The main purpose of this study is to develop an understanding of the trainers' perceptions of competency and training needs related to professional skills in accordance with professional experience and academic education. The sample included 76 judo trainers who answered a questionnaire that included a measure that focused on the perceptions of competency and another on training needs. An exploratory factor analysis was used with the maximum probability factor (Oblimin) to determine emerging factors. A comparison of the Coaches ' concepts was made in the training experience and the academic background of the Coaches, where multiple comparisons were applied using ANOVA and Tukey. Three main areas of skills were done: skills related to annual planning; skills related to practice and competition; and personal education and training skills. Coach es' perceptions of their expertise were affected, with low-level trainers classifying themselves at lower levels of efficiency and more training needs; and higher-education Coaches in physical education were more efficient than mid-level trainers. Finally, most trainers consider them as efficient as they have indicated the training needs to be provided, which brings important feedback to the education of trainers. This suggests that trainers are an increasing their knowledge and competence in a wide range of areas that should be considered in future training of trainers programs, also to ensure the quality of education and training in the different level of physical and sports education institutes of the Algerian universities.

Summary The aim of the present study to verify the impact of judo competition on changes in the blood count of judo athletes during an official competition. Also to compare these results with the different weight category. Methods: fifteen youth trained athletes were included in the study were divided into three groups according to weight category (light, medial, and heavy) weight. All subjects performed a 5×4mn round of competition with 15mn of rest between rounds and Complete Blood Count (CBC) were collected before, immediately after the competition, Data are reported as mean and standard deviation. The Shapiro-Wilk test was performed to verify the normality of the data, and the significance level was set at P < 0.05. Blood sample count was tested by a paired Student’s t-test to compare the pre-test and post-test for the three groups. The results showed that blood cell count was significantly decreased immediately after judo competition (p < 0.05). However, red blood cell, White blood cell Blood platelets, Mean Cell Volume were significantly increased after the performance (p < 0.05). The current study showed that the judo competition (Rondori) effectively enhance some blood cell count; these changes are transient and probably due to the adaptation to efforts related to judo competition in highly-trained athletes.

Summary Objective: The aim of this paper was to describe the anthropometric and physiological characteristics of young soccer players (U13) which were associated with their being successful or not as soccer players, and also to determine standard levels in the light of a test battery and indicators to select and guide the young talents as a scientific means to facilitate the selection. Method: A total of 390 soccer players age (U13). From 14 Algerian soccer clubs were enrolled and subjected to standard anthropometric, fitness (speed 20m, CMJ, skills-related performance testing. The testing battery will be described as will the process for converting test data into standardized scores. Data will be presented to show the strengths and weaknesses of some players. Result: After analysing the results based on the standard criteria for the proposed tests as well as the overall performance variable. And the ability of each youth to be selected according to their potential, and therefore it was stressed that the proposed criteria, which are scientific support for the field observation, should be emphasized to facilitate this process for Algerian soccer players. The findings from this study indicate that marked improvements and parameters associated with physical maturity such as height, weight, speed, VO2max, or chronological age are important to determine the success of a soccer player. At older ages, other factors such as agility seem to be more important. Nevertheless, players born in the 1st semester of the year are also more frequent in the older teams. These findings should be taken into account by trainers and coaches in order to avoid biasing their selection choices.

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The aim of this study was to assess the effectiveness of a CrossFit exercises over a period of 8 weeks in a group of high school students during their physical education sessions at the school and to mitigate the deficits in fitness caused by COVID-19 prevention measures. Stuff and Research Methods. 94 students aged 16–17 years were randomly allocated into an included 46 students (2nd level: 12 male and 11 female students; 3rd level: 12 male and 11 female students) and 1 control group included 48 students (2nd level: 13 male 11 female students; 3rd level: 13 male and 12 female students of experimental group (EG) that performed the 8 weeks CrossFit. During the study, students in the control group (CG) were based only on the general physical education and sports program for high school students in secondary school. Physical fitness tests were done: lifting straight legs in height (number times); running on the spot with an intensity of 70 % of the maximum to severe fatigue (c); shuttle run 4× m (with); 60 m run (s) and cross twine (cm). Results of the Research. Our conducted research shows the positive influence of the CrossFit. There are a considering changes, development of the maximum dynamic force endurance, speed abilities, flexibility and mobility in the hip joints of the main groups, In the age aspect, there is mainly the improvement in results with age, both in the main and control groups (p>0,05). Conclusions. The study achieved a significant improvement in the physical condition of the students, also allows to talk about the effectiveness of training, built on the basis of a motivated choice of the target CrossFit high school program.