The purpose of our running is to exercise. The most reasonable running form is aerobic jogging, running for 40-60 minutes each time, and taking a rest after running for 3 days 1 day, or taking a rest after running for 4 days 1 day.

Your running style is unscientific. Running 10km every morning and evening will lead to excessive exercise. Your body is bound to be in a state of fatigue, which will accumulate over time and become deep fatigue. Deep fatigue is the taboo of running, which will not only bring hidden dangers of injuries, but also make you tired and listless, and your physical fitness will gradually decline. This goes against the original intention of exercise.

Running once in the morning and once at night will take up a lot of time. It takes at least one and a half hours to prepare, warm up, run and stretch. We still have to work, study and live. We are not professional athletes, so there is no need to spend all our precious time running.

What is the so-called "muscle loss"? When ordinary runners do aerobic jogging, the average pace is mostly beyond 6 minutes. If they run 10km, it will take more than an hour.

Running needs consumption. Energy substances that provide energy for muscles are mainly sugar, fat and protein. These energy substances stored in our bodies are limited, and most of them can support us to jog for about an hour.

If you jog for more than an hour. When the stored energy in the body is exhausted, the body can only decompose protein in muscles as energy supply.

This is also the phenomenon of "losing muscles" passed down from mouth to mouth.

In order to prevent the phenomenon of "losing muscles" during aerobic jogging, we usually control the time of aerobic jogging within the range of 40~60 minutes each time.

This can not only maximize the exercise effect of aerobic jogging, stay away from injury, but also prevent the body from consuming protein in muscles.

Jogging once in the morning 10km may lead to "muscle loss". If you jog again at night 10km, muscle loss is certain.

There are many people around us who run twice a day or a horse and a half a day. If you look closely, you will find that most of them are thin and haggard, and their running ability may not improve much.

Conclusion Running should be based on scientific rationality.

Without good nutrition, scientific recovery means and necessary resistance training, ordinary people had better not try jogging in the morning and evening 10km.