Expert level questions

Winter swimming is a kind of fitness exercise, not a challenge to the limit. In the water of Antarctica and the Arctic, even with special protective clothing, it only takes 2 to 3 hours at most (there is a tour group in Australia that has done a similar tour) Project). We have a professor from Jilin University in China who swam in Antarctica for only 15 minutes, which attracted quite a lot of attention at the time.

I think it’s still what I said at the beginning, exercise is good for most of our health and well-being. Normal people aim to keep fit, and those who challenge the limits are only a few "supermen"