The fitness of the elderly is no longer the training of muscle strength, not the enhancement of cardiopulmonary function, but the exercise and maintenance of the body. This exercise refers to keeping the body's immune ability and cell activity sufficient, that is, delaying his aging to a certain extent. However, it is worth mentioning that the elderly with cardiovascular and cerebrovascular diseases can't do this kind of high-intensity exercise, and what they can do may be limited to walking and playing Tai Ji Chuan, so don't try anaerobic exercise, because anaerobic exercise has a heavy burden on the heart and blood vessels, and people with this disease can't do it.
This 79-year-old grandmother can keep healthy because she has no serious cardiovascular and cerebrovascular diseases, such as heart disease, thrombosis and other high blood pressure. If you do high-intensity exercise, it will increase blood vessels, increase the burden on the heart and easily lead to the recurrence of the disease. Moreover, these diseases have a characteristic that once they are serious, they are irreversible, so it is ok for the elderly to exercise properly for their own health, but don't let everyone.
Finally, to sum up, it is a prerequisite for the elderly to keep fit according to their physical condition. Your body has no cardiovascular and cerebrovascular diseases, similar to that when you were young, but not as energetic as before. You can do some simple anaerobic exercise training, or jog. Then running is not recommended for people over 70 years old, because the strength of bones is not as high as that of young people. If you have a fracture in the corresponding behavior such as falling, you will recover more than normal people.