Training Explained
When you exercise you burn calories, but you only burn FAT up to a certain point.
After this point (indicated as your upper limit) the amount of body fat you burn drops dramatically.
Why? Your body needs a surplus of oxygen to burn fat.
This upper limit is the point at which your body can no longer supply oxygen fast enough to your cells to burn fat for fuel.
When you exceed this upper limit, your body switches energy systems from aerobic (technically meaning “with oxygen”) to an anaerobic energy system. In this state, your body burns mostly protein and carbohydrate and very little fat.
Key: To get lean and enhance cardiovascular fitness, train in your Aerobic Fat Burning Zone (between 60% and 75% of MHR). To ensure you stay within this zone, wear a Heart Rate Monitor (e.g. Polar)