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Long jump is one of the important events of modern track and field sports, and it is also one of the regular events of major events. Due to the complexity and technicality of the project, the determination of the results in a formal competition is also very complicated. It is easy for athletes to invalidate their results due to fouls by stepping on the jump line. Therefore, it is very necessary to detect fouls. This paper uses a visual sensor technology to design and develop a foul detector for the situation of athletes stepping on the jump line in a long jump, which can detect fouls well. In the formal competition process, because the long jump time is relatively short, the referee is interfered by many factors and it is easy to misread the movements of the athletes and cause misjudgment. Therefore, on this basis, in order to improve the fairness of the game and create a good competition environment, the design is designed. The long jump stepping line foul detector is studied, and the visual sensor technology is used, which can judge the long jump stepping fouls during the long jump based on the feedback data.

Post-stroke depression (PSD) has a significant effect on patients' quality of life and is often accompanied by a decrease in serum brain-derived neurotrophic factor (BDNF) and vascular endothelial growth factor (VEGF) levels. Although exercise is an effective way to improve the body's endocrine environment, traditional high-intensity resistance exercise is not yet readily accepted.To compare the acute effects of high and low resistance training with or without blood flow restriction on perception, BDNF, and VEGF levels in patients with PSD.A total of 24 patients with PSD participated in 2 40% 1- Repetition Maximum (RM) low-intensity resistance training sessions (the low-intensity resistance training group (LOW group) had no blood flow restriction belt; the low-intensity blood flow restriction group (L-BFR group) was required to wear a 120-160 mmHg pressure cuff at the proximal end of the limb) and 1 80% 1-RM high-intensity resistance training session (HIGH group). Elbow venous blood was collected before and after exercise to test for ratings of perceived exertion (RPE), serum blood lactic acid (BLA), BDNF, and VEGF levels.There were no statistical differences between the RPE, BLA, BDNF, and VEGF levels of each group before exercise. After exercise, the RPE, BLA, and BDNF levels of the LOW group increased significantly (P 0.05); the change in VEGF level of the LOW group was not significantly different from that before exercise (P0.05), and the indexes of the L-BFR group and the HIGH group were significant after the increase in exercise (P0.05). Analysis between groups showed that the changes in BLA, BDNF, and VEGF levels in the L-BFR group and HIGH group were higher than those in the LOW group, and the statistical difference was significant (P0.05); there was no change between the statistical difference of the L-BFR group and HIGH group (P0.05). The difference in RPE before and after exercise in the HIGH group was significantly higher than that in the L-BFR group (P0.05) and the difference in RPE before and after exercise in the L-BFR group was significantly higher than that in the LOW group (P0.05). Blood flow restriction resistance exercise may increase the serum BNDF and VEGF levels of PSD patients by increasing the body's BLA concentration. Although its effect is similar to that of traditional high-intensity resistance exercise, subjective physical strength is lower during blood flow restriction resistance exercise.