Exercise is a full-body communication system. Muscles are not just for movement... they also communicate with your brain, bones, fat, and metabolism, helping you stay sharper, stronger, and healthier as you age. Exercise triggers a series of signals: muscles → myokines and metabolites circulate → brain, fat, bones brain → BDNF, plasticity, neuroprotection metabolism → fat burning, blood sugar control bones and muscles → strength, repair, anti-aging capabilities