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Comment on: “Creatine Monohydrate Supplementation, but not Creatyl-L-Leucine Increased Muscle Creatine Content in Healthy Young Adults: A Double-Blind Placebo-Controlled Trial”

Guillermo Escalante and Dean St. Mart

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Reply to G. Escalante and D. St. Mart

Andrew T. Askow and Nicholas A. Burd

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Erratum. Effects of Low- Versus High-Velocity-Loss Thresholds With Similar Training Volume on Maximal Strength and Hypertrophy in Highly Trained Individuals

International Journal of Sports Physiology and Performance

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Physical Activity Para Report Card for Children and Adolescents With Disabilities in Lithuania

Jurate Pozeriene, Arūnas Emeljanovas, Vida Ostaseviciene, Kestutis Skucas, Kristina Bradauskiene, Renatas Mizeras, Ausrine Packeviciute, Kristina Venckuniene, Vaida Pokvytyte, Diana Reklaitiene, and Kwok Ng

Despite the recognized benefits of physical activity (PA) for children and adolescents with disabilities (CAWD), collective information on this is lacking in Lithuania. The purpose of this study was to investigate the current “state of the nation” PA levels of CAWD, based on the 10 indicators from the Active Healthy Kids Global Alliance Global Matrix 4.0 methodology. Scientific articles, practical reports, and published theses related to the 10 indicators from the Global Matrix 4.0 on CAWD age 6–19 years were reviewed, and data were converted to grades from A to F. (A) Strengths, Weaknesses, Opportunities, and Threats analysis was carried out to interpret the grades by four experts. Data on organized sport participation (F), school (D), community & environment (D), and government (C) were available. Data on other indicators are largely missing yet are needed for policymakers and researchers to be aware of the current state of PA among CAWD.

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Results From Spain’s 2022 Para Report Cards on Physical Activity of Children and Adolescents With Disabilities

José Francisco López-Gil, Susana Aznar, Blanca Roman-Viñas, Javier Brazo-Sayavera, Rocío Izquierdo-Gómez, Sabina Barrios-Fernández, Olga Rodríguez Ferrán, and Salome Aubert

This report aims to provide a better understanding of physical activity (PA) and related factors among Spanish children and adolescents living with disabilities. The 10 indicators used for the Global Matrix on Para Report Cards of children and adolescents living with disabilities were evaluated based on the best available data in Spain. An analysis of strengths, weaknesses, opportunities, and threats based on data provision was drafted by three experts and critically reviewed by the authorship team to provide a national perspective for each evaluated indicator. Government was the indicator with the highest grade (C+), followed by Sedentary Behaviors (C−), School (D), Overall PA (D−), and Community & Environment (F). The remaining indicators received an incomplete grade. There were low levels of PA in Spanish children and adolescents living with disabilities. Yet, opportunities to improve the current surveillance of PA among this population exist.

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“WOT” Do We Know and Do About Physical Activity of Children and Adolescents With Disabilities? A SWOT-Oriented Synthesis of Para Report Cards

Yeshayahu Hutzler, Sharon Barak, Salomé Aubert, Kelly Arbour-Nicitopoulos, Riki Tesler, Cindy Sit, Diego Augusto Santos Silva, Piritta Asunta, Jurate Pozeriene, José Francisco López-Gil, and Kwok Ng

The purpose was to synthesize information gathered from the interpretation and conclusion sections of the Global Matrix of Para Report Cards on the physical activity of children and adolescents with disabilities. The synthesis was based on the strengths, weaknesses, opportunities, and threats framework. The procedure consisted of three stages: (a) the application of the International Classification of Functioning, Disability and Health as the theoretical framework; (b) identifying and aligning Global Matrix indicators and benchmarks with the International Classification of Functioning, Disability and Health components through a Delphi approach; and (c) using content analysis to identify themes from specific report cards. Outcomes reveal that further attention toward including children and adolescents with disabilities in fitness assessments is needed as well as adapted assessment methods. Program availability, equipment and facilities, and professional training emerged as strengths but need further development to overcome weaknesses. Paralympic inspiration was an opportunity, whereas extreme weather conditions presented potential threats to physical activity participation among children and adolescents with disabilities.

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Erratum. A Novel Approach to Determining the Alactic Time Span in Connection with Assessment of the Maximal Rate of Lactate Accumulation in Elite Track Cyclists

International Journal of Sports Physiology and Performance

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Erratum. Health Outcomes of Physical Activity Interventions in Adults With Down Syndrome: A Systematic Review

Adapted Physical Activity Quarterly

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The Relevance of Muscle Fiber Type to Physical Characteristics and Performance in Team-Sport Athletes

Henry J. Hopwood, Phillip M. Bellinger, Heidi R. Compton, Matthew N. Bourne, and Clare Minahan

Purpose: The aim of this systematic review was to (1) determine the muscle fiber-type composition (or muscle fiber typology [MFT]) of team-sport athletes and (2) examine associations between MFT and the physical characteristics and performance tasks in team-sport athletes. Methods: Searches were conducted across numerous databases—PubMed, SPORTDiscus, MEDLINE, and Google Scholar—using consistent search terms. Studies were included if they examined the MFT of team-sport athletes. Included studies underwent critical appraisal using the McMasters University critical appraisal tool for quantitative research. Results: A total of 10 studies were included in the present review, wherein the MFT of athletes was measured from 5 different team sports (soccer, rugby union, rugby league, handball, and volleyball). There was large variability in the MFT of team-sport athletes both within (up to 27.5%) and between sports (24.0% relative difference). Male football players with a higher proportion of type II fibers had faster 10- and 30-m sprint times, achieved a greater total distance sprinting (distance at >6.67 m·s−1), and a greater peak 1-minute sprint distance. Conclusions: MFT varies considerably between athletes both within and between different team sports. The results from some studies suggest that variation in MFT is associated with high-intensity running performance in a football match, as well as 10- and 30-m sprint times. Further experimental studies should focus on how determination of the MFT of team-sport athletes could be utilized to influence talent identification, team selection, and the individualization of training.

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Training Quality—An Unexplored Domain in Sport Science

Thomas Haugen, Espen Tønnessen, Silvana Bucher Sandbakk, and Øyvind Sandbakk