1, fatigue fatigue, overload fitness will appear fatigue phenomenon, resulting in a long-term state of fatigue, it is difficult to recover after rest. Once the body is too tired after fitness, it is necessary to consider whether it is excessive exercise, and it is necessary to shorten the exercise time and reduce the exercise intensity.

2, muscle soreness overload fitness may also cause the body to produce a lot of lactic acid, which can not be completely consumed in a short time, leading to muscle soreness and lumbar muscle strain. General fitness muscle pain can be recovered within 1 ~ 2 days, but muscle pain cannot be recovered for a long time after overload training.

3. Heart discomfort will occur after overload exercise, because the heart is in a state of violent beating during exercise. After stopping exercise, the heart is difficult to calm down and the heartbeat is accelerated, which is not conducive to heart health. Therefore, we must train within the range that the body can bear, so as not to affect our health.