Why did beginning of autumn go swimming that day?

Cold water swimming in early autumn can obviously stimulate the nervous system, speed up the heartbeat, promote blood flow, and then accelerate the metabolism of the body. Long-term adherence to cold water swimming can achieve a good fitness effect, enhance the body's immunity, and contribute to swimming in winter.

But cold water swimming should be carried out in indoor swimming venues, because the weather after beginning of autumn is obviously different from that in summer, and the outdoor swimming pool will be much colder than before. If the body temperature can't adapt, it is easy to cramp and catch a cold. As the temperature drops, it is best to swim at noon every day when the temperature is high.