Definition: In this zone of exercise intensity, the body uses both stored fat and carbohydrates for energy. At 70-80% of your maximum heart rate, 50% of your calories burned in this zone are fats, 1% are proteins and 50% are carbohydrates. This intensity zone is excellent for increasing the number and size of blood vessels, increasing vital capacity and respiratory rate and achieving increases in pulmonary ventilation, as well as increases in arterial venous oxygen.
Pronunciation: er-oh-bic zone
Also Known As: cardio zone
Common Misspellings: arobic, airobic
Examples: Walk in the aerobic zone to increase your fitness level.
