FGF2 and neoplasm: The anti‐tumour effect of exercise is also partially attributed to exercise‐induced cytokines because metabolites released from skeletal muscle following exercise enhance the effector profile of CD8+ T cells.S24 Various cytokines, such as irisin, myostatin, insulin‐like growth factor‐1 (IGF‐1), hepatocyte growth factor (HGF), basic fibroblast growth factor (bFGF), and interleukin‐6 (IL‐6), have been demonstrated to control SC functions.5, 41