SPRINT CYCLING INCREASES GROWTH HORMONE AND IGF-1

SPRINT CYCLING INCREASES GROWTH HORMONE AND IGF-1 

Growth hormone and IGF-1 are two important anabolic hormones that increase lean muscle and strength. Growth hormone promotes muscle hypertrophy indirectly by increasing the production of IGF-1.


Growth hormone (GH) is a stress hormone that raises the concentration of glucose and free fatty acids. It also stimulates production of IGF-1. GH also known as somatotropin ), is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans and other animals. It is thus important in human development. Ref : https://en.wikipedia.org/wiki/Growth_hormone

Israeli researchers from the Sackler School of Medicine in Tel Aviv found that growth hormone, IGF-1 and lactate increased during a single 30-second maximal sprint on a stationary bike (i.e., Wingate test). Growth hormone increased more and peaked earlier in women than men, but IGF-1 only increased significantly in men. This was an interesting study, but it has little practical application. (Fitness RX for women)