Gustavo Ponce-Gonzalez, JesusCorral-Perez, JuanSaez de Villarreal, EduardoVicente Gutierrez-Manzanedo, JoseDe Castro-Maqueda, GuillermoCasals, Cristina2025-01-072025-01-072021-10-011640-5544https://hdl.handle.net/10668/25232The aim of this study was to assess antioxidant markers before and after a mid-season of professional soccer players from the 3rd Spanish Division, and to correlate antioxidant markers with competitive performance. Sixty-five male players (age = 25.3 +/- 4.2 yr, body mass = 73.2 +/- 6.7 kg, body height = 177.8 +/- 5.7 cm) from three soccer clubs from Cadiz (Spain) participated in the study. Body composition, maximal aerobic capacity (VO2max), and baseline antioxidant blood markers (Total Antioxidant Status (TAS) and Reduced glutathione/Oxidized glutathione ratio) were assessed in the first week of the championship season (pre-test) and after 18 weeks in the mid-season (post-test). Soccer performance was registered according to the official classification ranking at both the mid-season and at the end of the season; ranking positions for Team A were 2nd and 1st, for Team B were 5th and 5th, while for Team C were 12th and 14th, respectively. Regression analyses showed that TAS and VO2max were able to independently predict (penAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/total antioxidant capacityglutathioneoxidative stresselite athletesteam sportsOxidative stress biomarkersMuscle damageOxygen-uptakeTime-courseMatchEnduranceExerciseResponsesRecoveryFatigueresearch article34868422open access10.2478/hukin-2021-00891899-7562https://www.sciendo.com/pdf/10.2478/hukin-2021-0089721170900012