Development, feasibility, and efficacy of a customized exercise device to deliver intradialytic resistance training in patients with end stage renal disease: Non-randomized controlled crossover trial

Novel Approach to Intradialytic Progressive Resistance Exercise Training

Physical activity levels are typically undesirably low in chronic kidney disease patients, especially in those undergoing haemodialysis, and particularly on dialysis days. Intradialytic exercise programmes could be a solution to this issue and have been reported to be safe and relatively easily implemented in dialysis clinics. Nevertheless, such implementation has been failing in part due to barriers such as the lack of funding, qualified personnel, equipment, and patient motivation. Intradialytic aerobic exercise has been the most used type of intervention in dialysis clinics. However, resistance exercise may be superior in eliciting potential benefits on indicators of muscle strength and mass. Yet, few intradialytic exercise programmes have focused on this type of intervention, and the ones which have report inconsistent benefits, diverging on prescribed exercise intensity, absent or subjective load progression, equipment availability, or exercise supervision. Commonly, intradialytic resistance exercise interventions use free weights, ankle cuffs, or elastic bands which hinder load progression and exercise intensity monitoring. Here, we introduce a recently developed intradialytic resistance exercise device and propose an accompanying innovative resistance exercise training protocol which aims to improve the quality of resistance exercise interventions within dialysis treatment sessions.

Effects of Different Types of Exercise on Kidney Diseases

The effects of exercise on kidney function have been studied for more than three decades. One of the most common health issues among patients with chronic kidney disease (CKD) is a lack of physical activity, which leads to a low exercise capacity in these patients. The majority of maintenance hemodialysis (MHD) patients do not exercise at all. At each stage of dialysis, patients lose 10–12 g of their amino acids through blood sampling. Dialysis also leads to increased cortisol and circadian rhythm sleep disorders in hemodialysis (HD) patients. Studies have also reported higher C-reactive protein levels in HD patients, which causes arterial stiffness. Exercise has a variety of health benefits in these patients, including improved blood pressure control, better sleep, higher physical function, and reduced anxiety and depression. On the other hand, it should be noted that intense exercise has the potential to progress KD, especially when conducted in hot weather with dehydration. This review aimed to investigate the effects of different types of exercise on kidney disease and provide exercise guidelines. In conclusion, moderate-intensity and long-term exercise (for at least a 6-month period), with consideration of the principles of exercise (individualization, intensity, time, etc.), can be used as an adjunctive treatment strategy in patients undergoing dialysis or kidney transplantation.

Reasons for Nonparticipation in a Sustained Hemodialysis Intradialytic Exercise Program

OBJECTIVE(S)

Patients with end-stage kidney disease requiring hemodialysis suffer frailty and poor physical function. Exercise can improve physical function; however, barriers exist to intradialytic exercise programs. The objective of this study was to explore patients' reasons for not exercising in an extant intradialytic exercise program.

DESIGN AND METHODS

We conducted a retrospective analysis reporting the reasons for not exercising in an intradialytic exercise program in two hemodialysis centers over a 4-week period. We explored whether patient characteristics and the presence of an exercise professional were associated with missed exercise sessions.

RESULTS

Seventy-five patients participating in the intradialytic exercise program completed 57% of prescribed intradialytic exercise sessions. The three most frequently reported reasons from patients not exercising were refusal (24%), followed by fatigue (19%) and symptoms (14%). Patients were more than twice as likely to exercise if a kinesiologist was present (odds ratio [OR]: 2.26, confidence interval [CI]: 1.5, 3.4 P = .03). They were less likely to exercise if they were women (OR: 0.66, CI: 0.45, 0.95 P = .002), had been on dialysis greater than 60 months (OR: 0.55, CI: 0.37, 0.80 P < .002), or had more than two comorbid conditions (OR: 0.63, CI: 0.43, 0.90, P = .01).

CONCLUSION

Patient adherence to intradialytic exercise programs is strongly associated with the presence of exercise professionals.

