In ancient times, humans moved an average of 16,22 kilometers a day  They walked, ran, sprinted, climbed, swam, jumped, and lifted weights  They have to do so, otherwise it will be difficult for them to survive  In 500000 years of evolution, the thinking brain that modern people have evolved from the training of motor skills, and human beings gradually have the ability to dream, plan and create, thus creating modern civilization  But the irony is that civilization is moving so fast that human bodies and genes don't have time to keep up-as far as genes are concerned, we are still the hunter-gatherers of 500000 years ago, and we still crave the highest calorie food  but no longer need to exercise
In the end, the sedentary modern way of life has become one of the major threats to the long-term survival of mankind
The benefits of exercise to human evolution