Practice makes true knowledge. Many rules about running are personal experiences and ideas of some runners, and then they are shared with other friends, and word of mouth gradually becomes a kind of knowledge.
Scientific running breaks are intermittent breaks according to one's physical condition. The most scientific running breaks are running one break and one rest. Of course, you can also choose to run two breaks and one rest, but don't run every day. The reasonable running frequency is running one break, that is, running 3-4 times a week, with intervals every time. This scientific method is also our way to prevent injuries. Scientific experiments show that after an effective exercise, the human body will have slight injuries to muscles and body tissues. After a good rest and 48 hours of nutrition supplement, the body will recover itself, but if we don't have enough time to rest and recover, it will break down from overwork and cause injuries. Sleep and rest are good means of recovery. As ordinary runners, the purpose of running is health, not professional competition, so we don't need to pursue running quantity excessively. Therefore, we must adhere to the principle of taking a break during running, and arrange running reasonably according to our own health, life, family and other conditions. The running quantity doesn't have to be increased every week. The premise of increasing the quantity is that you are comfortable, relaxed and full of energy in the previous runs, and you don't feel pain in all parts of your body after running.