Development of a Derivatization Method for Investigating Testosterone and Dehydroepiandrosterone Using Tandem Mass Spectrometry in Saliva Samples from Young Professional Soccer Players Pre- and Post-Training by Mansour A. Alzahrani, Ghareeb O. Alshuwaier, Khalid S. Aljaloud, Colin Gibson, Abedawn Khalaf, Aliyah S. Alhawiti, David G. Watson

“…A liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used in a positive mode with multiple reaction monitoring (MRM) for the quantification of testosterone (T) and its precursor, dehydroepiandrosterone (DHEA), in saliva samples collected from twenty young Saudi professional soccer players. The analytes were separated on an ACE Ultracore 2.5 Superphenylhexyl column (150 × 3.0 mm id). …”
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Modifying the pre-pitch entry practices of professional soccer substitutes may contribute towards improved movement-related performance indicators on match-day: A case study. by Samuel P Hills, Stephen Barrett, Matthew Hobbs, Martin J Barwood, Jon N Radcliffe, Carlton B Cooke, Mark Russell

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REPEATED SPRINT ABILITY IN PROFESSIONAL SOCCER vs. PROFESSIONAL FUTSAL PLAYERS [Capacidad de realizar esprints repetidos en jugadores profesionales de fútbol vs.... by V. Cuadrado-Peñafiel, J. Párraga-Montilla, M.A. Ortega-Becerra, P. Jiménez-Reyes

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Small-sided-games with coaches’ verbal encouragement have a positive effect on aerobic performance, mood state, satisfaction and subjective effort in male semi-professional soccer players by Zouheir Romdhani, Halil Ibrahim Ceylan, Raouf Hammami, Faten Sahli, Wissem Dhahbi, Nizar Souissi, Makram Zghibi, Rafael Oliveira, Ryland Morgans, Pantelis T Nikolaidis

“…The present study highlights the positive effects of integrating SSGs with coaches VE to improve aerobic performance and mental well-being of semi-professional soccer players. Nevertheless, notably the SSA did not exhibit a statistically significant difference. …”
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Elevated IL-1β and Comparable IL-1 Receptor Antagonist Levels Are Characteristic Features of L-PRP in Female College Athletes Compared to Male Professional Soccer Players by Tomoharu Mochizuki, Takashi Ushiki, Katsuya Suzuki, Misato Sato, Hajime Ishiguro, Tatsuya Suwabe, Satoshi Watanabe, Mutsuaki Edama, Go Omori, Noriaki Yamamoto, Tomoyuki Kawase

“…Leukocyte-rich PRP (L-PRP) was manually prepared from blood samples collected from male professional soccer players (mPSPs) (n = 25) and female college athletes (fCAs) (n = 36). …”
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REPEATED SPRINT ABILITY IN PROFESSIONAL SOCCER vs. PROFESSIONAL FUTSAL PLAYERS [Capacidad de realizar esprints repetidos en jugadores profesionales de fútbol vs.... by V. Cuadrado-Peñafiel, J. Párraga-Montilla, M.A. Ortega-Becerra, P. Jiménez-Reyes

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Professional soccer practitioners' perceptions of using performance analysis technology to monitor technical and tactical player characteristics within an academy environment: A category 1 club case study. by Tia-Kate Davidson, Steve Barrett, John Toner, Chris Towlson

“…This study aimed to identify professional soccer practitioners' perceptions of the application of performance analysis technology within a single academy club. …”
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The Influence of Time Winning and Time Losing on Position-Specific Match Physical Demands in the Top One Spanish Soccer League by José C. Ponce-Bordón, Jesús Díaz-García, Miguel A. López-Gajardo, David Lobo-Triviño, Roberto López del Campo, Ricardo Resta, Tomás García-Calvo

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Observational Studies in Male Elite Football: A Systematic Mixed Study Review by Maria Preciado, M. Teresa Anguera, Mauricio Olarte, Daniel Lapresa

Subjects: “…professional soccer…”
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Corrigendum: Observational Studies in Male Elite Football: A Systematic Mixed Study Review by Maria Preciado, M. Teresa Anguera, Mauricio Olarte, Daniel Lapresa

