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Objective: To assess the discriminative ability of several fitness dimensions and anthropometric attributes for forecasting competitive success in female karate athletes. Methods: Fitness and anthropometric data from 98 female junior karatekas obtained during the training camps of the Spanish National Karate Federation between 1999 and 2012 were used. Binary logistic-regression models were built to ascertain whether the set of fitness and anthropometric variables could predict future sporting-performance levels. For this purpose, participants were classified as elite (medalist in World or European Championships in the senior category) or subelite (at least a medalist in Spanish National Championships in cadet or junior but not included in the elite group), according to the results achieved up to 2019. Results: Participants who were subsequently classified as elite karatekas showed significant differences in agility, upper- and lower-body muscle power, and general fitness in comparison with those who were classified as subelite in the senior category. A total of 57 junior female karatekas who were subsequently classified as elite (7) or subelite (50) were included in the binary logistic-regression analysis. Resultant models showed significant capacity to predict karate performance. Conclusions: Assessing physical fitness in junior categories can be a useful resource to determine future karate success. Coaches in this sport should pay special attention to the levels of muscle power and agility shown by their athletes, as both fitness dimensions could be indicators of future sportive success.

Despite the many studies on physical and physiological features of combat sport athletes, there has been considerably less consideration of psychological factors. Here, we present a narrative review of literature related to perceptual-cognitive skill in combat sports that require the athlete to score points by hitting or touching the opponent's body with the hands, feet or weapon: boxing, French boxing, fencing, kung fu (wushu), karate, taekwondo and other martial arts. Based on a thorough search of literature, we synthesised findings from empirical studies on Reaction Time, Anticipation, Visual Search and Information Pick-up. Contrary to the belief of coaches, there was no clear consensus regarding Reaction Time being a good predictor of success in combat sports. However, consistent with findings from other sports, expert combat sport athletes better anticipate the opponent's actions based on information perceived before and during the attack. This is likely facilitated by experts using a gaze fixation strategy (i.e., visual pivot) that facilitates information pick-up. In the final section, we present a model that describes how the evolving perception-action relationship between the attacking athlete and opponent depends on distance, attack progression and opponent reaction. Suggestions are provided for training and for future research in combat sports.

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Ayán Pérez, C, Martínez de Quel, Ó, Álvarez Pérez, S, and González Baamonde, S. Influence of the box dimensions on the reliability and validity of the sit and reach in preschoolers. J Strength Cond Res 34(9): 2683–2692, 2020—This study aimed at analyzing the reliability and validity of the sit and reach (SR) test, when it was performed with a standard SR (SSR) or an adapted SR (ASR) box in preschoolers. To accomplish this, both tests were administered 3 times (familiarization, test, and retest) to a group of 148 children (mean age, 4.99 ± 0.94 years; 49.3% girls), with a week interval between each assessment. The obtained results in each test were compared with those obtained in the passive straight leg raise (PSLR) test with the aim of identifying their construct validity. The internal consistency was found to be between good and excellent for the SSR (α: 0.83–0.92) and excellent for the ASR (α: 0.92–0.96). The SSR showed a good and a fair reliability (intraclass correlation coefficient [ICC], 0.71–0.86), whereas the ASR showed an excellent reliability (ICC, 0.90–0.94) except for the 3-year-old children group (ICC, 0.84). Absolute reliability was excellent for the ASR, whereas the SSR yielded higher SEM and minimum detectable change percentage values. Regarding the criterion-related validity, statistically significant fair correlations were observed between both SR tests and the PSLR test. The ASR yielded higher levels of statistical significance as well as greater correlation coefficients than the SSR. This finding indicates that when it comes to assess flexibility through a low cost and easy-to-implement lineal test in preschoolers, it is advisable to use the SR with a box of reduced dimensions.