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training in patients with cancer undergoing systemic treatment: a systematic review and meta-analysis of published and unpublished controlled trials

Prehabilitation for patients undergoing neoadjuvant therapy prior to cancer resection: a systematic review and meta-analysis

PURPOSE

To determine the effectiveness of uni- or multimodal prehabilitation on several outcomes in patients undergoing neoadjuvant therapy before cancer surgery.

METHODS

A systematic search was carried on May 1, 2023, using four major databases (SCOPUS, Web of Science, Medline (Ovid and Pubmed)) and updated monthly until February 2024. Inclusion criteria included (i) any original articles (any design), (ii) adult patients undergoing neoadjuvant therapy (NAT) prior to surgical resection, (iii) participation in uni- or multimodal prehabilitation programs during NAT, and (iv) reporting on any functional, treatment-related, or perioperative outcome. Two reviewers independently conducted the search and screened all records. Risk of bias was assessed using the Johanna Briggs Institute Appraisal Tools independently by two reviewers. A random-effects meta-analysis was performed for all outcomes with two or more studies.

RESULTS

A total of 30 records met the inclusion criteria and were analyzed. Studies showed that prehabilitation during NAT can be feasible in most settings and increase or prevent the loss of cardiorespiratory fitness (CRF), maintain or improve muscle mass, and improve pathological response and treatment completion compared to no prehabilitation, but the certainty of the evidence is low to moderate. However, according to our findings, prehabilitation has little to no effect on postoperative complications and length of hospital stay as well as in health-related quality of life.

CONCLUSIONS

Prehabilitation during NAT might be feasible and associated with improvements in cardiorespiratory fitness, muscle mass, and treatment response/completion with low-to-moderate certainty of evidence. Insufficient data on safety is available at this stage.

The Physical Activity and Cancer Control (PACC) framework: update on the evidence, guidelines, and future research priorities

BACKGROUND

We proposed the Physical Activity and Cancer Control (PACC) framework in 2007 to help organise, focus, and stimulate research on physical activity in eight cancer control categories: prevention, detection, treatment preparation/coping, treatment coping/effectiveness, recovery/rehabilitation, disease prevention/health promotion, palliation, and survival.

METHODS

This perspective paper provides a high-level overview of the scientific advances in physical activity research across cancer control categories, summarises current guidelines, updates the PACC framework, identifies remaining and emerging knowledge gaps, and provides future research directions.

RESULTS

Many scientific advances have been made that are reflected in updated physical activity guidelines for six of the cancer control categories apart from detection and palliation. Nevertheless, the minimal and optimal type, dose, and timing of physical activity across cancer control categories remain unknown, especially for the understudied population subgroups defined by cancer type, age, race/ethnicity, and resource level of regions/countries.

CONCLUSION

To achieve the full benefit of physical activity in cancer control, future research should use innovative study designs that include diverse at-risk populations and understudied cancer sites. Additionally, effective behaviour change strategies are needed to increase physical activity levels across populations that use implementation science to accelerate the translation from evidence generation into practical, real-world interventions.

Does stress compromise fruit and vegetable intake? A randomized controlled trial testing a model with planning as a mediator and stress as a moderator

OBJECTIVE

Individuals experiencing higher stress levels tend to consume fewer fruits and vegetables compared to their less stressed counterparts. Thus, to promote fruit and vegetable (FV) consumption, action planning has been proven effective in translating behavioral intentions into actual dietary behaviors. This study aims to evaluate a 7-day intervention designed to improve FV planning and intake, while also examining the role of stress.

METHODS

The trial employed a 3 (time: pretest, post-test, and follow-up) * 2 (group: intervention vs. control) between-participant factorial design. A total of 99 young Chinese adults (age = 23.84 years ± 4.63, 26 men) who had formed an explicit intention to consume more fruit and vegetables, participated in a 7-day online randomized controlled trial.

