Esmaeili Sirchi, M. et al. 2026. The Effect of Aerobic and Resistance Training on Gut Microbiome Composition and Its Association with Irisin Protein Levels in Aged Mice: The Role of Faecalibacterium prausnitzii, Clostridium difficile, and Enterococcus faecalis. Health Nexus. (Jan. 2026), 1–12. DOI:https://doi.org/10.61838/.