Search

The reform and development of Chinese professional football have spanned over three decades, during which the Party and the state have always attached great importance to the development of Chinese football. Continuous efforts have been made to deepen the reform of Chinese football and boost the confidence of Chinese professional football, thereby contributing to the overall improvement of its level. By using methods of literature review and logical analysis, this paper systematically clarifies the historical evolution of the reform and development of Chinese professional football. From both macro and micro levels, it delves into the driving forces behind the reform and development of Chinese professional football and, based on these findings, proposes targeted safeguard measures, which include building a management system with clear hierarchy and responsibilities, strengthening the social responsibility of Chinese professional football clubs, establishing a supervision system featuring clear division of labor and multi-party collaboration, developing a new reserve talent cultivation system under the " whole-nation system", accelerating the reform of equity structure in Chinese professional football clubs, maintaining and stabilizing the order of the Chinese professional football market, and strengthening the construction of professional football talents in Chinese professional football. The aim is to provide theoretical guidance and practical reference for promoting the reform and development of Chinese professional football and the high-quality development of Chinese football in the new era. [ABSTRACT FROM AUTHOR]

RPE is widely used to monitor and evaluate the internal training load of tennis players due to its economical and convenient advantages. However. RPE may be disturbed by non-objective factors, which will inevitably affect the accuracy of evaluating and the next step training plan made for coaches. In actual training, there is still a lack of relevant researches on how coaches should reasonably use RPE indicators to evaluate the internal training load of athletes. In this study, 24 players (12 males 12 females) of the Chinese national tennis training team were selected as the study objects. They were grouped into gender: male and female athletes. At the same time, the exercise forms were divided into two states: training and competition. The results showed that: 1. The correlation between RPE and the average maximum heart rate percentage and the maximum heart rate was low in the two states of training and competition; 2. In the competition state, s-rpe was significantly correlated with Banister's Trimp and Edwards's TL of all team members (P < 0,05), while in the training state. the proportion of significant correlation was 50% and 41,7% respectively (P< 0.05). Therefore, RPE indicators were more objective in evaluating the internal load in the competition state. 3. In the training and competition state, The correlation between the RPE indicators and the heart rate indicators of female players is significantly higher than that of male players, Therefore the RPE indicators are more objective in evaluating the internal training load of female players. This study will provide reference for the objective evaluation of RPE in the field of professional tennis in China for the rational use of internal training load. [ABSTRACT FROM AUTHOR]

Objective: The early symptoms of knee osteoarthritis ( KOA) are not obvious. therefore there are a large number of patients with knee joint lesions thai have not been detected. In order to screen high-risk groups or earlystage patients with KOA on a large scale, this study established a quantitative prediction model for the risk of KOA through simple and easy-to-measure indicators. Methods: According to age and sex proportion. 1045 residents from two streets in Nanjing were sampled for KOA diagnosis and physical fitness tests. The test indicators included gender, age, height, weight, BMI, thigh circumference, 30-second sitting and standing, knee joint flexion, single-leg standing with eyes c·losed. and time-up-and-go test. In GeNle 2.3 software, a mathematical mo(le[ between KOA and the al,ove indicators was established through Bayesian network learning. The modeling sleps include data discretization, structural learning using mountain climbing algorithm and K2 algorithm, parameter learning using Expectation-Maximization algorithm, model verification and sensitivity analysis. Results: Univariate analysis showed that there were statistically significant differences between the groups of "no KOA" and "KOA" in the 10 indicators (P<0.01 ). The established mathematical model included 11 nodes und 19 directed line segments. Determining the slate of any one or more nodes can predict the probability of KOA disease. In the model. gender, BMI. body weight, 30-sec·ond sitting and standing, and knee joint ile>don were nodes that were directly related to KOA or had higher sensitivity. These indicators had high predictive value. lhe accuracy of the. model was 78.9%, and the area inider the ROC curve was 0.722. ConcluMion: This study has constructed a Bayesian network model for quantitalively predicting the risk of developing KOA, which exhibits good predictive performance and has advantages for widespread application. [ABSTRACT FROM AUTHOR]

The article discusses the result of a study concerning the objective system of theory instruction in the continuing education of Chinese professional football club managers. It was found that the core contents of the system of theory instruction include professional football theory, sports marketing and sports legislation.