How is aerobics different from aerobic exercise?
To better understand the topic, I suggest that you familiarize yourself with two opposite types of loads: aerobic and anaerobic.

What is anaerobic exercise?

To perform exercise or physical work, a person needs energy. One way it is produced is through the oxidation of glucose in the body, which is called glycolysis. As a result, pyruvic acid is formed. The process consists of a series of reactions with the release of energy, which is used by the muscles.

On this energy, the body can last a short period of about five minutes, until the supply of glucose in the blood and glycogen in the liver and muscles is used up.

In addition, a by-product is formed – lactic acid, which the body needs to remove. Therefore, in order for the muscles to perform work further, a break is required.
This load is called anaerobic. This type of training is carried out according to the “start-stop” mode: active periods are replaced by rest. A similar method, for example, trains boxers, football players.

Anaerobic training helps build muscle mass, and the body gets used to accumulating glycogen, which “burns out” during exercise. Therefore, a person can consume a large amount of food, but not get fat.
Aerobic activities
The body has another way to generate energy. This is achieved by oxidizing fats, carbohydrates and proteins: they break down into simpler substances, which is called catabolism. Oxygen takes part in these reactions.

Physical activity that uses this energy is called aerobic exercise.

IT IS IMPORTANT
When performing exercises, aerobic processes are not activated immediately, but only after a certain time after the start of training, when the supply of glucose and glycogen in the body is developed. This moment is easy to determine by breathing and other signs.
When you start running or working on simulators, for some period you will not feel a special load on the muscles, breathing and heart rate will change slightly. But as soon as you work out a little, you will begin to feel that the muscles have some kind of resistance to movement, the body is filled with warmth, breathing has intensified, sweating has appeared. It turned on the aerobic mode.

During this period, lactic acid is also formed. But with a properly selected load, she does not have time accumulate and be removed from the muscle tissue in time.
The intensity of aerobic activities is lower than anaerobic ones, as it is constrained by certain factors:

The rate of catabolism of carbohydrates, fats and proteins.
Limiting the supply of oxygen needed by the muscles. Its amount is limited by the capacity of the lungs, which inhale air, and the circulatory system, which delivers O2 to the muscles. The intention of the body to meet its oxygen needs is indicated by the acceleration and deepening of breathing, as well as an increase in blood pressure and pulse.
Aerobic workouts are long-term workouts. Popular ones are long-distance running, long walking, cycling, swimming, skating or skiing.

Aerobics also belongs to this type of exercise. It is usually done in groups.
The benefits of aerobic training

As a rule, the source of energy for aerobic exercise is fat, which accumulates in the body. But with systematic loads, obesity does not occur, since in the next classes the fat “burns out”.

Benefits of aerobic exercise:

The volume of the lungs increases.
The heart muscle becomes more powerful, and the pulse becomes more stable and less frequent.
Blood pressure normalizes, blood circulation improves.
Red blood cells are more intensively produced in the blood, carrying oxygen molecules.
The work of the nervous system is stabilized. This is an excellent prevention of nervous disorders.
In addition, as with any sports activities, muscles, ligaments, and bones of the skeleton are strengthened.
How to calculate the load?
Whether aerobic exercise is normal can be judged by the number of heartbeats and breathing.
Pulse and respiration

It is recommended to keep the maximum heart rate equal to 220 minus age. A drop in performance by a third is allowed. For example, if you are thirty years old, then in training, a pulse of 127 to 190 beats is considered optimal for you.

Breathing should be such that you can pronounce any word without losing the rhythm of inhalations and exhalations. If this fails, then the load is too high. But when in training you are able to speak freely, as in a state of rest, then the intensity of training needs to be increased.

Aerobic Threshold
Workouts are effective at high effort when they are performed in the aerobic threshold zone. But constantly keep the load above this threshold is not necessary. After all, then lactic acid will accumulate faster than its decay will occur. As a result, fatigue will appear, which will not allow you to continue the exercises.

ADVICE
In the gym for aerobic exercises, a stepper, an exercise bike, a treadmill, an elliptical trainer are well suited.
Endurance

In order for you to have aerobic endurance, you need to exercise regularly. It is achieved due to the fact that with each lesson the following changes occur in the body:

The flow of oxygen to the muscles increases during exercise, as the volume of the lungs and the number of red blood cells in the blood increase.
The energy reserve for exercise increases, because the number of mitochondria in muscle fibers increases.
The Secret to Getting Aerobic and Back
The same exercises can be both aerobic and anaerobic. How to distinguish between them, and why is this happening? I propose to find out on the example of running.
Imagine that you came to the stadium for a run, but your friend decided to test you, what are you capable of. He asked you to make a dash. Can you do it? Oh sure. You will run a hundred meters. In the process of such a short-term load, your glucose reserves will be consumed, and then glycogen. But they will replenish during the respite period.
Then you were asked to run a couple of dozen laps. You started running. Already on the second lap, the transition to aerobic mode may work for you, as the supply of glucose will run out. Moreover, you kept the pace of running on the verge of the possible.

On the tenth lap you were again asked to make a dash. Will you get it? Certainly not. Why? Because it requires anaerobic energy, i.e. glucose. And you didn’t have it.

But how do athletes accelerate during a long run? To do this, they choose a low rate, during which the body has time to synthesize glycogen.

A similar technique is suitable for aerobic walking, swimming, skiing and other physical activities.