ABSTRACT Introduction: According to the background of the healthy aging population and national fitness care, rapid development has begun in national sports in China. This development is the result of current research on the current scenario. Objective: Study the effects of exercise on the rehabilitation of middle-aged and elderly people with sports injuries. Methods: Twenty individuals were recruited for the experiment; the experimental group received the rehabilitation exercise protocol three times a week for four weeks, while the control group maintained the original lifestyle with no exercise or vigorous exercise. Results: It was found that there was no significant difference in height, weight, and body fat percentage after the aerobic exercise intervention training protocol (P>0.05), but there was a significant difference in BMI between the experimental group and the control group after the intervention training period (P<0.05). The VAS score of the experimental group before and after training decreased from 5.49 to 0.90, showing a significant effect, indicating a significant difference between the experimental group before and after training (P<0.05). Conclusion: The research shows that exercise positively affects the prevention and rehabilitation of sports injuries. The results obtained can help groups in national fitness. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.