INS and type 2 diabetes mellitus: Besides dietary factors, exercise has been shown as an important factor in both prevention and treatment of T2D because of its insulin-sensitizing effect.15, 16 It has been shown that long term, intense physical training significantly affects the fatty acid composition of membrane phospholipids.17 To our best knowledge, the effect of a vegetarian diet compared with a conventional diet on the fatty acid composition of membrane phospholipids after the aerobic exercise program has not been studied yet.