In autumn, the wind blows gently and the weather is delightful. It is the best period to have physical training during a year. At this time, people should have the cold tolerance training or cold acclimatization training as early as possible to enhance the body resistance against cold and improve the comprehensive quality of the body. This can help them defeat cold and protect themselves. The cold tolerance training includes various ways like morning exercises, running in the early morning, Taijiquan, mountaineering, swimming and cold water bath. People may choose the training forms suitable for themselves according to personal conditions. Of the above events, mountaineering has been very popular since the ancient times in China. Old people are organized to climb the mountain on lunar September 9 every year. This event can not only exercise the body, but also make people cheerful. There- fore, the event has lasted so far and has already become the popular folk custom and mass sports activity.