RESULTS

The intervention successfully enhanced FV planning as well as FV intake. Furthermore, a moderated mediation model revealed that FV planning mediated the relationship between experimental conditions and FV intake, with stress moderating this mediation. Specifically, planning facilitated FV intake for individuals with low stress levels, while this effect was not observed for those with high stress levels.

CONCLUSION

These findings confirm the positive impact of the planning intervention on improving FV intake, particularly for individuals with low stress levels, and highlight stress as a barrier to health behavior change that warrants further attention in future studies.

Impact of body composition, grip strength, and physical performance on clinical outcomes for locally advanced gastric cancer during neoadjuvant chemotherapy: A prospective cohort study

OBJECTIVE

Neoadjuvant chemotherapy (NC) is critical in treating locally advanced gastric cancer (LAGC). However, the effect of body composition, grip strength, and physical performance during neoadjuvant chemotherapy remains uncertain. This study aimed to investigate the impact of these factors on perioperative clinical outcomes in LAGC patients undergoing NC.

METHODS

A total of 162 consecutive patients receiving NC at two centers were prospectively registered between June 2022 and September 2023. The data on body composition parameters, grip strength, and physical performance during NC were collected, compared, and analyzed. The primary outcome was the tumor response after completion of NC.

RESULTS

Overall, we included 92 LAGC patients. No significant changes were observed in body composition, grip strength, and physical performance after NC. The change in skeletal muscle index and grip strength were both significantly lower in the patients with poor tumor response. According to the Youden index, the cutoff values of △SMI and △grip strength were -2.0 and -2.8, respectively. Based on these two parameters, the area under the curve to predict tumor response was 0.817 (P < 0.001). Furthermore, visceral fat index (VFI) loss >6.9 and 5-time chair stand test increase >2.4 independently predicted postoperative complication (OR: 3.82, 95% CI: 1.138-12.815, P = 0.030; OR: 5.01, 95% CI: 1.086-23.131, P = 0.039, respectively).

CONCLUSIONS

For LAGC patients receiving NC, changes in SMI, VFI, grip strength, and physical status can predict perioperative clinical outcomes. These patients should be given special nutritional intervention.

Effects of resistance training on quality of life, fatigue, physical function, and muscular strength during chemotherapy treatment: a systematic review and meta-analysis

PURPOSE

To systematically review and meta-analyse the efficacy of resistance training on quality of life (QOL), fatigue, physical function, and muscular strength in people diagnosed with cancer undergoing chemotherapy.

METHODS

Electronic databases PubMed, Cochrane Central, CINAHL, SCOPUS and Web of Science were systematically searched for randomised controlled trials (RCTs) that compared the effects of resistance training to control on QOL, fatigue, physical function, and lower-body and upper-body muscular strength in adults undergoing chemotherapy. Standardised mean differences (SMDs) were pooled using a random effects model. Risk of bias was assess using the risk of bias tool for randomised trials (RoB 2).

RESULTS

Seven RCTs encompassing 561 participants were included. The pooled results of seven RCTs showed that resistance training during chemotherapy significantly improved lower-body strength (n = 555, SMD 0.33, 95% CI 0.12 to 0.53, moderate-quality evidence, I2 = 23%) compared to control. There was no evidence for an effect of resistance training on QOL (n = 373, SMD 0.13, 95% CI -0.15 to 0.42, low-quality evidence, I2 = 0%), fatigue (n = 373, SMD -0.08, 95% CI -0.37 to 0.22, low-quality evidence, I2 = 20%), physical function (n = 198, SMD 0.61, 95% CI -0.73 to 1.95, very low-quality evidence, I2 = 83%), or upper-body strength (n = 413, SMD 0.37, 95% CI -0.07 to 0.80, very low-quality evidence, I2 = 69%).

CONCLUSIONS

Resistance training may improve lower-body strength in patients undergoing chemotherapy treatment compared to control.

