Why is phisical activity so important for people?

Почему физическая активность так важна для людей?

It is believed that exercise is good for you. A sedentary lifestyle can lead to disease and premature old age. If you exercise just 20 minutes a day, you will feel that the body is warmed up, you have a burst of energy, and to eat I absolutely do not want. This is due to the active metabolism that reconfigures your body. Active exercise cause the action of natural drug for the body - endorphins, and from them we have lifted the mood and we want to enjoy the life. Of course, exercise makes the body elastic and strong sleep.