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05, d = 0.28-1.00), while changes in these measures in the control groups were not significant (all p ≥ 0.05, d = -0.14-0.15). A series of repeated measures analyses of variance (ANOVA) indicated that (a) the maturity-related differences between jump training groups were observed only for reactive strength index, and (b) the improvements in all measures of neuromuscular performance were greater in jump training than in control group. This study demonstrated that important components of physical fitness in 12-14-year-old schoolboys may be acutely enhanced through a well-structured jump program and maturity seems to at least play a limited role in mediating these enhancements.Strength training in youth soccer has both a preventive and a sports-specific component. Whole-body electromyostimulation (WB-EMS) could represent an interesting time-saving add-on to classical strength exercises in performance-oriented soccer. https://www.selleckchem.com/products/GDC-0449.html The objective of this study was to find out whether a 10-week superimposed WB-EMS training might have a more positive impact on strength parameters in male youth elite soccer players than regular athletic strength exercises alone. A total of 30 male youth soccer players from a youth academy aged 15 to 17 years participated in the study. Before and after the intervention, the isometric extension and flexion forces of trunk and knee, and the hip abduction and adduction forces were tested. Twelve players (control group) absolved a conventional 20-minute strength training once a week for a period of ten weeks. Eighteen players absolved the same exercises but with superimposed WB-EMS. Blood creatine kinase concentration was measured for training control. ANOVAs, Friedman tests and post hoc t-tests were calculated (p = 0.05) to examine the strength development during the training period between the groups. While we could not find significant strength increases in the leg, hip and trunk muscles in the control group ( less then 4%), the strength of the WB-EMS group improved significantly in 4 of the 6 muscle groups tested. In this group, the strength of knee flexors increased significantly by 20.68 ± 21.55%, knee extensors by 31.43 ± 37.02%, hip adductors by 21.70 ± 12.86% and trunk flexors by 33.72 ± 27.43%. The rates of strength increase are partly in line with other studies, partly clearly higher, which might be explained by the athletically active target group. A 10-week superimposed WB-EMS training improves the strength of certain leg, hip and trunk muscles in male adolescent elite soccer players to a greater extent than a pure athletic strength training of the same duration.The role of cognitive training in sports has experienced a recent surge in popularity. However, there is a paucity of longitudinal trials examining the effectiveness of related methods. This study aimed to investigate the impact of a cognitive training with minimal motor components on lower limb choice-reaction performance. A total of 44 healthy individuals (26.4 ± 3.7 years, 27 males) were randomly allocated to a cognitive training (CT) or an inactive control group (CON). The CT group participants, three times per week, engaged in a computerized exercise program targeting skills such as attention, reaction time, processing speed or inhibition control. Before and after the 6-week intervention period, lower limb choice-reaction time was assessed using the Quick Feet Board device. An ANCOVA of the post-intervention values, controlling for baseline data, demonstrated superior unilateral choice-reaction performance (stance on dominant leg) in the CT group (p = 0.04, r = 0.31). Conversely, no difference was found for the bilateral component of the test (p > .05). Off-court cognitive training may represent a suitable method to enhance reactive motor skills in athletes.The diagonal shot (DS) and straight shot (SS) using the forehand loop are the most common techniques used in table tennis. The purpose of this study was to investigate the kinematic differences of the lower limbs between DS and SS. Twelve male table tennis athletes performed DS and SS in random order. Kinematic data were captured using a three-dimensional Vicon motion analysis system. The major findings of this study were that DS showed significantly less time compared with SS during the backward swing (BS) and the forward swing (FS) phases. Meanwhile, DS showed significantly larger ankle internal rotation and inversion with smaller knee abduction and external rotation during the BS. DS showed significantly larger knee extension with smaller hip adduction and knee internal rotation compared with SS during the FS. However, SS showed a significantly larger range of motion (ROM) of ankle plantar flexion external rotation, and significantly larger ROM of knee extension. Moreover, SS showed significantly larger knee internal rotation compared with DS. These differences between the two shot techniques could be beneficial for helping coaches and table tennis athletes optimize performance, both in training and competition.Self-talk is helpful in motivating shooting athletes and promoting effortful behavior. This study aimed to examine how the degree and intensity of self-talk of shooting athletes during matches affects their actual internal motivation and careers. In particular, the primary objective was to determine the effects of the level and intensity of self-talk on the effort value, fun and interest, tension and anxiety, and competence of intrinsic motivation for different levels of achievement and athletic performance. One hundred seventy participants who were shooting athletes registered with the Korea Shooting Federation (national team, n = 55; high performance team, n = 62; general team, n = 53). The self-talk questionnaire was developed to measure the Test of Performance Strategies (TOPS). The intrinsic motivation scale developed and applicable to sports situations was used to measure the motivation of the shooting athletes. Significant differences were observed using MANOVA as well as the basic statistics of intrinsic motivation by self-talk. The intrinsic motivation self-talk was correlated to effort value, fun and interest, and competence. There was a significant relationship between shooting athletes' self-talk and intrinsic motivation. This study indicated that athletes using self-talk experienced more fun and interest, and they perceived higher effort value and competence. Further, the multiple regression analysis revealed that self-talk affected the intrinsic motivational factors of effort value and fun and interest.
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