First of all swimming relies on the buoyancy of the water and restrains the gravitational pull of the earth. This avoids the compression of the body weight, and in the movement and because it is the movement to overcome the resistance of the water. The intensity of the movement is not large, so it does not cause wear and tear of the knee, ankle and lumbar joints and I think the best exercise for the elderly is walking. It is best to stick to six thousand to eight thousand steps a day. The best time is after dinner, half an hour after going out for a walk. Sixty-something can trot, heartbeat acceleration of about one hundred and fifty, so you can strengthen the heart and body. I'm not a big fan of sports, but I've always been a bit lazy. （I don't know if I'm a good sportsman, but I'm not a good sportsman, and I'm not a good sportswoman. I don't know how to play ball, badminton, ping pong, basketball, soccer, etc. I don't know how to do it, but I do know how to do it. I'm not sure how much I'm going to be able to get out of this one.
Personal physical condition is different, the way of exercise is also different. The one that suits you is the best. In my case, I play ping pong in the morning, one hour. In the afternoon, fast walking, jogging, one hour. The amount of physical exercise is enough. Tired to watch a little TV, jogging and fast walking exercise, get up at five o'clock every morning, morning exercise for an hour and a half to go home to the child to cook, send the child to school, organize the housework, cleaning, reading and learning, etc., and in the evening, after dinner, and then walking activities for half an hour, and come back to study for an hour.
People's hobbies and physical conditions vary. If you like taijiquan, go play taijiquan. If you like to dance, go dancing. In short, there is a principle, move. For most of the elderly, walking is a good choice. But some old people walk, like back hands, half an hour after dinner, I think the best exercise for the elderly is walking. However, it is not necessarily stipulated that you must walk in the evening, walking at other times of the day is also possible. Stop, according to the strength. Never try to be brave, strong, over-exercise and hurt your muscles and bones. The best exercise is walking, walking, playing tai chi and so on. Life is precious, health first. For example, slow walking, aerobics, Baduanjin, taijiquan and so on. According to my personal experience and many people, taijiquan is very suitable for the elderly fitness, choose Yang style 24 simple taijiquan short time easy to learn and not tired.