At present, the motion control algorithms of lower limb exoskeleton robots have errors in tracking the desired trajectory of human hip and knee joints, which leads to poor follow-up performance of the human-machine system. Therefore, an iterative learning control algorithm is proposed to track the desired trajectory of human hip and knee joints. In this paper, the experimental platform of lower limb exoskeleton rehabilitation robot is built, and the control system software and hardware design and robot prototype function test are carried out. On this basis, a series of experiments are carried out to verify the rationality of the robot structure and the feasibility of the control method. Firstly, the dynamic model of the lower limb exoskeleton robot is established based on the structure analysis of the human lower limb; secondly, the servo control model of the lower limb exoskeleton robot is established based on the iterative learning control algorithm; finally, the exponential gain closed-loop system is designed by using MATLAB software. The relationship between convergence speed and spectral radius is analyzed, and the expected trajectory of hip joint and knee joint is obtained. The simulation results show that the algorithm can effectively improve the gait tracking accuracy of the lower limb exoskeleton robot and improve the follow-up performance of the human-machine system.

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Mental health is a kind of emotional state, a good psychological state can have a positive impact on a person, physical exercise can have a positive impact on the psychological state of college students, prevent the generation of negative emotions, improve the bad emotional state, and then promote the mental health of college students. Health is an inevitable requirement to promote the all-round development of people and a basic condition for economic and social development. Health education should be incorporated into the national education system to promote the national health of the people through sports. Young people are the main force and backbone of national and social development. In order to realize the Chinese dream of great rejuvenation, we must attach importance to the development of young people and the physical and mental health of young people. In the process of compulsory education, middle school and high school period is a key stage in the gradual formation and development of students' psychology and body, but due to the large audience of China's education, the competition is more intense, which inevitably causes a lot of students to focus on exam-oriented education and neglect physical health, especially in recent years, the mental health issues of increasing concern. Through the research situation of mental health in China and the concept of mental health quality, this paper analyzes the problems of sports and mental health, and puts forward some corresponding suggestions for the problems, which has reference significance for promoting students' mental health.

Introduction: The main clinical feature of chronic nonspecific low back pain (CNLBP) is lower back pain, and suspension sports therapy has a specific effect in this case. Objective: To investigate the changes of flexion-relaxation phenomenon in patients with lower back pain after core control training of suspension exercise therapy (SET). Methods: 84 subjects who met the inclusion and exclusion criteria of chronic low back pain in this experiment were randomly divided into an experimental group and a control group. The experimental group was treated with suspension training. The control group only received acupuncture. We then determined the muscle fascia tension and core stability of the lower lumbar region. Results: The visual analog scale (VAS) and Oswestry dysfunction index (ODI) evaluations of the two groups of patients were different. Conclusion: Suspended core stabilization training has a significant long-term effect in reducing lower back pain and improving waist function in patients with chronic nonspecific low back pain. Level of evidence II; Therapeutic studies - investigation of treatment results.