Daijiworld Media Network - Mumbai
Mumbai, Nov 6: Exercise training may help manage diabetic cardiomyopathy, particularly during its early stages, but stronger clinical evidence is needed to determine the most effective programmes and their long-term cardiovascular benefits, according to a new review.
The narrative review brings together experimental and clinical research on the role of exercise in diabetes-associated heart muscle dysfunction. It highlights promising biological mechanisms and improvements in certain clinical measures, while pointing out gaps between laboratory findings and their application in routine patient care.
Diabetic cardiomyopathy involves changes in heart muscle metabolism, fibrosis, disrupted calcium handling and ventricular remodelling. Treatment strategies capable of reversing established cardiac damage remain limited.
The review examines how exercise may influence these processes. Experimental studies suggest that regular training can support mitochondrial function, improve the heart's ability to use different energy sources and reduce oxidative stress and inflammatory signals associated with fibrosis.
Other potential benefits include improved calcium regulation and changes in pathways linked to cell death. These findings provide a scientific basis for considering exercise as part of diabetic cardiomyopathy management. However, laboratory evidence alone cannot establish the extent or long-term sustainability of these benefits in patients.
Clinical studies included in the review mainly involved people with Type 2 diabetes who had early or hidden signs of cardiac abnormalities, rather than clearly defined groups with established diabetic cardiomyopathy.
Combined aerobic and resistance training showed potential to improve cardiorespiratory fitness, insulin sensitivity, vascular function and selected measures of left ventricular performance.
High-intensity interval training may provide additional benefits for appropriately selected patients. However, its safety and effectiveness require individual assessment, and the review does not support a uniform exercise prescription for everyone.
Differences in exercise programmes and inconsistent reporting of training intensity and duration also make it difficult to compare the available findings.
The authors have called for more consistent reporting of exercise intensity and better assessment of treatment outcomes. They recommend evaluating cardiac imaging, physical capacity, biomarkers, blood sugar control and adverse events to understand the overall impact of exercise.
Larger and adequately designed clinical trials involving clearly defined patient groups are needed to establish the most effective exercise programmes and determine their long-term cardiovascular benefits.
The review identifies exercise as a promising addition to diabetic cardiomyopathy management, particularly in the early stages of the condition. However, its precise role in patients with established disease remains to be established.