Aerobic System (Endurance) – the aerobic system of our body enhances the breakdown of glucose for energy. It requires oxygen and it’s slow. This system provides 38 molecules of ATP. It uses fat to produce ATP energy. Endurance training allows the muscles burn fat efficiently.
ATP-CP System – this is our body’s short burst system and it is a 6 second burst. Your body can use this during a 6 second sprint and it doesn’t need oxygen. ATP-CP acts as a support to the anaerobic system.
CP stands for Creatine Phosphate. It is also a high-energy molecule that allows the the phosphate to break off quickly so it can release energy.
It is used to convert ADP to ATP. The muscles can’t store CP in large quantity since it is a short burst. Athletes and others who need high creatine levels use creatine supplements.
Anaerobic System – this is a 90 second burst. It is a high-power anaerobic system that breaks down glucose and turns it into energy by providing 2 molecules of ATP. This process produces lactic acid which can cause muscle fatigue if the acid accumulates in the muscles faster than our body can get rid of it.
The Energy Fuels For The Body
One way to provide your body with energy is to eat. You may be tempted to grab a snack bar when you notice any of these signs mentioned earlier. The best thing you can do is to prepare the right diet for yourself before you notice the signs.
The right diet that serves as energy fuels are carbohydrate, protein and fat. The body breaks down these nutrients to supply energy that is measured as kilocalories (kcal) per gram (g).
Here is a list that serves as a guide for you to know the amount of energy you can get from each of the nutrients
Carbohydrate gives 3.75kcal/g
Fat gives 9kcal/g
Protein gives 4kcal/g
Although fat provides more than what carbohydrate and protein do, it isn’t better than the other 2. If you are working out, the best food is carbohydrate because of the glucose it provides.
Glucose is produced when carbohydrate is broken down and it is stored as glycogen in the liver and muscles. The body can’t store more than 450g for a person weighing 70kg or 1700 kcal of glycogen.
If your body burns more energy than what it has stored within itself then it will search for alternative sources for energy.