1, excluding diseases; Excessive exercise; The intensity of exercise exceeds the range of physical endurance; Sports injuries can lead to knee pain;

2. Normal people can achieve the goal of fitness by exercising for 30 minutes to 60 minutes every day. Such as walking, jogging, doing housework, climbing stairs normally, etc. , no need for extra exercise;

3. For overweight and obese people, anaerobic, load-bearing and endurance exercises should also be done according to their abilities and cannot be forced; Adjusting diet and living habits plus exercise can achieve ideal results.