The goal of the research was to determine the effects of six weeks of isoinertial training on explosive strength, speed, and agility compared to traditional strength training in tennis players. The subjects, thirty male tennis players aged 20 to 35, were divided into three groups: the experimental group 1 (E1; n=10), which performed strength training on an isoinertial device; the experimental group 2 (E2; n=10), which performed traditional strength training; and the control group (C1; n=10). E1 and E2 groups had a total of six weeks of training with two training sessions per week, with three exercises per training session performed in four series for six to eight repetitions. The results showed that isoinertial strength training has a positive effect in the variables squat jump (SJ), countermovement jump (CMJ), 5-meter sprint (5M), 20-meter sprint (20M), agility T-test (T-test), and 505 agility test (505). Post hoc analysis revealed that there are significantly better effects of isoinertial training compared to isodynamic training in the countermovement jump (CMJ), 5-meter sprint (5M), and 20-meter sprint (20M). The E1 group had significantly better results than the C1 group in all tests. The E2 group had significantly better results compared to the C1 group in the variables SJ, 20M, and T-test. The results also show that six weeks of isoinertial training produce better results in the development of variables CMJ and 20M compared to the traditional strength training group. Accordingly, fitness and tennis coaches should also use this training method when working with tennis players.

The purpose of the present study was to compare game-related statistics between men's and women's under-17 (U-17) basketball teams and to identify game-related statistics that discriminate between winning and losing teams for both sexes. Games with a final score difference greater than 30 points were excluded from the analysis, so the final sample consisted of 196 games (109 men's and 87 women's games) from the 2022/2023 season of the Triglav Cadet League of Serbia. The following game-related statistics were gathered from the official box scores of the Basketball Federation of Serbia: 2- and 3-point field-goals (successful and unsuccessful), free throws (successful and unsuccessful), defensive and offensive rebounds, assists, steals, turnovers, blocks (committed and received), and fouls (committed and received). Men's teams had significantly better values than women's teams in successful and unsuccessful 2-point field-goals, successful 3-point field-goals, successful and unsuccessful free throws, assists, and turnovers. Women's teams had statistically better values than men's teams in unsuccessful 3-point field-goals, offensive rebounds, steals, and committed fouls. The discriminant factors between winning and losing teams in close games, were successful 2-point field-goals, defensive rebounds and assists for both sexes, and offensive rebounds for men's teams. In balanced games, discriminant factors were assists for both sexes and successful 2-point field-goals for women's teams. In unbalanced games, discriminant factors were assists for both sexes, defensive rebounds for men's teams, and successful 2-point field-goals for women's teams. These findings suggest that there are notable differences in game-related statistics for U-17 men's and women's basketball teams.