Each of Three Groups of Cyclists Had a Different Diet

Multiple Choice

Each of three groups of cyclists had a different diet: high-carbohydrate; a mix of carbohydrates, fat, and protein; or high in protein and fat. The blood glucose levels of the riders over a six-hour period after consuming each diet is shown in the accompanying graph. Which statement best summarizes the data in the graph?

A) Endurance is entirely related to diet.
B) Maintaining elevated blood sugar improves endurance.
C) An early 50 percent drop in blood glucose is associated with improved endurance.
D) Diet is not at all related to endurance.