Why did the ancients choose "March 9" and "dog days" to practice? What's the point?

Practice three or nine times in winter and three times in summer. This is a proverb, referring to some hardworking people. This is the coldest and hottest time of the year, and they exercise at such extreme temperatures. According to the latest news I have learned, in the cold winter of September in the lunar calendar, practicing martial arts can not only enhance physical fitness, but also exercise people's strong will not to be afraid of the cold. Enhance the body's adaptability to cold. With the vigorous exercise of the whole body, breathing deepens, digestion is enhanced, metabolism is vigorous, and physical condition is improved.

1. Exercise is more effective. Necessary skin conditioning and sports performance will also be improved accordingly. A certain period of the traditional lunar calendar in China is also called dog days or nine days. There's a saying in China that it's three volts in summer, three volts in winter, and three volts corresponds to three or nine volts, which refers to the third nine days to the day after beginning of winter, that is, the 27th day to the day after 19 arrived in beginning of winter. The third nine-day solstice after beginning of winter refers to the March 9th, which is also the day when the March 9th intersects with the 49th, not the March 9th, which means that the March 9th is nine days instead of one day.

Second, the substitution of enhancing physical fitness? People say, count 39 cold days, count 39 cold days. Sanjiu usually occurs in the winter solstice, and it is actually the first in the dog days, belonging to the first. There is actually the last one in the middle, which is the hottest season of the year. It appears in the solar calendar from mid-July to mid-August every year, and its climate is characterized by high temperature, low pressure, high humidity and low wind speed. V means being forced to hide underground.

Third, can you adapt? According to the climate law of the China lunar calendar, the predecessors have actually stipulated that the third boxer from summer to the future is the first crouching, the fourth boxer is the middle crouching, the second boxer, and the first boxer after the early autumn is the last dog days, with ten days in the beginning and ten days in the middle, and the total dog days are thirty or forty days.

Finally, the analysis of why the above-mentioned ancients practiced martial arts in March 9 and dog days is here today.