First of all, people with heart problems can't do exercise. There is something wrong with your own heart. Your heart will beat faster after exercise, so this unhealthy heart may not be able to stand it. As we all know, the heart is so important to the human body, and there are many blood vessels near the heart, and the blood flow is very large. Once the blood vessels rupture, the consequences are unimaginable.
Secondly, people with lung problems can't do exercise. The lung is an important organ for human respiration. After strenuous exercise, it will definitely increase the number of breaths. But if your lungs are not so healthy, you are likely to have difficulty breathing, which may lead to suffocation. Moreover, this critical situation is also very risky when it is reversed, because once the pulmonary artery ruptures, it is fatal to the patient.
Finally, people with breathing problems can't do exercise. The most common is asthma. What about asthma? It's hard to control. Because you don't know when it will appear. At the onset, patients need to take medicine to relieve this symptom, and in severe cases, they need to stay in hospital for observation. Therefore, exercise is not recommended for patients with severe asthma, so as to avoid poor breathing and lead to hypoxia.