title: Serum oxidant and antioxidant status in adolescents undergoing professional endurance sports training.
abstract: This study evaluated the impact of professional training on serum oxidant and antioxidant status in adolescent endurance athletes and compared it with that of untrained individuals. Firstly, serum thiobarbituric-acid-reactive substances (TBARSs), xanthine oxidase (XO), catalase (CAT), reduced glutathione (GSH), superoxide dismutase (SOD), and total antioxidant capacity (T-AOC) were measured in 67 male runners, cyclists, and untrained adolescents. Seven-day dietary intakes were also assessed. Secondly, for age- and Tanner-stage-matched comparison, 36 out of the 67 subjects (12 for each group) were then selected and investigated. In cyclists, XO, GSH, and CAT were higher as compared with runners and controls. The CAT in runners, but not GSH and XO, was also higher than in controls. TBARS, T-AOC, and SOD did not differ among the study populations. Regarding the inter-individual relationships among serum redox statuses and dietary nutrient intakes, significant correlations were noted in CAT versus carbohydrates, protein, magnesium, and manganese; GSH versus carbohydrates, protein, fat, selenium, zinc, iron, and magnesium; XO versus cholesterol; CAT versus GSH. These findings suggest that the resting blood redox balance in the professional adolescent athletes was well maintained partly by the increase of individual antioxidant in adaptation to chronic exercise.
authors.affiliation: Department of Physical Education, Dr. Stephen Hui Research Centre for Physical Recreation and Wellness, Hong Kong Baptist University, Hong Kong.
authors.forename: Tom K
authors.initials: TK
authors.lastname: Tong
authors.forename: Hua
authors.initials: H
authors.lastname: Lin
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Lippi
authors.forename: Jinlei
authors.initials: J
authors.lastname: Nie
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
mesh_terms: D000293:Adolescent; D000975:Antioxidants / Q000378:metabolism*; D056352:Athletes; D002374:Catalase / Q000097:blood; D005247:Feeding Behavior; D005978:Glutathione / Q000097:blood; D006801:Humans; D008297:Male; D016877:Oxidants / Q000097:blood*; D010807:Physical Endurance / Q000502:physiology*; D055070:Resistance Training; D013177:Sports / Q000502:physiology*; D013482:Superoxide Dismutase / Q000097:blood; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D014969:Xanthine Oxidase / Q000097:blood
chemical_list: D000975:Antioxidants; D016877:Oxidants; D017392:Thiobarbituric Acid Reactive Substances; D002374:Catalase; D013482:Superoxide Dismutase; D014969:Xanthine Oxidase; D005978:Glutathione