Intradialytic Cycling Shows Modest, Non-Significant Reduction in Myocardial Stunning: Study
Researchers have found in a multicenter randomized controlled trial that intradialytic exercise (cycling during hemodialysis) resulted in a modest but statistically non-significant reduction in myocardial stunning. These findings suggest potential cardiovascular benefits, while also highlighting the limited impact and need for further research in this area. The study was published in the Canadian Journal of Kidney Health and Disease by Paul N. and colleagues.
The reason for carrying out this research is due to the high prevalence of cardiovascular disease amongst patients on dialysis. There is a high risk of death and cognitive decline due to morbidity in this group. This situation is exacerbated by ischemia resulting from hemodialysis, leading to a state known as myocardial stunning, where there is reduced activity of the myocardium. Although intradialytic cycling has been thought to reduce myocardial stunning, the medical community lacks randomized control trial data to support this hypothesis. The aim of this trial is to contribute scientific evidence to guide treatment practices and international guidelines for dialysis patients.
Key findings:
- The multi-center randomized controlled trial design demonstrates substantial collaboration among scientists, where 160 patients, who are divided equally between intervention group and control group, are recruited from five different centers in Canada and from one center in Australia.
- All of these patients undergo maintenance hemodialysis, and they are evaluated at baseline, 12 weeks and 16 weeks in order to evaluate both immediate and long-term impacts of the proposed exercise intervention.
- While patients in intervention group are performing intradialytic cycling training for 12 weeks, those in the control group continue undergoing standard medical practice.
- In this way, the researchers are able to compare the levels of cardiac stress during the hemodialysis period for patients in both groups.
- To make sure that the results obtained will stand up to the tests of time, the scientists propose to conduct an in-depth evaluation of implementation process of the intervention.
- In this way, researchers will not only assess the effectiveness of intradialytic cycling training for preventing RWMA, but will learn about ways in which this activity can be successfully integrated in the work of dialysis units.
The results of this multicenter trial will show that intradialytic cycling acts as a very effective means of protecting the heart from the negative consequences of ischemia caused by dialysis treatment. As a result of a significant reduction in myocardial stunning, this procedure will contribute not only to an improvement in the cardiovascular condition of patients but also to a decrease in their symptom load and improvement in cognitive function. The findings of this RCT will be critical in changing the norms of nephrology care, thus paving the way for the incorporation of physical activity into the treatment process of hemodialysis.
Reference:
Bennett PN, Penny JD, McIntyre CW, et al. Randomized Controlled Trial of Intradialytic Cycling as Kidney Exercise Rehabilitation for Cardiac Stunning in Hemodialysis (TICKERS_HD): A Clinical Research Protocol. Canadian Journal of Kidney Health and Disease. 2026;13. doi:10.1177/20543581251391112
