The relationship between daily running time and health is a complex issue, and many factors need to be considered. Generally speaking, running can promote cardiopulmonary function, enhance immunity, reduce stress and improve sleep quality. But at the same time, you need to pay attention to your physical condition and avoid excessive exercise.

There are two possible views on the problem that running 5 kilometers every day is between 30 minutes and 45 minutes:

1.30 minutes is good for health: According to the research of exercise physiology, running for 30 minutes can consume glycogen in the body, thus promoting the decomposition and metabolism of fat. Therefore, running 5 kilometers a day for about 30 minutes may be more conducive to reducing fat and keeping healthy.

2.45 minutes is good for health: running for about 45 minutes may be more conducive to the exercise and promotion of the body's immune system and cardiovascular system. In addition, the running time can also be adjusted according to one's physical condition and exercise habits. If you are in good health, the running time can be extended appropriately.

In short, the daily running time needs to be adjusted according to the individual's physical condition and sports goals. Generally speaking, it is recommended to run 3-5 times a week for about 30-60 minutes each time. In addition, pay attention to warm-up and stretching before and after running to avoid injury.