Osteoarthritis is the most common age-related joint disease and places a heavy burden on society. Its prevalence can reach more than 50% in people over 65 years of age and up to about 85% in people over 75 years of age. With the acceleration of population aging in the world and in China, osteoarthritis has become an increasingly important topic of concern for doctors and patients, and even for society. At the same time, with the accelerated aging of society, and more and more middle-aged and elderly people began to pay attention to their own health and quality of life, since SARS, “life lies in sports” is no longer a slogan, the concept of “national fitness” is increasingly popular. But for the elderly, especially those who have bone and joint degeneration, the following types of exercise is not suitable, too much will make the bone and joint degeneration, accelerating the process of osteoarthritis, middle-aged and elderly friends should be careful to avoid exercise. 1, playing taijiquan Taijiquan is the essence of traditional Chinese martial arts, can strengthen the body, many elderly people like to practice taijiquan after retirement, not knowing that it has a two-sided effect on osteoarthritis. According to the latest research, if you start practicing when you are young, taijiquan does have a preventive effect on osteoarthritis, but if you start practicing after retirement, or even if you already have arthritis such as knee pain, playing taijiquan can aggravate the condition. The reason for this is mainly related to the lower limb force characteristics of Taijiquan. When playing Taiji, the knee joint is in a semi-squatting position, at this time, the knee joint (mainly the patellofemoral joint) is under six times the pressure when standing. If a person from childhood practice taijiquan, his knee joint cartilage surface with the increase in weight, with the practice of taijiquan, the degree of tolerance is also increasing year by year, taijiquan is equivalent to exercise the role of cartilage joint surface, the joint protection; Conversely, if the joint cartilage development did not receive this exercise, and then practice taijiquan after old age, the original degenerated joints suddenly withstand nearly 6 times the usual Weight bearing, will certainly aggravate its degeneration, accelerating the process of osteoarthritis. Therefore, if you have not practiced taijiquan when you were young, it is better to avoid it after middle age. 2, climbing mountains, climbing stairs Every year, when the Ninth Day, often see the organization of the elderly to climb high, climbing mountains, when the elderly struggled to climb to the top of the mountain, arms cheering, happy to be old and strong, and successfully over a hill at the same time, but do not know that the long climbing movement on their joints has caused irreversible damage. The reason for this is basically the same as before, climbing, climbing stairs and other activities, the knee joint repeatedly in flexion and weight-bearing state, which will seriously increase the burden on the knee joint, intensify the degeneration of the joint surface, accelerate the process of osteoarthritis, causing swelling and pain in the knee joint. 3, squatting Many elderly people in the time with their grandchildren, grandchildren, due to small children, inevitably often squatting, over time, there is joint pain and other symptoms of osteoarthritis. The reason for this is mainly because when squatting, the pressure on the knee joint for the usual weight of 3 to 6 times, therefore, the elderly should avoid squatting, such as the need to squat, can take the method of doing a small bench to avoid squatting, to relieve the pressure on the knee joint. 4, weight-bearing exercises Some elderly people are worried that they will get osteoarthritis, began to strengthen their own joints, such as weight-bearing running, walking with heavy objects, or even see their knee osteophytes, bone spur formation, hope that through weight exercise “grinding off” bone spurs, these are no scientific basis for exercise, the result is bound to further aggravate joint degeneration. The result is inevitably further aggravation of joint degeneration and osteoarthritis.