Martínez-Noguera Francisco Javier, Alcaraz Pedro E, Ortolano-Ríos Raquel, Dufour Stéphane P, Marín-Pagán Cristian
Research Center for High Performance Sport, Campus de los Jerónimos, Catholic University of Murcia, 30107 Murcia, Spain.
Faculty of Medicine, Translational Medicine Federation (FMTS) UR 3072, University of Strasbourg, 67000 Strasbourg, France.
Antioxidants (Basel). 2021 Feb 12;10(2):282. doi: 10.3390/antiox10020282.
Currently, no studies have examined the differences in endogenous antioxidant enzymes in professional and amateur cyclists and how these can influence sports performance. The aim of this study was to identify differences in endogenous antioxidants enzymes and hemogram between competitive levels of cycling and to see if differences found in these parameters could explain differences in performance. A comparative trial was carried out with 11 professional (PRO) and 15 amateur (AMA) cyclists. All cyclists performed an endogenous antioxidants analysis in the fasted state (visit 1) and an incremental test until exhaustion (visit 2). Higher values in catalase (CAT), oxidized glutathione (GSSG) and GSSG/GSH ratio and lower values in superoxide dismutase (SOD) were found in PRO compared to AMA ( < 0.05). Furthermore, an inverse correlation was found between power produced at ventilation thresholds 1 and 2 and GSSG/GSH (r = -0.657 and r = -0.635; < 0.05, respectively) in PRO. Therefore, there is no well-defined endogenous antioxidant enzyme profile between the two competitive levels of cyclists. However, there was a relationship between GSSG/GSH ratio levels and moderate and submaximal exercise performance in the PRO cohort.
目前，尚无研究探讨职业自行车运动员和业余自行车运动员体内内源性抗氧化酶的差异，以及这些差异如何影响运动表现。本研究的目的是确定不同骑行竞技水平的运动员在内源性抗氧化酶和血常规方面的差异，并观察这些参数的差异是否能够解释运动表现的差异。对11名职业（PRO）自行车运动员和15名业余（AMA）自行车运动员进行了一项对比试验。所有自行车运动员在空腹状态下进行了一次内源性抗氧化剂分析（第1次访视），并进行了一次递增负荷试验直至力竭（第2次访视）。与AMA相比，PRO组的过氧化氢酶（CAT）、氧化型谷胱甘肽（GSSG）和GSSG/GSH比值较高，超氧化物歧化酶（SOD）较低（<0.05）。此外，在PRO组中，第1和第2通气阈值时产生的功率与GSSG/GSH之间呈负相关（r=-0.657和r=-0.635；分别<0.05）。因此，在两个竞技水平的自行车运动员之间没有明确的内源性抗氧化酶谱。然而，在PRO队列中，GSSG/GSH比值水平与中等强度和次最大运动表现之间存在关联。