Moderate physical activity during neoadjuvant chemotherapy in breast cancer patients: effect on cancer-related inflammation and pathological complete response-the Neo-Runner study

BACKGROUND

Physical activity (PA) reduces the risk of developing breast cancer (BC) and mortality rate in BC patients starting PA after diagnosis. Immunomodulation is considered responsible for these effects. However, limited data exist on the immunomodulation induced by moderate PA (mPA) during neoadjuvant chemotherapy (NACT). We have investigated the longitudinal change of cytokines during NACT alone or combined with mPA.

MATERIALS AND METHODS

Twenty-three cytokines were analyzed in BC patients at consecutive timepoints: at baseline (T0), before starting mPA (T1), before surgery (T2), and after surgery (T3). mPA consisted of 3-weekly brisk-walking sessions for 9-10 consecutive weeks.

RESULTS

Ninety-two patients were assessed: 21 patients refused mPA (untrained) and 71 agreed (trained). At T1, NACT induced significant up-regulation of interleukin (IL)-5, IL-6, IL-15, chemokine ligand (CCL)-2, interferon-γ, and C-X-C motif ligand (CXCL)-10 and reduction of expression of IL-13 and CCL-22. At T2, NACT and mPA induced up-regulation of IL-21, CCL-2, and tumor necrosis factor-α and reduction of expression of IL-8, IL-15, vascular endothelial growth factor, and soluble interleukin 6 receptor. Only CXCL-10 increased in untrained patients. A cytokine score (CS) was created to analyze, all together, the changes between T1 and T2. At T2 the CS decreased in trained and increased in untrained patients. We clustered the patients using cytokines and predictive factors and identified two clusters. The cluster A, encompassing 90% of trained patients, showed more pathological complete response (pCR) compared to the cluster B: 78% versus 22%, respectively.

CONCLUSIONS

mPA interacts with NACT inducing CS reduction in trained patients not observed in untrained patients, suggesting a reduction of inflammation, notwithstanding chemotherapy. This effect may contribute to the higher rate of pCR observed in the cluster A, including most trained patients.

Trajectories of patient-reported outcomes after oesophageal cancer surgery - A population-based study

BACKGROUND

This study aimed to investigate the trajectories of patient-reported outcomes for individuals who have undergone surgery for oesophageal cancer over a five-year post-surgical period, and to identify modifiable factors that contribute to a decline in quality of life.

METHODS

Patients who underwent resection in Sweden between 2013 and 2020 were included. Data were collected at one-year post-surgery and at regular pre-determined intervals during the five-year post-surgical period. Latent class analysis and logistic regression models were used to identify symptom trajectories and determine their association with lifestyle factors, respectively.

RESULTS

This study included 408 patients, and the majority experienced consistent symptom burdens during the five-year post-surgery period. Current smokers had a higher risk of belonging to the severe dysphagia, severe eating restriction, and severe reflux trajectory. Physically active patients were less likely to belong to the severe dysphagia, severe eating restriction, and severe pain and discomfort trajectory. Patients with a stable weight were less likely to belong to the severe eating restriction and to the recovering body image trajectory.

CONCLUSIONS

Patients who are smokers, have a low level of physical activity, and experience weight loss need further attention and individual support to mitigate long-term symptom burden.

P-move: a randomized control trial of exercise in patients with advanced pancreatic or biliary tract cancer (aPBC) receiving beyond first-line chemotherapy

PURPOSE

Patients with advanced pancreatic and biliary tract cancer (aPBC) frequently suffer from high symptom burden. Exercise can reduce treatment side effects and improve patient-related outcomes (PROMs). However, evidence from prospective studies regarding feasibility and efficacy in advanced settings are sparse. The primary aim of this prospective, randomized-controlled study was to evaluate the feasibility and effects of exercise (ET) in patients with aPBC.

METHODS

Patients with aPBC beyond first-line therapy were randomized according to the minimization procedure with stratification by gender, age, and loss of body weight in the past six months. The intervention group (IG) completed 3 training units/week for 8 weeks (1x supervised strength sessions, 2x individualized home-based sessions). Control group (CG) received recommendations on physical activity during cancer.

