Many thanks to Lara for enquiring about Bike Nutrition
When performing a period of continuous activity such as swimming, running or cycling the body will look to used energy which it has stored. The glucose / glycogen is store in the muscles and blood. As you perform the activity it will slowly be used up. Once this is all gone, the body begins to go into deficit. So you slowly run out of energy and eventually need to stop. This is known as hitting the wall, knocking or bonking!! Depending on your fitness levels this can occur from 30-45mins.
