South health

This question is a bit difficult. First of all, we should analyze how to divide North and South. According to the current division method in China, the Qinling Mountains and Huaihe River are divided. Then the north and south banks of Huaihe River belong to the north and south, and the physical difference is generally not big, haha! From a purely physiological point of view, northerners are better than southerners. From ancient times to the present, northerners are good at herding and hunting, while southerners are diligent in farming. The climate in the north is cold, the sunshine in the south is abundant, and the climate is hot, which leads to the shorter maturity and smaller size of southerners, the salty eating habits in the north and the light eating habits in the south. This is also because northerners consume a lot of electrolytes during grazing and hunting, so their health is better than that of southerners, but it is not good for their health. Based on the above analysis, my personal opinion is that northerners have better physical fitness than southerners. But if brain power is counted as part of physical fitness, southerners will have an advantage in this respect.