“Life lies in exercise” is the basic law of life activities, and it also shows people the important way to prevent diseases, eliminate fatigue and obtain a long and healthy life. As a philosophy of life, it is undoubtedly very correct, but in the process of guiding people to specific practices can not be generalized. Because exercise and fitness has its own rules and principles, there are different projects, time, frequency, intensity. In some special circumstances sports exercise is also a “double-edged sword”, the scope of sports injuries is very large, both due to improper exercise caused by chronic “soft injury”; and may be improper action or excessive exercise to form some “hard injury “. Therefore, three hundred years later today should add some qualifications to the “life lies in sports”. That is – life lies in scientific, reasonable and healthy exercise!