title: Effect of exercise training on respiration and reactive oxygen species metabolism in eel red muscle.
abstract: This paper deals with the effects of exercise training on oxygen consumption (MO(2)) and ROS metabolism in the red muscle of trained and untrained female silver eels. Their critical swimming speed (U(crit)) was determined before and after a 4-day training (10h of swimming at 70% of U(crit) and 14 h at 50%, every day). The U(crit) of trained eels increased significantly (by about 7%). The in vitro MO(2) and ROS production by the red fibres were higher (not significant) in trained than in untrained eels, but the ROS production/MO(2) ratio was alike in both groups. The antioxidant-enzyme activities and lipoperoxidation index in trained eels were both lower than those of the untrained ones. These biochemical changes related to the increase in U(crit) suggest that such a training session could maintained or even increased aerobic power of the red muscle without deleterious impact by ROS. These regulations could play a role in the eel's swimming performance efficiency.
authors.affiliation: Unité ORPHY, EA 4324, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, Brest, France.
authors.forename: Hélène
authors.initials: H
authors.lastname: Mortelette
authors.forename: Aline
authors.initials: A
authors.lastname: Amérand
authors.forename: Philippe
authors.initials: P
authors.lastname: Sébert
authors.forename: Marc
authors.initials: M
authors.lastname: Belhomme
authors.forename: Patrick
authors.initials: P
authors.lastname: Calvès
authors.forename: Christine
authors.initials: C
authors.lastname: Moisan
mesh_terms: D000818:Animals; D002374:Catalase / Q000378:metabolism; D002950:Citrate (si)-Synthase / Q000378:metabolism; D004524:Eels / Q000502:physiology*; D005260:Female; D005979:Glutathione Peroxidase / Q000378:metabolism; D015227:Lipid Peroxidation / Q000502:physiology; D008315:Malondialdehyde / Q000378:metabolism; D009124:Muscle Proteins / Q000378:metabolism; D018482:Muscle, Skeletal / Q000378:metabolism* / Q000502:physiology*; D010101:Oxygen Consumption / Q000502:physiology; D010805:Physical Conditioning, Animal / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology; D017382:Reactive Oxygen Species / Q000378:metabolism*; D015656:Respiratory Mechanics / Q000502:physiology*; D013482:Superoxide Dismutase / Q000378:metabolism; D013550:Swimming / Q000502:physiology
chemical_list: D009124:Muscle Proteins; D017382:Reactive Oxygen Species; D008315:Malondialdehyde; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D002950:Citrate (si)-Synthase