Serum oxidant and antioxidant status during early and late recovery periods following an all-out 21-km run in trained adolescent runners

Abstract

It is well documented that intense exercise precipitates oxidative stress in adults. However, there is lack of related studies concerning oxidant and antioxidant status during early and late recovery periods in adolescent athletes, following endurance exercise in particular. This study investigated aspects of the serum oxidant and antioxidant status of 12 male adolescent (16.2 ± 0.6 years) trained runners during early and late recovery periods after an all-out 21-km run. Venous blood samples were taken immediately before, 2 and 4 h following (early recovery period), and 24 h following (late recovery period) the 21-km run. Samples were analyzed for serum concentrations of thiobarbituric acid-reactive substances (TBARS), uric acid (UA), reduced glutathione (GSH), and enzymatic activity of xanthine oxidase (XO), superoxide dismutase (SOD), and catalase (CAT). During the early recovery period, there were increases in the 4-h GSH (194.8 ± 10.4 vs. 211.8 ± 11.4 mg l(-1), P < 0.05), 2- and 4-h UA (307.8 ± 68.6 vs. 327.4 ± 63.8; 330.2 ± 65.1 μmol l(-1), P < 0.05), and 2-h CAT (2.05 ± 0.44 vs. 3.07 ± 0.51 U ml(-1), P < 0.05), and decreases in the 2-h XO (11.1 ± 1.5 vs. 10.3 ± 1.2 U l(-1), P < 0.05) compared to the corresponding pre-exercise level, respectively. No change was observed in SOD (P > 0.05). At the late recovery period, there was an increase in CAT (2.80 ± 0.49 U ml(-1), P < 0.05) and TBARS (2.99 ± 0.83 vs. 4.40 ± 1.38 nmol ml(-1), P < 0.05). These data indicate that although the antioxidant capacity of adolescent runners is augmented during the early recovery period following the 21-km run, they were not completely protected from oxidative stress during the later recovery period.

Effects of acute twelve minute run test on oxidative stress and antioxidant enzyme activities

“…After a 21 km run, oxidant and antioxidant status in early and later resting periods of trained adolescent runners were investigated and CAT value was found to be increased at 2 and 24 h after the run (Tian et al 2010). Higher serum MDA and lower CAT activities were found in elite cyclers compared with sedentary subjects after exhaustion exercise (Lekhi et al, 2007).…”

Alterations in Redox Homeostasis in the Elite Endurance Athlete

“…If there was any doubt over whether the athletes were elite, the authors of the articles were emailed for further clarification; in total 14 authors were emailed. The methodology of the 59 elite athlete articles were then reviewed in detail (step 5), and 33 articles were excluded from the final review because of one or more of the following: the authors did not state the training status of the subjects, or respond to requests for subject details (n = 4) [38,46,73,74]; the subjects were masters/former athletes (n = 3) [75][76][77], amateur or college level athletes (n = 3) [ [78][79][80], athletes, but not elite status (n = 4) [42,48,81,82] or navy recruits (n = 1) [83]; participants were elite, but under 18 years of age (n = 2) [84,85]; only one sampling point was included, compared with healthy control data (n = 1) [86]; less than half of the study population were elite (n = 2) [87,88]; there were insufficient measures of redox balance [89,90] (n = 2); the training volume was not indicative of elite cyclists at 90 km per week (n = 1) [91]; the studies were RCTs involving antioxidant supplementation in elite athletes (n = 10) [92][93][94][95][96][97][98][99][100][101]. In addition, the methodological qualities of the articles were checked using methodological quality assessment criteria for the observational articles to be included in the final analysis (step 6).…”

Serum Oxidant and Antioxidant Status Following an All-Out 21-km Run in Adolescent Runners Undergoing Professional Training—A One-Year Prospective Trial

“…Moreover, adolescents rely more on aerobic metabolism than adults when subjected to identical bulks of physical exercise [10,11]. Although well-maintained resting blood redox balance has been described in adolescent athletes participating in professional endurance training [12], impaired oxidant-antioxidant balance has been observed after a single session of exhaustive endurance training in athletes [13]. Previous findings pointed out that the antioxidant capacity of individuals might have a genetic basis [14].…”