients, starting at 20 Watts (W), with an increase of 10 W/min until volitional exhaustion. Subsequently, we investigated whether the following ACSM criteria were fulfilled: (1) failure of heart rate to increase despite increasing workload, (2) post-exercise capillary lactate concentration ≥ 8.0 mmol L⁻¹, (3) rating of perceived exertion at exercise cessation > 17 on the 6–20 Borg Scale.

Results

Out of 51 patients, two, six, and 35 participants met the first, second, and third criterion, respectively. No relevant relationships between the completion of the criteria and patients’ characteristics (e.g., gender, age) were found.

Conclusion

Although results of this study suggest a general feasibility of the applied GXT, the ACSM criteria were not met by the majority of the participants. Therefore, this study raises doubts about the suitability of the GXT protocol and the ACSM criteria for this group of patients.

Physical exercise during adjuvant chemotherapy for colorectal cancer-a non-randomized feasibility study

Background

Colorectal cancer (CRC) is the third most common cancer worldwide, and a large proportion of the patients receive adjuvant oxaliplatin-based chemotherapy. Most of these experience chemotherapy-induced peripheral neuropathy (CIPN), affecting quality of life. Evidence to advise exercise to reduce CIPN is limited. The primary aim of this study was to investigate the feasibility of an exercise intervention and data collection among CRC patients during adjuvant chemotherapy.

Material and methods

This non-randomized feasibility study included CRC patients admitted to adjuvant chemotherapy to an intervention consisting of supervised aerobic endurance, resistance, and balance exercises twice a week at the hospital in addition to home-based exercise once a week. A physiotherapist supervised the patients, and the intervention lasted throughout the period of adjuvant chemotherapy (12–24 weeks). Participants performed physical tests and filled in questionnaires at baseline, 3, 6, 9, and 12 months.

Results and conclusion

Nineteen (63%) of 30 invited patients consented. A major barrier to recruit or consent to participation was long travel distance to the hospital. The completion rate of questionnaires and physical tests were near 100%. Seven participants dropped out, five before the intervention started. Median attendance to supervised exercise was 85%. There were no serious adverse events related to the intervention. Except for a planned higher intensity of endurance exercise, we found the intervention feasible and safe. Based on experiences in this study, some adjustments have been made for an upcoming randomized trial, including the supervised exercise taking place close to participants’ homes.

Trial registration

NCT03885817, March 22, 2019, retrospectively registered.

Exercise and colorectal cancer: a systematic review and meta-analysis of exercise safety, feasibility and effectiveness

Background

This meta-analysis evaluated the safety, feasibility and effect of exercise among individuals with colorectal cancer.

Methods

A database search (CINAHL, Ebscohost, MEDLINE, Pubmed, ProQuest Health and Medical Complete, ProQuest Nursing, Science Direct) for randomised, controlled, exercise trials involving individuals with colorectal cancer, published before January 1, 2020 was undertaken. Safety (adverse events), feasibility (withdrawal and adherence rates) and effect data (health outcomes including quality of life, QoL) were abstracted. Risk difference (RD) and standardised mean differences (SMD) were calculated to compare safety and effects between exercise and usual care (UC). Subgroup analyses were conducted to assess whether outcomes differed by exercise mode, duration, supervision and treatment. Risk of bias was assessed using the Physiotherapy Evidence Database tool.

Results

For the 19 trials included, there was no difference in adverse event risk between exercise and UC (RD = 0.00; 95% CI:–0.01, 0.01, p = 0.92). Median withdrawal rate was 12% (0–22%) and adherence was 86% (42–91%). Significant effects of exercise compared to UC were observed for QoL, fatigue, aerobic fitness, upper-body strength, depression, sleep and reduced body fat (SMD = 0.21–0.66, p < 0.05). Subgroup analyses suggested larger benefits (p < 0.05) for QoL and fatigue for supervised interventions; for QoL, aerobic fitness and reduced body fat for ≥12-week interventions; and for aerobic fitness when interventions were during chemotherapy.

Conclusion

Although reporting of safety and compliance data was lacking in most trials, findings support that exercise is safe and feasible in colorectal cancer. Further, participation in mixed-mode exercise, including unsupervised exercise, leads to improvements in various health-related outcomes.

Moderators of Exercise Effects on Cancer-related Fatigue: A Meta-analysis of Individual Patient Data

PURPOSE

Fatigue is a common and potentially disabling symptom in patients with cancer. It can often be effectively reduced by exercise. Yet, effects of exercise interventions might differ across subgroups. We conducted a meta-analysis using individual patient data of randomized controlled trials (RCT) to investigate moderators of exercise intervention effects on cancer-related fatigue.

