The detrimental effect of physical inactivity on muscle characteristics are well known. Irisin. an exercise-induced myokine cleaved from membrane protein fibronectin type III domain-containing protein-5 (FNDC5). mediates at least partially the metabolic benefits of exercise. https://www.alarecre.com/NFL-Atlanta-Falcons-Double-Vision-iPhone-13-Pro-MagSafe-Case-p92343/