Subjects: “…professional soccer…”
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Ultrasound-Guided Percutaneous Needle Electrolysis and Rehab and Reconditioning Program for Rectus Femoris Muscle Injuries: A Cohort Study with Professional Soccer Players and a 20-Week Follow-Up by Fermín Valera-Garrido, Sergio Jiménez-Rubio, Francisco Minaya-Muñoz, José Luis Estévez-Rodríguez, Archit Navandar

“…The purpose of this study was to describe the safety and feasibility of a combination of percutaneous needle electrolysis (PNE) and a specific rehab and reconditioning program (RRP) following an injury to the rectus femoris in professional soccer players. Thirteen professional soccer players received PNE treatment 48 h after a grade II rectus femoris muscle injury, followed by a the RRP 24 h later. …”
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Analysis of the External and Internal Load in 5vs5 Large Sided Games: Differences Between Different Sized Fields by Giacomo Cofano, Francesca D’Elia, Andrea Piccinno, Italo Sannicandro

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Effects of COVID-19 Lockdown on Physical Performance, Sleep Quality, and Health-Related Quality of Life in Professional Youth Soccer Players by Jil Keemss, Johanna Sieland, Florian Pfab, Florian Pfab, Florian Pfab, Winfried Banzer

Subjects: “…professional soccer players…”
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The Effects of Pre-Season and Relationships with Physical, Physiological, Body Composition, and Load Markers: A Case Study Comparing Starters versus Non-Starters from an Elite Female Professional Soccer Team by Rafael Oliveira, João Paulo Brito, Renato Fernandes, Ryland Morgans, Susana Alves, Fernando J. Santos, Paula Pinto, Mário C. Espada

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Differential Health Effects on Inflammatory, Immunological and Stress Parameters in Professional Soccer Players and Sedentary Individuals after Consuming a Synbiotic.... by Carmen Daniela Quero, Pedro Manonelles, Marta Fernández, Oriol Abellán-Aynés, Daniel López-Plaza, Luis Andreu-Caravaca, María Dolores Hinchado, Isabel Gálvez, Eduardo Ortega

“…The participants were professional soccer players in the Second Division B of the Spanish League and sedentary students of the same sex and age range. …”
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Uma análise da vantagem de jogar em casa nas duas principais divisões do futebol profissional brasileiro Home advantage in the two main divisions of the Brazilian professional soccer by Lucas Gomes de Almeida, Márcio Lopes de Oliveira, Cristiano Diniz da Silva

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A Pilot Study on the Prediction of Non-Contact Muscle Injuries Based on <i>ACTN3</i> R577X and <i>ACE</i> I/D Polymorphisms in Professional Soccer Athletes by Kathleen Y. de Almeida, Tiago Cetolin, Andrea Rita Marrero, Aderbal Silva Aguiar Junior, Pedro Mohr, Naoki Kikuchi

“…The aim of this study was to analyze whether <i>ACTN3</i> R577X and <i>ACE</i> I/D polymorphisms are predictors of the incidence and severity of muscle injury in professional soccer athletes from Brazil, individually and in association. …”
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Match Movement Profiles Differences in Spanish Soccer Competitive Leagues According to Opposition’s Team Ranking: A Comparison Study by José C. Ponce-Bordón, Hadi Nobari, David Lobo-Triviño, Tomás García-Calvo, Jesús Vicente-Giménez, Roberto López del Campo, Ricardo Resta, Javier Fernández-Navarro

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Acute effects of beetroot juice and caffeine co-ingestion during a team-sport-specific intermittent exercise test in semi-professional soccer players: a randomized, double-blind, placebo-controlled study by Erfan Berjisian, Kerry McGawley, Bryan Saunders, Raúl Domínguez, Majid S. Koozehchian, Caio Victor Coutinho de Oliveira, Ramin Rafiei, Hossein Miraftabi, Amir Sarshin, Alireza Naderi

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Monitorización de biomarcadores sanguíneos en jugadores profesionales de fútbol durante la fase preparatoria y competitiva. [Monitoring biochemical markers in professional soccer players during the season and preseason preparation phase]. by Javier Vilamitjana, Julio César Vaccari, Mariano Toedtli, Diego Navone, Jose Maria Rodriguez-Buteler, Pablo Emilio Verde, Julio Calleja-González

“…Abstract The aim of this study is to analyze changes of stress-related biochemical markers in Argentine professional soccer players (n = 22) at 3 timepoints during the soccer season: beginning of preseason (E1), beginning of season (E2), and after 6 weeks of competitive season (E3). …”
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