METHODS

We used individual patient data from 31 exercise RCT worldwide, representing 4366 patients, of whom 3846 had complete fatigue data. We performed a one-step individual patient data meta-analysis, using linear mixed-effect models to analyze the effects of exercise interventions on fatigue (z score) and to identify demographic, clinical, intervention- and exercise-related moderators. Models were adjusted for baseline fatigue and included a random intercept on study level to account for clustering of patients within studies. We identified potential moderators by testing their interaction with group allocation, using a likelihood ratio test.

RESULTS

Exercise interventions had statistically significant beneficial effects on fatigue (β = -0.17; 95% confidence interval [CI], -0.22 to -0.12). There was no evidence of moderation by demographic or clinical characteristics. Supervised exercise interventions had significantly larger effects on fatigue than unsupervised exercise interventions (βdifference = -0.18; 95% CI -0.28 to -0.08). Supervised interventions with a duration ≤12 wk showed larger effects on fatigue (β = -0.29; 95% CI, -0.39 to -0.20) than supervised interventions with a longer duration.

CONCLUSIONS

In this individual patient data meta-analysis, we found statistically significant beneficial effects of exercise interventions on fatigue, irrespective of demographic and clinical characteristics. These findings support a role for exercise, preferably supervised exercise interventions, in clinical practice. Reasons for differential effects in duration require further exploration.

Effect of Exercise on Physical Function and Psychological Well-being in Older Patients With Colorectal Cancer Receiving Chemotherapy-A Systematic Review

The incidence of colorectal cancer (CRC) increases with older age. Cancer and treatment-related side effects often lead to physical decline, poor treatment adherence, and a lower quality of life. The aim of the present systematic review and meta-analysis was to evaluate the effects of exercise reported by randomized controlled trials (RCTs) on physical function, physical fitness (ie, aerobic capacity, muscle strength) physical activity, and psychological well-being in older patients with CRC undergoing chemotherapy. Eight RCTs with 552 participants were included in the meta-analysis. The mean age across the RCTs was 58.5 years, and 2 RCTs excluded patients aged > 80 years. The meta-analyses showed a low level of evidence for a small beneficial effect of exercise on self-reported physical function (standardized mean difference [SMD], 0.26; 95% confidence interval [CI], 0.04-0.48) and global quality of life (SMD, 0.22; 95% CI, 0.02-0.43) and low level of evidence for a moderate effect of exercise reducing fatigue (SMD, -0.49; 95% CI, -0.79 to -0.19) for patients receiving chemotherapy for CRC. We found no evidence for a beneficial effect of exercise on physical fitness. No adverse events related to the exercise interventions were reported. The evidence for the effect of exercise on physical outcomes and psychological well-being during chemotherapy for patients with CRC and especially for older patients is sparse. However, exercise during chemotherapy for patients with CRC is feasible and safe. We found a moderate to high risk of bias in most of the included studies, small sample sizes, and a low number of included patients. Moreover, all studies had excluded patients with comorbidities or walking impairment, a group of patients who would probably benefit the most from exercise. This positive result requires verification in larger trials of older and frail patients receiving chemotherapy for CRC.

Muscle contractile properties of cancer patients receiving chemotherapy: Assessment of feasibility and exercise effects

Background

This pilot trial explores the feasibility of measuring muscle contractile properties in patients with cancer, effects of exercise during chemotherapy on muscle contractile properties and the association between changes in contractile muscle properties and perceived fatigue.

Method

Patients who received (neo)adjuvant chemotherapy for breast or colon cancer were randomized to a 9‐12 week exercise intervention or a waitlist‐control group. At baseline and follow‐up, we measured knee extensor strength using maximal voluntary contraction (MVC), contractile muscle properties of the quadriceps muscle using electrical stimulation, and perceived fatigue using the Multidimensional Fatigue Inventory. Feasibility was assessed by the proportion of patients who successfully completed measurements of contractile muscle properties. Exercise effects on muscle contractile properties were explored using linear regression analyses. Between‐group differences >10% were considered potentially relevant. Pearson correlation (r_p) of changes in contractile muscle properties and changes in perceived fatigue was calculated.

Results

Twenty two of 30 patients completed baseline and follow‐up assessments. Measurements of contractile properties were feasible except for muscle fatigability. We found a potentially relevant between‐group difference in the rate of force development favoring the intervention group (1192 N/s, 95% CI = −335; 2739). Change in rate of force development was negatively correlated with change in perceived general (r_p = −0.54, P = .04) and physical (r_p = −0.59, P = .02) fatigue.

