Introduction: The purpose of physical training for athletes is to maintain and improve athletes’ coordination, reaction ability, spatial orientation, anti-load ability, endurance, and other abilities. But the problem of injury in sports must be solved. Objective: To investigate the causes of athletes’ injuries during physical training and proposes solutions for them. Methods: A questionnaire was applied to athletes to learn about their injuries in recent sports and their methods to avoid injuries. Results: Insufficient warm-up is the most common cause of injury. Other causes include site factors, fatigue, and excessive load. Sports injuries are the most common in extracurricular activities, while injuries are the least in sports training. The season in which the most damage occurs is winter, followed by autumn, and while spring shows the least injuries. Conclusion: The cause of sports injuries in physical training is related to insufficient warm-up activities. Physical training instructors should continuously improve their teaching level and provide athletes with the correct knowledge and skills to prevent sports injuries and protect themselves. As a result, the probability of sports injuries can be reduced as much as possible. Level of evidence II; Therapeutic studies - investigation of treatment results.

Introduction: There have been many reports on athletes’ cardiovascular function, but there are very few methods used to evaluate the case. Objective: This article studies the relationship between sports fatigue and the cardiovascular response of athletes so that athletes can exercise and train more scientifically and safely. Methods: The paper selected some national athletes from 2017 to 2020 to carry out the VO2max, step test, YoYo test, 12-minute running, and other tests related to the cardiovascular function. Results: Athletes can promote the improvement of their cardiovascular function when they perform aerobic exercise training. Conclusion: Public physical education and amateur physical training should focus on the development of aerobic endurance. This can improve athletes’ cardiovascular function. Level of evidence II; Therapeutic studies - investigation of treatment results.