Tag Archives: anaerobic system

Monitoring Exercise Intensity

Exercise intensityMonitoring exercise intensity is one of the most important factors that determines if your workout is effective or not. Whether your goal is to lose weight or improve your endurance, you should keep track of your exercise intensity when you want results. For cardio training the most accurate way to measure exercise intensity is the oxygen uptake. However this requires expensive and often cumbersome equipment to be practical in everyday training. Fortunately there are three other ways that can be used effectively during your workout.

Aerobic System

The aerobic system, also called the oxidative system (aerobic means a proces which functions with the aid of oxygen) is the most important source of ATP in rest and during lower intensity exercise. In this system ATP is generated from both carbohydrates and fats, but when carbohydrate stores are depleted protein can also be used. Depending on the intensity of exercise, a certain ratio of carbohydrates and fats is used. At rest this ratio is around 70% fat and 30% carbohydrates. When exercise starts, the use of fat as an energy substrate decreases and carbohydrate use increases with the increase in intensity. When intensity rises to 100% VO2max, almost all ATP will be generated from carbohydrates.