Conclusion

Chemotherapy induces a decrease in the rate of force development, which may reflect a larger loss in type II muscle fibers. This may be attenuated with (resistance) exercise. The increase in the rate of force development was related to a decrease in perceived fatigue.

Physical activity interventions for disease-related physical and mental health during and following treatment in people with non-advanced colorectal cancer

BACKGROUND

Colorectal cancer is the third most commonly diagnosed cancer worldwide. A diagnosis of colorectal cancer and subsequent treatment can adversely affect an individuals physical and mental health. Benefits of physical activity interventions in alleviating treatment side effects have been demonstrated in other cancer populations. Given that regular physical activity can decrease the risk of colorectal cancer, and cardiovascular fitness is a strong predictor of all-cause and cancer mortality risk, physical activity interventions may have a role to play in the colorectal cancer control continuum. Evidence of the efficacy of physical activity interventions in this population remains unclear.

OBJECTIVES

To assess the effectiveness and safety of physical activity interventions on the disease-related physical and mental health of individuals diagnosed with non-advanced colorectal cancer, staged as T1-4 N0-2 M0, treated surgically or with neoadjuvant or adjuvant therapy (i.e. chemotherapy, radiotherapy or chemoradiotherapy), or both.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL; 2019, Issue 6), along with OVID MEDLINE, six other databases and four trial registries with no language or date restrictions. We screened reference lists of relevant publications and handsearched meeting abstracts and conference proceedings of relevant organisations for additional relevant studies. All searches were completed between 6 June and 14 June 2019.

SELECTION CRITERIA

We included randomised control trials (RCTs) and cluster-RCTs comparing physical activity interventions, to usual care or no physical activity intervention in adults with non-advanced colorectal cancer.

DATA COLLECTION AND ANALYSIS

Two review authors independently selected studies, performed the data extraction, assessed the risk of bias and rated the quality of the studies using GRADE criteria. We pooled data for meta-analyses by length of follow-up, reported as mean differences (MDs) or standardised mean differences (SMDs) using random-effects wherever possible, or the fixed-effect model, where appropriate. If a meta-analysis was not possible, we synthesised studies narratively.

MAIN RESULTS

We identified 16 RCTs, involving 992 participants; 524 were allocated to a physical activity intervention group and 468 to a usual care control group. The mean age of participants ranged between 51 and 69 years. Ten studies included participants who had finished active treatment, two studies included participants who were receiving active treatment, two studies included both those receiving and finished active treatment. It was unclear whether participants were receiving or finished treatment in two studies. Type, setting and duration of physical activity intervention varied between trials. Three studies opted for supervised interventions, five for home-based self-directed interventions and seven studies opted for a combination of supervised and self-directed programmes. One study did not report the intervention setting. The most common intervention duration was 12 weeks (7 studies). Type of physical activity included walking, cycling, resistance exercise, yoga and core stabilisation exercise. Most of the uncertainty in judging study bias came from a lack of clarity around allocation concealment and blinding of outcome assessors. Blinding of participants and personnel was not possible. The quality of the evidence ranged from very low to moderate overall. We did not pool physical function results at immediate-term follow-up due to considerable variation in results and inconsistency of direction of effect. We are uncertain whether physical activity interventions improve physical function compared with usual care. We found no evidence of effect of physical activity interventions compared to usual care on disease-related mental health (anxiety: SMD -0.11, 95% confidence interval (CI) -0.40 to 0.18; 4 studies, 198 participants; I2 = 0%; and depression: SMD -0.21, 95% CI -0.50 to 0.08; 4 studies, 198 participants; I2 = 0%; moderate-quality evidence) at short- or medium-term follow-up. Seven studies reported on adverse events. We did not pool adverse events due to inconsistency in reporting and measurement. We found no evidence of serious adverse events in the intervention or usual care groups. Minor adverse events, such as neck, back and muscle pain were most commonly reported. No studies reported on overall survival or recurrence-free survival and no studies assessed outcomes at long-term follow-up We found evidence of positive effects of physical activity interventions on the aerobic fitness component of physical fitness (SMD 0.82, 95% CI 0.34 to 1.29; 7 studies, 295; I2 = 68%; low-quality evidence), cancer-related fatigue (MD 2.16, 95% CI 0.18 to 4.15; 6 studies, 230 participants; I2 = 18%; low-quality evidence) and health-related quality of life (SMD 0.36, 95% CI 0.10 to 0.62; 6 studies, 230 participants; I2 = 0%; moderate-quality evidence) at immediate-term follow-up. These positive effects were also observed at short-term follow-up but not medium-term follow-up. Only three studies reported medium-term follow-up for cancer-related fatigue and health-related quality of life.

