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This document is a correction notice for an article titled "In-season internal and external training load quantification of an elite European soccer team" published in the journal PLoS ONE. The correction addresses errors in the fifth and last paragraphs of the discussion section, as well as incomplete legends for figures 3 and 4. The corrections provide the accurate sentences and complete legends for the figures. The authors of the article are Rafael Oliveira, João P. Brito, Alexandre Martins, Bruno Mendes, Daniel A. Marinho, Ricardo Ferraz, and Mário C. Marques. [Extracted from the article]

Purpose: To verify the effects of using different grip widths in bench press performance in Paralympic powerlifting athletes. Methods: Twelve experienced Paralympic powerlifting male athletes (25.40 [3.30] y, 70.30 [12.15] kg) participated in the study. Maximal dynamic strength and maximal isometric strength (MIS) were determined. Then, mean propulsive velocity (MPV) using 25%, 50%, and 100% of maximal dynamic strength load and time to achieve 30%, 50%, and 100% of MIS were assessed with 4 different grip widths, specifically the biacromial distance (BAD: 42.83 [12.84] cm), 1.3 BAD (55.68 [16.70] cm), 1.5 BAD (63.20 [18.96] cm), and 81 cm. Electromyographic analysis was performed during MIS assessment in the pectoralis major sternal portion, anterior deltoid, triceps brachii long head, and pectoralis major clavicular portion. Results: Large differences were found between MPV performed with different grip widths using 25% of maximal dynamic strength load (P =.02, η p 2 =.26). The 1.5 BAD grip tended to show greater force generation and MPV. Moreover, the time needed to achieve 30%, 50%, and 100% of MIS differed between grip widths (P =.03, η p 2 =.24), with the lowest values obtained in the 1.5 BAD. Despite the nonstatistical differences that were found, grip widths caused moderate effects on muscle myoelectric activation, showing greater values for pectoralis major clavicular portion and pectoralis major sternal portion, for the 1.3 BAD and 1.5 BAD, respectively. The 1.5 BAD the grip width tended to show greater MPV values and faster contractile responses. Conclusions: These results highlighted the importance of choosing the specific grip width for improvement of performance in Paralympic powerlifting athletes, by increasing velocity of movement and force production in a shorter time, with greater activation of primary muscles. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this study was to determine the effects of an 8-week program of resistance training (RT) or suspension training (ST) on explosive strength in prepubescent boys. Methods: Fifty-seven boys aged 10–11 years were assigned to 2 training groups, RT or ST or a control group (no training program). Boys trained twice weekly for 8 weeks. Results: A significant interaction was reported with a large (P <.001, η p 2 =.463), medium (P <.001, η p 2 =.395), and small effect sized (P ≤.001, η p 2 =.218) in the 1-kg ball throw, 3-kg ball throw, and time-at-20-m test, respectively. There was no significant interaction in the countermovement vertical jump or the standing long jump. Changes from preintervention to postintervention for the 1-kg ball throw were 5.94% and 5.82% for the ST and RT, respectively, and 8.82% and 8.14% in the 3-kg ball throw for the ST and RT, respectively. The improvement in the 20-m sprint was 1.19% for the ST and 2.33% for the RT. Conclusion: Traditional RT and ST seem to be effective methods for improving explosive strength in prepubescent boys. ST could be considered as an alternative modality to optimize explosive strength training in school-based programs. [ABSTRACT FROM AUTHOR]

Wearable devices have been used to assess and monitor volleyball performance. Given the diversity of technologies used and the variables measured, this study aimed to synthesize and review the wearable technology used to assess and monitor physical performance in volleyball players. A comprehensive search of published articles was performed in the following databases: Web of Science, PubMed, and Scopus, up to 23 October 2022. Studies with volleyball players of any age that used a wearable device to assess or monitor physical performance (e.g., jump height) were included. Nine studies conducted with male or female volleyball players were included. The participants' age ranged between 16 and 32 years. Eight studies used Triaxial IMU, and one study used Vertec IMU. The performance analysis was based on vertical jump ability (n = 7) and overall volleyball performance (n = 2). Of the nine studies analyzed, 75% of the studies revealed blinding at the participant level and allocation concealment, and 95% reported a low risk of bias in the outcome assessment. This study shows that monitoring and assessing vertical jump ability through wearable devices is an increasing procedure in volleyball. Therefore, as jump height is a critical variable in athletic performance in volleyball, coaches and researchers might consider using wearable devices to assess and monitor physical performance changes in volleyball players. [ABSTRACT FROM AUTHOR]

Introduction. Physical activity (PA) brings cognitive, mental and physical improvements in adolescents, benefiting physical fitness (PF), cognitive results and mental health. Aim of Study. The present study aimed to analyze and characterize the level of PA, PF and attention in adolescents. Material and Methods. A descriptive cross-sectional study was performed. Forty-three adolescents aged 16 to 18 years old (16.77 ± 0.61 years), where 53.5% (n = 23) were boys participated in the study. An international questionnaire was used to accessed PA and PF levels. The CAD-S Assessment Scale revised version was used to evaluate the level of attention. Standard statistical methods were used to calculate means, standard deviations, and chi-square test. Results. The results show a moderate level of PA practice in adolescents (60.5%) and a high level of PA in boys, whom have also a good perception of their PF level 53.5% (p = 0.05). In the attention capacity, high levels in the adolescents (79.1%) were observed. Conclusions. The adolescents have a good perception of their PA and PF levels, showing positive perception on cognitive function. The practice of PA daily at school and extracurricular contexts seems to be essential to obtain high levels of PF and attention, contributing to better academic performance and life quality. [ABSTRACT FROM AUTHOR]

Background. The massive use and consumption of the digital age, combined with constant technological advances, has silently allowed the collection and excessive use of each person's personal data. When extrapolated by science and applied to sport, they can respond to the challenges of the actors/members, but the question arises: who owns the data collected from athletes? Objectives. The aim of this narrative review was to understand through the specialized literature the question of who owns the collected data. Methods. A narrative review was carried out through studies indexed in the following electronic databases: PubMed and Web Of Science. The following keywords were selected: Big Data, Sport, and Ethical, and a time cut was applied in the last 5 years. There was no specification regarding the language, and to broaden the discussion, articles and review articles focusing on Big data and Biometric data were also analyzed. Results. The results point to a massive use of technology, collection and overuse of personal data, raising legal and ethical problems regarding the ownership of the data. Conclusion. The evolution of technology, when combined with sports performance, creates legal and ethical problems leading athletes and actors to expose their data in an abusive way, creating the need to draw up individual agreements before starting any project. [ABSTRACT FROM AUTHOR]