RESULTS

41 patients (stage IV pancreatic or biliary tract cancer) were included no adverse events related to exercise occurred during the trial. Physical function increased significantly in IG in 5 out of 7 physical domains. Comparison of IG and CG at 8 weeks (t2) showed significant differences in favour of IG in leg press (p=0.001), bench press (p=0.011), sit-to-stand (p=0.001) and crunch (0.006). Constipation revealed a significant difference in favour of IG at t2 (p=0.033). Quality of life stabilized/increased in IG during the study period compared to a decrease in CG. Throughout/Over the 8 weeks, fatigue notably reduced in the IG (p=0.028).

CONCLUSION

Exercise is safe and feasible in patients with aPBC undergoing further line therapy. Significant improvements in physical functioning and increased quality of life were achieved. German Clinical Trials Register ID: DRKS00021179; Registration date 15.05.2020.

The safety, feasibility, and efficacy of an 18-week exercise intervention for adults with primary brain cancer - the BRACE study

PURPOSE

To determine the safety, feasibility, and potential effect of an 18-week exercise intervention for adults with primary brain cancer.

MATERIALS AND METHODS

Eligible patients were 12-26-weeks post-radiotherapy for brain cancer. The individually-prescribed weekly exercise was ≥150-minutes of moderate-intensity exercise, including two resistance-training sessions. The intervention was deemed "safe" if exercise-related, serious adverse events (SAE) were experienced by <10% of participants, and feasible if recruitment, retention, and adherence rates were ≥75%, and ≥75% compliance rates were achieved in ≥75% of weeks. Patient-reported and objectively-measured outcomes were assessed at baseline, mid-intervention, end-intervention, and 6-month follow-up, using generalized estimating equations.

RESULTS

Twelve participants enrolled (51 ± 19.5 years, 5 females). There were no exercise-related SAEs. The intervention was feasible (recruitment:80%, retention:92%, adherence:83%). Participants completed a median of 172.8 (min:77.5, max:560.8) minutes of physical activity per week. 17% met the compliance outcome threshold for ≥75% of the intervention. Improvements in quality of life (mean change (95% CI): 7.9 units (1.9, 13.8)), functional well-being (4.3 units (1.4, 7.2)), depression (-2.0 units (-3.8, -0.2)), activity (112.8 min (42.1, 183.4)), fitness (56.4 meters (20.4, 92.5)), balance (4.9 s (0.9, 9.0)), and lower-body strength (15.2 kg (9.3, 21.1)) were observed end-intervention.

CONCLUSION

Preliminary evidence support that exercise is safe and beneficial to the quality of life and functional outcomes for people with brain cancer.Registration: ACTRN12617001577303.

Virtually Supervised Exercise Programs for People With Cancer: A Scoping Review

BACKGROUND

Exercise has been shown to improve physical function and quality of life for individuals with cancer. However, low rates of exercise adoption and commonly reported barriers to accessing exercise programming have demonstrated a need for virtual exercise programming in lieu of traditional in-person formats.

OBJECTIVE

The aim of this study was to summarize the existing research on supervised exercise interventions delivered virtually for individuals living with and beyond cancer.

METHODS

We conducted a scoping review of randomized controlled trials, pilot studies, or feasibility studies investigating virtually supervised exercise interventions for adults either during or after treatment of cancer. The search included EMBASE, MEDLINE, CINAHL, SPORTDiscus, Cochrane Library, and conference abstracts.

RESULTS

Fifteen studies were included. The interventions were delivered mostly over Zoom in a group format, with various combinations of aerobic and resistance exercises. Attendance ranged from 78% to 100%, attrition ranged from 0% to 29%, and satisfaction ranged from 94% to 100%. No major adverse events were reported, and only 3 studies reported minor adverse events. Significant improvements were seen in upper and lower body strength, endurance, pain, fatigue, and emotional well-being.

