Due to the aging population of hemodialysis (HD) patients and the increased burden resulting from physical and cognitive decline as well as frailty, implementing targeted interventions to prevent functional decline is urgently needed. The aim of this Master's thesis was to assess the effect of intradialytic cognitive training combined with intradialytic cycling on the concentration of brain-derived neurotrophic factor (BDNF), perception of mental fatigue, degree of frailty, quality of life, cognitive abilities, and physical performance in HD patients.
In a randomized, controlled intervention study, 32 HD patients participated and were randomly assigned to an experimental group (n = 16) and a control group (n = 16). Patients in the experimental group performed a combination of 30–45-minute cycling on an adapted cycle and cognitive training via a tablet computer three times per week during dialysis over a 12-week intervention period, while the control group received standard HD care. Measurements included serum BDNF concentration, subjective perception of mental fatigue (visual analog scale – M-VAS), frailty (Edmonton Frailty Scale – EFS), quality of life (physical [PCS] and mental [MCS] components), cognitive abilities (Montreal Cognitive Assessment – MoCA), and physical performance (Timed Up and Go test – TUG). Statistical analyses were conducted using paired t-tests, repeated measures analysis of variance (ANOVA-RM), and Pearson’s correlation coefficient.
The results showed that the experimental group achieved a significant reduction in the perception of mental fatigue (p = 0.042) and significant improvements in MoCA (p < 0.001) and TUG test results (p < 0.001). The experimental group maintained their BDNF values, whereas the control group experienced a significant decrease in concentration (p = 0.006). A negative correlation was found between the change in BDNF concentration and the change in mental fatigue across the entire sample (r = -0.554; p = 0.001). Frailty decreased (albeit insignificantly) in the experimental group, while it significantly worsened in the control group (p = 0.011).
The study’s conclusions indicate that a combined intervention of intradialytic cycling and cognitive training can positively impact the reduction of mental fatigue, as well as improve cognitive and physical abilities, thereby contributing to a higher quality of life in HD patients. These results support the integration of such interventions into routine clinical practice to help mitigate the negative consequences of physical and cognitive decline and frailty in this population.
|