10/04/2026
Skeletal muscle is now recognized as an endocrine organ, meaning it does far more than enable movement—it actively communicates with the rest of the body. When muscles contract during exercise, they release signaling molecules called myokines, which travel through the bloodstream and influence major organs like the brain, liver, and fat tissue.
This process triggers powerful health benefits: it reduces chronic inflammation through molecules like IL-6, improves blood sugar control by enhancing insulin sensitivity, supports brain function by stimulating BDNF for memory and neuroprotection, and helps burn harmful visceral fat by converting it into energy-burning forms. In essence, every strength-training repetition sets off a cascade of biochemical signals that promote whole-body health, making muscle activity a key driver of both physical and metabolic well-being.