Aerobic metabolism is the way your body creates energy through the combustion of carbohydrates, amino acids, and fats in the presence of oxygen. Combustion means burning, which is why this is called burning sugars, fats, and proteins for energy. Aerobic metabolism is used for the sustained production of energy for exercise and other body functions. Examples of exercises that use aerobic metabolism include walking, running, or cycling with sustained effort.
Anaerobic metabolism:
Anaerobic metabolism is the creation of energy through the combustion of carbohydrates in the absence of oxygen. This occurs when your lungs cannot put enough oxygen into the bloodstream to keep up with the demands of your muscles for energy. It generally is used only for short bursts of activity, such as when you go for a sprint when running or cycling or when you are lifting heavy weights.
When there isn't enough oxygen in the bloodstream, glucose and glycogen cannot be fully broken down to carbon dioxide and water. Instead, lactic acid is produced, which can build up in the muscles and degrade muscle function.
Aerobic metabolism is the way your body creates energy through the combustion of carbohydrates, amino acids, and fats in the presence of oxygen. Combustion means burning, which is why this is called burning sugars, fats, and proteins for energy. Aerobic metabolism is used for the sustained production of energy for exercise and other body functions. Examples of exercises that use aerobic metabolism include walking, running, or cycling with sustained effort.
Your body will often switch between aerobic and anaerobic metabolism during sports and exercise activities that require short bursts of sprints as well as sustained jogging, such as in soccer, tennis, and basketball.
Differences between aerobic and anaerobic metabolism:
Anaerobic metabolism is not as efficient as aerobic metabolism. A molecule of glucose can only produce three ATP molecules under anaerobic metabolism, while it produces 39 with aerobic metabolism. ATP is what fuels the muscles.
Anaerobic metabolism can only use glucose and glycogen, while aerobic metabolism can also break down fats and protein. Intense bouts of exercise in the anaerobic zone and in the red-line zone with a heart rate over eigthy five percent of your maximum heart rate will result in using anaerobic metabolism to fuel the muscles.
While your body will naturally use the energy pathways that will best get the job done, you have a choice in how strenuously you exercise. Training programs for different sports and activities are designed to make the best use of aerobic and anaerobic metabolism.
Can we use both metabolisms simultaneously?give an example.
ReplyDeleteWhat are advantages of aerobic metabolism over anaerobic metabolism?Explein them.
Example: Energy to run.
ReplyDeleteWe can use both metabolisms because: with the help of oxygen (aerobic metabolism) that reaches the lungs. But increase the intensity of the exercise, the system becomes saturated and the muscle has to resort to a less efficient process, but one that allows it to continue functioning. This new system does not require oxygen and produces lactic acid (anaerobic metabolism). It is less efficient because it has to burn much more fuel to produce the same amount of energy. It is also less efficient because lactic acid favors muscle fatigue.
The step from one to another is done gradually. In a stress test in which we will increase the speed of the stepped race, the concentration of lactic acid in the blood is maintained at low levels until a certain speed in which it will increase very slowly. If we continue to increase speed we will see that at a certain moment the increase in speed accelerates and their responses soar. Therefore, there are two points at which the lactic curve changes. These two points correspond to the Aerobic Threshold and the Anaerobic Threshold.
It can be explained in the following way. Until reaching the Aerobic Threshold, the muscle obtains all its energy from aerobic metabolism (with oxygen). Upon reaching the Threshold, the aerobic muscle is repeated in the lactic acid system to supplement the aerobic system with a little more energy. But the aerobic system continues to predominate, for a long time. This is due to fuel reserves. The low frequencies from which they are formed are eliminated by respiration.
If we keep increasing the speed, the moment will come when the aerobic system becomes saturated and all the additional energy comes from the anaerobic system (without oxygen). Such a quantity of dairy products is produced that an increase occurs again, this time much greater, in ventilation or respiration. This point is the Anaerobic Threshold, or what is the same, the speed and intensity in the lactic acid is triggered. From here the muscle runs out quickly.
The aerobic system allows us to maintain a high intensity and the muscle can work for long periods of time.
Aerobic exercise: are medium or low intensity and long-lasting exercises, where the body needs to burn hydrates and fats to obtain energy and for this it needs oxygen. Examples of aerobic exercises are: running, swimming, cycling, walking, etc. It is often used to lose weight, because as we said, with this type of exercise fat is burned. Also, by needing a lot of oxygen, the cardiovascular system is exercised and produces numerous benefits.
Anaerobic exercise: they are high intensity exercises and of short duration. Here oxygen is not needed because the energy comes from immediate sources that do not need to be oxidized by oxygen, such as muscle ATP, PC or phosphocreatine and glucose. They are examples of anaerobic exercises: doing weights, speed races and exercises that require great effort in a short time. These types of exercises are good for work and strengthening the musculoskeletal system (toning).