AUTHORS' CONCLUSIONS

The findings of this review should be interpreted with caution due to the low number of studies included and the quality of the evidence. We are uncertain whether physical activity interventions improve physical function. Physical activity interventions may have no effect on disease-related mental health. Physical activity interventions may be beneficial for aerobic fitness, cancer-related fatigue and health-related quality of life up to six months follow-up. Where reported, adverse events were generally minor. Adequately powered RCTs of high methodological quality with longer-term follow-up are required to assess the effect of physical activity interventions on the disease-related physical and mental health and on survival of people with non-advanced colorectal cancer. Adverse events should be adequately reported.

Targeting Exercise Interventions to Patients With Cancer in Need: An Individual Patient Data Meta-Analysis

Background

Exercise effects in cancer patients often appear modest, possibly because interventions rarely target patients most in need. This study investigated the moderator effects of baseline values on the exercise outcomes of fatigue, aerobic fitness, muscle strength, quality of life (QoL), and self-reported physical function (PF) in cancer patients during and post-treatment.

Methods

Individual patient data from 34 randomized exercise trials (n = 4519) were pooled. Linear mixed-effect models were used to study moderator effects of baseline values on exercise intervention outcomes and to determine whether these moderator effects differed by intervention timing (during vs post-treatment). All statistical tests were two-sided.

Results

Moderator effects of baseline fatigue and PF were consistent across intervention timing, with greater effects in patients with worse fatigue (Pinteraction = .05) and worse PF (Pinteraction = .003). Moderator effects of baseline aerobic fitness, muscle strength, and QoL differed by intervention timing. During treatment, effects on aerobic fitness were greater for patients with better baseline aerobic fitness (Pinteraction = .002). Post-treatment, effects on upper (Pinteraction < .001) and lower (Pinteraction = .01) body muscle strength and QoL (Pinteraction < .001) were greater in patients with worse baseline values.

Conclusion

Although exercise should be encouraged for most cancer patients during and post-treatments, targeting specific subgroups may be especially beneficial and cost effective. For fatigue and PF, interventions during and post-treatment should target patients with high fatigue and low PF. During treatment, patients experience benefit for muscle strength and QoL regardless of baseline values; however, only patients with low baseline values benefit post-treatment. For aerobic fitness, patients with low baseline values do not appear to benefit from exercise during treatment.

Effects and moderators of exercise on muscle strength, muscle function and aerobic fitness in patients with cancer: a meta-analysis of individual patient data

Objective

To optimally target exercise interventions for patients with cancer, it is important to identify which patients benefit from which interventions.

Design

We conducted an individual patient data meta-analysis to investigate demographic, clinical, intervention-related and exercise-related moderators of exercise intervention effects on physical fitness in patients with cancer.

Data sources

We identified relevant studies via systematic searches in electronic databases (PubMed, Embase, PsycINFO and CINAHL).

Eligibility criteria

We analysed data from 28 randomised controlled trials investigating the effects of exercise on upper body muscle strength (UBMS) and lower body muscle strength (LBMS), lower body muscle function (LBMF) and aerobic fitness in adult patients with cancer.

Results

Exercise significantly improved UBMS (β=0.20, 95% Confidence Interval (CI) 0.14 to 0.26), LBMS (β=0.29, 95% CI 0.23 to 0.35), LBMF (β=0.16, 95% CI 0.08 to 0.24) and aerobic fitness (β=0.28, 95% CI 0.23 to 0.34), with larger effects for supervised interventions. Exercise effects on UBMS were larger during treatment, when supervised interventions included ≥3 sessions per week, when resistance exercises were included and when session duration was >60 min. Exercise effects on LBMS were larger for patients who were living alone, for supervised interventions including resistance exercise and when session duration was >60 min. Exercise effects on aerobic fitness were larger for younger patients and when supervised interventions included aerobic exercise.

Conclusion

Exercise interventions during and following cancer treatment had small effects on UBMS, LBMS, LBMF and aerobic fitness. Demographic, intervention-related and exercise-related characteristics including age, marital status, intervention timing, delivery mode and frequency and type and time of exercise sessions moderated the exercise effect on UBMS, LBMS and aerobic fitness.