CONCLUSION

Supervised exercise interventions delivered virtually are feasible and may improve physical function for individuals with cancer. The supervision included in these virtual programs promoted similar safety as seen with in-person programming. More randomized controlled trials with large cohorts are needed to validate these findings.

IMPLICATIONS FOR PRACTICE

Individuals living with and beyond cancer can be encouraged to join virtually supervised exercise programs because they are safe, well enjoyed, and may improve physical function and quality of life.

The efficacy and safety of exercise regimens to mitigate chemotherapy cardiotoxicity: a systematic review and meta-analysis of randomized controlled trials

BACKGROUND

Cardiotoxicity is one of the most common adverse events of the chemotherapy. Physical exercise was shown to be cardioprotective. We aim to estimate the efficacy and safety of exercise in cancer patients receiving cardiotoxic chemotherapy.

METHODS

We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs), which were retrieved by systematically searching PubMed, Web of Science, SCOPUS, Cochrane, Clinical Trials.gov, and MedRxiv through July 17th, 2023. We used RevMan V. 5.4 to pool dichotomous data using risk ratio (RR) and continuous data using mean difference (MD), with a 95% confidence interval (CI).

PROSPERO ID

CRD42023460902.

RESULTS

We included thirteen RCTs with a total of 952 patients. Exercise significantly increased VO2 peak (MD: 1.95 with 95% CI [0.59, 3.32], P = 0.005). However, there was no significant effect regarding left ventricular ejection fraction, global longitudinal strain, cardiac output, stroke volume, left ventricular end-diastolic volume, left ventricular end-systolic volume, E/A ratio, resting heart rate, peak heart rate, resting systolic blood pressure, and resting diastolic blood pressure. Also, there was no significant difference regarding any adverse events (AEs) (RR: 4.44 with 95% CI [0.47, 41.56], P = 0.19), AEs leading to withdrawal (RR: 2.87 with 95% CI [0.79, 10.43], P = 0.11), serious AEs (RR: 3.00 with 95% CI [0.14, 65.90], P = 0.49), or all-cause mortality (RR: 0.25 with 95% CI [0.03, 2.22], P = 0.21).

CONCLUSION

Exercise is associated with increased VO2 peak in cancer patients receiving cardiotoxic chemotherapy. However, there was no significant difference between exercise and usual care regarding the echocardiographic and safety outcomes.

Dropout from exercise trials among cancer survivors-An individual patient data meta-analysis from the POLARIS study

INTRODUCTION

The number of randomized controlled trials (RCTs) investigating the effects of exercise among cancer survivors has increased in recent years; however, participants dropping out of the trials are rarely described. The objective of the present study was to assess which combinations of participant and exercise program characteristics were associated with dropout from the exercise arms of RCTs among cancer survivors.

METHODS

This study used data collected in the Predicting OptimaL cAncer RehabIlitation and Supportive care (POLARIS) study, an international database of RCTs investigating the effects of exercise among cancer survivors. Thirty-four exercise trials, with a total of 2467 patients without metastatic disease randomized to an exercise arm were included. Harmonized studies included a pre and a posttest, and participants were classified as dropouts when missing all assessments at the post-intervention test. Subgroups were identified with a conditional inference tree.

RESULTS

Overall, 9.6% of the participants dropped out. Five subgroups were identified in the conditional inference tree based on four significant associations with dropout. Most dropout was observed for participants with BMI >28.4 kg/m2 , performing supervised resistance or unsupervised mixed exercise (19.8% dropout) or had low-medium education and performed aerobic or supervised mixed exercise (13.5%). The lowest dropout was found for participants with BMI >28.4 kg/m2 and high education performing aerobic or supervised mixed exercise (5.1%), and participants with BMI ≤28.4 kg/m2 exercising during (5.2%) or post (9.5%) treatment.

CONCLUSIONS

There are several systematic differences between cancer survivors completing and dropping out from exercise trials, possibly affecting the external validity of exercise effects.