Educational or behavioural interventions for symptoms and health-related quality of life in adults receiving haemodialysis: A systematic review

BACKGROUND

People with end-stage kidney disease (ESKD) suffer from multiple symptoms, which have a negative impact on their health-related quality of life (HRQoL). Educational and behavioural interventions are being developed for this population; however, the effect of these interventions is unclear.

AIM

To evaluate the effectiveness of educational or behavioural interventions compared with standard care or alternative strategies on reducing symptoms and improving HRQoL in adults with ESKD receiving haemodialysis (HD).

METHODS

An effectiveness systematic review using Joanna Briggs Institute (JBI) procedures was conducted on experimental studies [randomised controlled trials (RCTs), pseudo-RCTs and quasi-experimental designs] published in English between January 2009 and July 2019. Studies were retrieved from CINAHL, PubMed, MEDLINE, Embase, PsycINFO, Cochrane Library (Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trial) and JBI databases. Effect size at 95% confidence interval was calculated where possible.

RESULTS

Eighteen studies involving 791 participants were included in this review. All studies involved behavioural interventions with the majority of studies (n = 11) targeting psychological symptoms. Interventions were categorised as either active or passive. Active interventions seemed to improve some physical symptoms, although there was very little evidence of improvements to HRQoL. Passive interventions tended to have a large effect on psychological symptoms and the mental health components of HRQoL.

CONCLUSION

Due to great heterogeneity between studies, meta-analyses could not be conducted further limiting the evidence to inform practice. In addition, further research on educational interventions to teach self-management strategies for symptom management and to improve HRQoL in people with ESKD receiving HD are needed.

Effects of a transtheoretical model-based WeChat health education programme on self-management among haemodialysis patients: A longitudinal experimental intervention study

AIM

To examine the effects of a transtheoretical model-based WeChat health education programme on self-management in haemodialysis patients in China.

DESIGN

A longitudinal experimental intervention study.

METHODS

Patients (N = 120) who underwent haemodialysis from December 2015-November 2017 were recruited and randomly allocated to either group 1 (who received a 3-month WeChat health education immediately after randomization) or group 2 (who was combined with group 1 and received the same intervention at the 5th month after enrolment in the study). Self-management, knowledge and self-efficacy were assessed at baseline (T₀ ), 3 months after enrolment in the study (T₁ ), 21 months after enrolment in the study (T₂ ).

RESULTS

There were significant group effects on self-efficacy; time effects on partnership, self-care, emotion management with total self-management; interaction effects on problem-solving and emotion management within total self-management according to the two-way repeated measures ANCOVA. Further between-group comparisons indicated that patients in group 1 had better self-management than those in group 2 at T₁ . Within-group comparisons demonstrated that, compared with the baseline values, group 1 had significantly improved self-management at T₁ ; however, group 2 had improved self-management at T₂ .

CONCLUSION

The transtheoretical model-based WeChat health education programme had a potentially positive effect on improving the self-management of haemodialysis patients.

IMPACT

Self-management is often difficult yet crucial for haemodialysis patients. This study indicated that the transtheoretical model-based WeChat health education resulted in improved self-management in haemodialysis patients and can be implemented in continuing care during the interdialysis period to improve self-management in patients.

TRIAL REGISTRATION

ChiCTR1800018172.

Interaction of healthcare staff's attitude with barriers to physical activity in hemodialysis patients: A quantitative assessment

Background and aim of the study

In hemodialysis patients, sedentarism is a potentially modifiable mortality risk factor. We explored whether healthcare staff’s attitude towards exercise interacts with patient-perceived barriers in modifying the level of physical activity in this population.

Methods

In this prospective, cross-sectional, multicenter study we recruited 608 adult patients and 330 members of the healthcare staff in 16 hemodialysis units in Italy. We assessed patient-perceived barriers to, and healthcare staff’s attitude towards, exercise by specific questionnaires. We fitted multilevel linear models to analyze the relationships of either barriers or staff’s attitude, and their interaction, with a measure of patient self-reported physical activity (the Human Activity Profile–Adjusted Activity Score [HAP-AAS]), adjusting for multiple confounders. We also employed latent class analysis to dichotomize patients into those endorsing or not endorsing barriers.

