The 84-year-old man practicing yoga is a special case, and is not suitable for all the elderly to practice. We know that once a person reaches old age, the bones will be loose, it is difficult to do some difficult work. For most of the elderly, they often do not have the means to do these difficult work, yoga is very concerned about the flexibility of the body, the elderly to practice, it is easy to cause bone damage. Of course, regular exercise for the elderly is very good for the body, which can reduce the occurrence of diseases and at the same time make them feel physically and mentally happy. For the elderly, I do think that you can practice Tai Chi and other slow sports, so that their bodies get exercise, Tai Chi is a very good way to exercise. Don't look at the slow movements of Tai Chi, but it is very difficult to do it seriously. It is good to have the five bird play and so on, all of which can be exercised. These exercises are summarized after previous experience and have great benefits for the body. I have learned the five bird play, eight brocade, Tai Chi and so on. Don't underestimate them, these things can really improve your physique and make yourself healthy physically and mentally. Compared to yoga, these exercises are more suitable for older people and are less likely to cause injuries. But for those who really love yoga, it is also possible to exercise yoga properly and exercise your body. Often, it is we who set boundaries for ourselves and make ourselves feel that this thing is impossible, that we can't do it. In fact, most things are better with practice. It also took this old man about 20 years to be able to reach these heights. It is all a process of slow growth from simple to difficult. But I myself is not easy for the elderly to practice yoga, after all, yoga is still very difficult for the elderly, if you are not careful, you will hurt yourself. Of course, usually to practice more, you can go running, square dancing and so on. Now there are a lot of sports for the elderly to exercise, but also at any time through the network to learn their own interest . In short, personal opinion, the elderly is not very suitable for practicing yoga.