It takes about 90 minutes of low-intensity exercise to deplete glycogen stores, according to Iowa State University. Running for Fitness advises people to take food or sports drinks on runs that last for more than two hou... More »

Carbohydrates are stored in the muscles and liver in the form of glycogen, according to Iowa State University's sports nutrition program. Once the glycogen stores in the muscles and liver are full, carbohydrates are then... More »

Anaerobic exercise involves short, intense bursts that burn stored glycogen as fuel, explains Barbara Gibson of Fitness 19. During anaerobic exercise, no oxygen is present and lactic acid builds within the tissues. Once ... More »

Before a running race it's essential that runners eat foods that are rich in carbohydrates to restore the stores of glycogen in their livers. Protein, fat and fiber consumption should be very low. More » Health Fitness & Exercise Race Training & Events

The U.S. Centers for Disease Control and Prevention recommends at least 150 minutes moderate-intensity cardio exercise each week. Engaging in 75 minutes of vigorous-intensity cardio produce similar benefits. More » Health Fitness & Exercise Exercise

According to WebMD, the P90X workout schedule is a 13-week home exercise program that prescribes intense workouts six to seven days a week, with each workout lasting about 60 to 90 minutes. The program is presented in a ... More » Health Fitness & Exercise

People should get 150 minutes of moderate exercise or 75 minutes of vigorous exercise every week, according to the U.S. Department of Health and Human Services via the National Heart, Lung and Blood Institute. Moderate e... More » Health Fitness & Exercise Exercise