An athlete who follows a carbohydrate-loading regimen in the days leading up to a race will have increased muscle stores of both glycogen and

An athlete who follows a carbohydrate loading regimen in the days leading up to a race will have increased muscle glycogen and liver glycogen stores.

Explanation:

Organisms that practice sports and wear a lot of waste generate glycogen reserves with diets rich in carbohydrates, but not only in the muscles, but also in the liver.

Consequently, the accumulation of adipose tissue would follow as a form of energy source, but it is rare to find it in an athlete since they have high energy consumption.

An athlete who follows a carbohydrate-loading regimen in the days leading up to a race will have increased muscle stores of both glycogen and

The answer to the question is "Liver stores of glycogen"

Explanation:

Glucose is the prime source of energy for the body. Glucose, in the body is converted to Glycogen, a form of sugar that can be easily stored by our muscles and liver.

Glycogen is the storage form of glucose and carbohydrates in animals and humans. Glycogen's role in maintaining blood-glucose levels is important because glucose is virtually the only fuel used by the brain, except during prolonged starvation.  

In humans, glycogen is made and stored primarily in the cells of the liver and skeletal muscle. Glycogen is also found in smaller amounts in other tissues, including red blood cells, white blood cells, kidney cells.

Glycogen is made and stored in liver and muscle cells. Muscle cell glycogen is broken down into glucose, and liver glycogen is broken down into glucose as a circulating energy source glucose for use by the body.

Carbohydrates in the body is converted  into a form of sugar called ‘glucose’ that can be used for energy.

Carbohydrates are a main fuel source for  the body. Example of Carbohydrates rich foods: bread, apple, banana, oatmeal.

Carbohydrate loading is known to produce an increase in stored muscle glycogen. It is a strategy used by endurance athletes, such as runners, to maximise the storage of glycogen in the muscles and liver.

Most high endurance athletes use carbohydrate loading as a nutrition regimen a few days prior to the event. Diet where foods are high in  carbohydrates are eaten a few days prior to or right before an  event in turn aiding in physical performance and long-term endurance.