It is a normal physiological phenomenon that the whole body is sore after a long time of no exercise. The reason for the soreness is that in daily life due to the lack of appropriate physical exercise, resulting in muscle strength is relatively weak, muscle size is relatively small, the load that can be borne is also relatively small. However, once you start exercising, the load on your muscles increases, and the metabolic products produced by your muscles during exercise, such as lactic acid, accumulate in large quantities, thus causing generalized soreness. In addition, due to the relatively poor muscle quality, in the process of exercise will inevitably lead to mild muscle damage, or even more serious damage, will also lead to generalized pain, but the vast majority of them will be relieved after gradual non-exercise.