Adipose tissue depositions between muscle compartments, known as intermuscular adipose tissue (IMAT), occurs in various conditions such as with obesity and aging. Tissue sodium content (TSC) measured by sodium magnetic resonance imaging increases with aging and may be associated with insulin resistance. In this study, we found a correlation between IMAT volume percentage and muscle TSC (r=0.52, p=0.01). Additionally, mean TSC in the IMAT region was higher than mean TSC in total muscle (p<0.001). The relationship between tissue sodium content and IMAT opens avenues for understanding the mechanisms of sodium storage and fat depositions in tissue compartments of the leg.
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