In this study, the inverse kinematics mathematics computer intelligent algorithm model is used to study the sports injuries of the elbow joint of adolescents. At the same time, we simulated the movement parameter changes during the rehabilitation training of the patient’s wrist and proposed a joint angular velocity function based on cubic fitting. Research has found that when the training scene changes greatly or the target task is changed, the smoothness of the elbow joint movement will change. The research conclusions of this article provide a theoretical basis for the selection of man-machine action points and the formulation of rehabilitation training methods. This article establishes the degree-of-freedom simulation model of the operating arm, which is the number of independent position variables in the operating arm, and these position variables determine the positions of all parts in the mechanism.

Introduction: Long-distance running is a typical physical endurance sport. The athletes’ fitness level plays a dominant and central role in the components of their competitive ability. Whether long-distance runners can win in fierce competition depends mainly on the endurance of their physical fitness. Objective: To analyze the physical training methods of long-distance runners and discuss the improvement of speed and strength of long-distance runners through physical training. Methods: This paper uses literature materials, expert interviews, and experimental methods to research the training practice of middle and long-distance runners in colleges and universities. The data collected comprised an experimental protocol performed on volunteer long-distance runners. The above research determined the effect of physical training on speed and strength in long-distance runners. Results: After the 12-week experimental intervention, the overall strength, flexibility, and flexibility of the long-distance runners were improved, and the data were statistically significant (P<0.05). The aerobic workability and anaerobic capacity of the athletes were improved through the experiment. Conclusion: Physical training can improve the speed and strength of long-distance runners. Athletes can increase physical training with this protocol in their daily training. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

Introduction: The formation and propagation of pulse waves are mainly accomplished by coordinating the heart and the vascular system. The contraction and relaxation of the heart are the sources of pulse waves. The aorta vibrates regularly as the heart contracts. This vibration propagates forward along the elastic blood vessel to form a pulse wave. The pulse wave contains very rich physiological and pathological information about the cardiovascular system. If there is a problem with the heart's structure, it can cause abnormal pulse waveforms. Objective: This article analyzes pulse waveform changes and blood flow during high-intensity interval training. It combines the test results to guide the exercise rehabilitation treatment of patients with chronic diseases. Methods: Pulse waves were collected from subjects under different exercise loads and the characteristics of pulse wave parameters under intermittent exercise were studied. Results: An athlete's pulse wave response is different in the case of high-intensity intermittent exercise. There are differences in the cardiovascular response of patients with different body weights. Conclusion: High-intensity interval training can improve the cardiovascular function of patients with chronic diseases and affect their pulse waveform. Level of evidence II; Therapeutic studies - investigation of treatment results.

Football sports can easily lead to a calf strain and tendon damage. To this end, we explored the therapeutic effect of sodium hyaluronate biomaterial-assisted micro-suturing in treating calf tendon injury after football sports. Given this, we will group the patients to compare the test and conduct the efficacy analysis. One group was sutured by ordinary microsurgery. The other was sutured and combined with sodium hyaluronate treatment. The study found that there were statistical differences in tendon recovery between the two groups of patients. Sodium hyaluronate biomaterial can improve the treatment effect of calf tendon injury in football sports. This biological material is worthy of clinical application.