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Performance sport requires higher and higher physical demands, the explosive component becoming an increasingly important role. Explosive force can be tested with instruments that can have more or less accuracy. The Just Jump system is one of them, based on the method of determining the height of the jump by using the flight time. This study aims to help adjust the results displayed by Just Jump during use to determine the explosive strength of the lower limbs so that they are as accurate as possible. A lot of 14 female handball players (19,21±1,47 ani, 172±5,14 cm, 69,21±4,3) was tested with the help of Just Jump and Optojump, and a high-precision system, to determine the equation that can adjust the results of the first one. The paper has a practical application, given the trend of continuous monitoring of progress of athletes during the training program. The pressure mat through its physical features, jumping biomechanics, and geographic parameters of the area where the test applies can influence the result displayed by the Just Jump center unit. Consequently, we determined a corrective formula for Just Jump results by reference to Optojump.

The evaluation and identification of VO2max and MAS are essential to determine the level of aerobic exercise capacity among soccer players, the training volume and intensity, and the means to use for developing specific game parameters. The primary purpose of my study was to assess how the aerobic component of physical training can be completed during the competitive period, only using technical and tactical tracks executed with the ball or via possession drills in a soccer team. The study included the evaluation of VO2max, MAS, through a field trial and heart rate throughout the trial (Hr) and maximum heart rate recorded during the trial (Hrmax). Regarding VO2max, I found no statistically significant difference (t=-0589, p=0.564) between the value of initial_VO2max (M = 59.217 ml-1kg-1; DS = 2.247) versus the value of final_VO2max (59.394 ml-1kg-1; DS = 2.05). The same was found concerning MAS, where data analysis did not show any statistically significant difference (t=-023, p=0.821) between the value of initial_MAS (M = 16,59 km/h; DS = 0.626) versus the value offinal_MAS (M = 16.611 km/h; DS = 0.579). These findings open up avenues for further research in the field of soccer training and can guide future studies on aerobic exercise capacity in soccer players.

It is well known, although a challenge for the researchers, that chess players tend to have superior intellectual abilities and the idea that chess practice makes people more intelligent became more and more popular. The aim of the present study was to examine the effect of chess playing on the intellectualdevelopment of primary-class students. 67 children were initially tested (Stegariu, 2019) from whom only 27 of them were retested using the Raven Standard Progressive Matrices. 21 were originally inthe beginners group, and 6 of them migrated from the control group. Results indicated that chess playing had a significant effect on the SPM performance. The results are statistically significant (p=0.043

Soccer has become a genuine industry, where science has been acquiring an ever more defined place. Specialists in the field are looking for solutions to a better detailed and more precise monitoring process for players. In the current research, we propose to use such a tool, namely the InStatgame report, to assess the possible physical effects produced by the forced break imposed by the Covid-19pandemic.We have analysed a Romanian first-league professional soccer team, in terms of the exercise capacity reflected in the InStat Fitness report for two moments: before the enforcement of the emergency state and after lifting the social restrictions, when the competitive season resumed. We wanted to assess to what extent and at what level modifications occurred in the players’ exercise capacity. In our analysis, we have taken into account the following aspects: the total distance covered during the game, the distance covered pacing(0-2 m/s), jogging(2-4 m/s), running(4-5.5m/s), the distance covered accelerating(5.5-7 m/s), the distance covered sprinting(>7 m/s), the number of accelerations, and the maximum speed reached. From among them, only the distance covered accelerating recorded statistically significant alterations, dropping from626.6±267.5 m, in the first game, la 390.4±290.1 m, during the game played after resuming the competitions. The main conclusion is related to the fact that a forced break caused by various reasons may lead to a decrease in the anaerobic lactacid capacity of the soccer players.

The effort specific to the soccer game is mixed, and an important percentage is represented by the aerobic effort, under all its forms of manifestation. The purpose of our research was to assess vVO2max and tlimVO2max in soccer players, by making a comparison between two different periods: the end of the pre-competitive period (when it is considered that players have finished their training and that they have reached a plateau in their athletic shape) and the end of the competitive period. We aimed at following the evolution of these parameters, from the perspective of the specific means used in planning. Our findings indicate, except for insignificant differences, approximately equal values of VO2max and vVO2max in the two periods but also a statistically significant drop (p=0.0001) in the level of tlimVO2max. The means used during training explain both the constancy of VO2max and vVO2max, and the decrease in tlimVO2max.