![]() ![]() Similarly, young players who trained for maximal strength (by using the leg press) improved their performance in jumping and sprinting. found a positive correlation among sprints performance, squat jump, and maximal strength (1 RM during a back squat). ĭuring a soccer match, young soccer players perform approximately 10–15 seconds of sprints (5, 10, and 20 m) every 90 seconds of the game (11% of the total match). This intensity is similar to that of an adult (80–90% HR max), with the frequency values slightly higher due to a higher maximum heart rate that is age-dependent. The average intensity in young players during a soccer match, on a regular-sized pitch, ranges from 165 to 171 bpm, about 85% of the HR max. highlighted that the players with a higher VO 2 consumption during the game also had a lower blood lactate concentration due to their higher capacity to remove the lactate during high-intensity intermittent exercise. found that the values of VO 2max differed in relation to the role played by the individual players (defenders/attackers/midfielders). In the latter study, the average value of the VO 2 max in elite young players was 64.3 mL∙kg -1 ∙min -1, with a maximum value of 73.9 mL∙Kg -1 ∙min -1. By considering the duration of the game (70–90 min) and the values of maximal oxygen consumption (VO 2 max, 64.3 mL∙Kg -1 ∙min -1), the soccer game appears to be dependent upon the aerobic system. Elite soccer players, during the match, are able to run approximately 10 km at an average intensity close to their anaerobic threshold (80–90% of maximal heart rate). ![]() The several distances, covered at different intensities, are able to stimulate either the aerobic and anaerobic systems, as soccer is a sport that is characterized by intermittent periods of high speed and low speed. However, the total distance covered by the young soccer players was lower than that observed in adults. Their results showed that the players in the under 16 (U16) group covered greater distances than the players from U12-U13-U14 groups, in all the distances analyzed. conducted a match analysis on young soccer players (12–16 years old), investigating the various distances covered in relation to the intensity levels the total distance covered and the distance at high (4.0–5.5 m∙s -1) and very high intensity (5.5–7.0 m∙s -1) during an official match. Therefore, the performance is affected by internal and external factors. jumping, kicking, sprinting, changing pace and direction), that given the different situational components, are affected by the external factors such as the presence of adversaries, the characteristics of the playing surface, and the weather conditions. Soccer players perform a large variety of ballistic exercises distinguished from a kinematic point of view by high velocities and accelerations throughout the entire movement (i.e. In the present study, we cannot exclude the influence of growth and maturation on some performance variables therefore, the monitored adaptive responses should be considered as the possible results of an interaction between the applied training load and maturation. These results highlight that, in long-term training, the monitoring of the adaptive responses in relation to the training load may provide a guideline to optimize the trainability of some performance variables in young elite soccer players (13–15 years). The following performance variables were measured: explosive strength, pre-stretch augmentation (CMJ-SJ), leg stiffness, short sprint performance, aerobic endurance, maximal heart rate, and speed-strength endurance. The testing sessions were performed at the beginning of the preparation period in the first (T1), second (T2), and third year (T3). ![]() Nineteen players, with seven years of training experience (age: 13.3 ± 0.1 years body weight: 57.9 ± 4.9 kg height: 168.9 ± 4.7 cm BMI: 20.1 ± 1.1 kg/m 2), voluntarily participated in the present study. The purpose of the present study was to investigate the explosive strength and endurance adaptations in young elite soccer players who underwent a supervised training program for a period of two years. ![]()
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