Results

Most barriers were negatively associated with the HAP-AAS (adjusted change attributable to a given barrier ranging between -5.1 [“Feeling too old”, 95% Confidence Interval: -9.4 to -0.8] and -15.6 [“Ulcers on legs and feet”, 95%CI: -24.8 to -6.5]. We found a significant interaction between staff’s attitude and barriers (adjusted P values ranging between 0.03 [“I do not believe that it is physician’s or nurse’s role providing advice on exercise to patients on dialysis”] and 0.001 [“I do not often ask patients about exercise”]). A beneficial effect of a proactive staff’s attitude was evident only in patients not endorsing barriers.

Conclusions

Barriers and non-proactive staff’s attitude reduce physical activity in hemodialysis patients. Patients not endorsing barriers benefit the most from a proactive staff’s attitude.

Effect of intradialytic resistance training on pulse wave velocity and associated cardiovascular disease biomarkers in end stage renal disease

AIMS

Cardiovascular disease (CVD) is the leading cause of mortality in patients with end-stage renal disease (ESRD) receiving maintenance haemodialysis treatment. This study investigated the effect of a 12-week intradialytic progressive resistance training (PRT) intervention on pulse wave velocity (PWV) and associated haemodynamic, anthropometric, and hematologic outcomes in patients with ESRD.

METHODS

Twenty-two patients with ESRD (59% men, 71.3 ± 11.0 years) were recruited. Supervised PRT (three sets of 11 exercises) was prescribed three times per week during routine dialysis. The primary outcome was brachial-ankle PWV via applanation tonometry. Secondary outcomes included augmentation index, brachial and aortic blood pressures, endothelial progenitor cells, C-reactive protein, blood lipids and anthropometrics.

RESULTS

The intradialytic PRT regimen resulted in no significant change in PWV between control and intervention periods [mean difference = 0 (95% CI = -0.1 to 0.1); P = 0.58]. Similarly, no significant change was noted in any secondary outcome measures between the control and intervention periods. Post-hoc analyses limited to high adherers (≥75% attendance; n = 11) did not differ from the primary analysis, indicating no dose-response effect of our intervention.

CONCLUSION

Our 12-week PRT intervention did not change PWV or any secondary outcomes. Future studies should determine if higher dosages of intradialytic PRT (i.e. longer duration and/or higher intensity) can be applied as a method to improve arterial stiffness to potentially reduce cardiovascular disease and associated mortality this cohort.

The Diet and Haemodialysis Dyad: Three Eras, Four Open Questions and Four Paradoxes. A Narrative Review, Towards a Personalized, Patient-Centered Approach

The history of dialysis and diet can be viewed as a series of battles waged against potential threats to patients' lives. In the early years of dialysis, potassium was identified as "the killer", and the lists patients were given of forbidden foods included most plant-derived nourishment. As soon as dialysis became more efficient and survival increased, hyperphosphatemia, was identified as the enemy, generating an even longer list of banned aliments. Conversely, the "third era" finds us combating protein-energy wasting. This review discusses four questions and four paradoxes, regarding the diet-dialysis dyad: are the "magic numbers" of nutritional requirements (calories: 30-35 kcal/kg; proteins > 1.2 g/kg) still valid? Are the guidelines based on the metabolic needs of patients on "conventional" thrice-weekly bicarbonate dialysis applicable to different dialysis schedules, including daily dialysis or haemodiafiltration? The quantity of phosphate and potassium contained in processed and preserved foods may be significantly different from those in untreated foods: what are we eating? Is malnutrition one condition or a combination of conditions? The paradoxes: obesity is associated with higher survival in dialysis, losing weight is associated with mortality, but high BMI is a contraindication for kidney transplantation; it is difficult to limit phosphate intake when a patient is on a high-protein diet, such as the ones usually prescribed on dialysis; low serum albumin is associated with low dialysis efficiency and reduced survival, but on haemodiafiltration, high efficiency is coupled with albumin losses; banning plant derived food may limit consumption of "vascular healthy" food in a vulnerable population. Tailored approaches and agreed practices are needed so that we can identify attainable goals and pursue them in our fragile haemodialysis populations.