Originally Posted by kingkelly
Everyone keeps saying that cycling eats away at fat and muscle mass, but im wondering why? Shouldnt the use of your arms and legs produce more muscle? adn even if you dont use much upper body during rides, wouldnt it just not affect muscle?
Just wondering...
You can lose muscle if blood sugar goes too low.....the body then releases a hormone called cortisol which breaks down muscle into amino acids. These amino acids can be converted into glucose in the liver through a process called gluconeogenesis. Usually cortisol is not released until liver glycogen is depleted.