title: Acute and delayed responses of C-reactive protein, malondialdehyde and antioxidant markers after resistance training session in elite weightlifters: Effect of time of day.
abstract: The aim of this study was to investigate the effect of an Olympic-Weightlifting-session followed by 48-h recovery period on the oxidative and antioxidant parameters' diurnal variation. Nine weightlifters (21 ± 0.5 years) performed, in randomized order, three Olympic-Weightlifting-sessions at 08 h:00, 14 h:00 and 18 h:00. Blood samples were collected: at rest and 3 min and 48 h after each session. C-reactive protein (CRP), rate of lipid peroxidation and antioxidant activities were assessed. At rest, analysis of variance showed a significant time of day (TOD) effect (p < 0.05) for uric acid, catalase and glutathione peroxidase with higher values at 14 h:00 and 18 h:00 compared with 08 h:00. However, no significant TOD effect for malondialdehyde, total bilirubin and CRP was observed. Given the profound changes (p < 0.001) in the post-training session values, these diurnal variations have been altered immediately and even 48 h after the training sessions. Despite the significant decreases in the post-training values after the 48-h recovery period (p < 0.05), levels of lipid peroxidation and enzymatic defense remained elevated (p < 0.05) 48 h after the morning training session. However, after the afternoon and evening sessions, the same period was sufficient to return values to the baseline levels. In conclusion, the morning session seems to generate the most important acute and delayed lipid peroxidation responses. Therefore, weightlifting coaches should avoid scheduling their training sessions in the morning-hours.
authors.affiliation: a Research Unit (EM2S), High Institute of Sport and Physical Education, University of Sfax , Sfax , Tunisia .|b Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg , Germany .
authors.forename: Achraf
authors.initials: A
authors.lastname: Ammar
authors.affiliation: c High Institute of Sport and Physical Education of Sfax, University of Sfax , Sfax , Tunisia .|d Research Laboratory ''Sports Performance Optimization'' National Centre of Medicine and Science in Sports (CNMSS) , Tunis , Tunisia .
authors.forename: Hamdi
authors.initials: H
authors.lastname: Chtourou
authors.affiliation: e CeRSM (EA 2931), UFR STAPS, Université Paris Ouest Nanterre La Défense , Nanterre , France .
authors.forename: Omar
authors.initials: O
authors.lastname: Hammouda
authors.affiliation: f Laboratory of Pharmacology , Faculty of Medicine, University of Sfax , Sfax , Tunisia .
authors.forename: Khaled
authors.initials: K
authors.lastname: Trabelsi
authors.affiliation: a Research Unit (EM2S), High Institute of Sport and Physical Education, University of Sfax , Sfax , Tunisia .
authors.forename: Jihen
authors.initials: J
authors.lastname: Chiboub
authors.affiliation: g Laboratory of Biochemistry , CHU Habib Bourguiba, University of Sfax , Sfax , Tunisia .
authors.forename: Mouna
authors.initials: M
authors.lastname: Turki
authors.affiliation: b Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg , Germany .|h Faculty of Physical Education , Assiut University , Assiut , Egypt , and.
authors.forename: Osama
authors.initials: O
authors.lastname: AbdelKarim
authors.affiliation: i Laboratory of Microbial Biotechnology and Enzyme Engineering , Centre of Biotechnology of Sfax (CBS), University of Sfax , Sfax , Tunisia.
authors.forename: Kais
authors.initials: K
authors.lastname: El Abed
authors.affiliation: i Laboratory of Microbial Biotechnology and Enzyme Engineering , Centre of Biotechnology of Sfax (CBS), University of Sfax , Sfax , Tunisia.
authors.forename: Mamdouh
authors.initials: M
authors.lastname: Ben Ali
authors.affiliation: b Institute of Sport Science, Otto-von-Guericke-University Magdeburg , Magdeburg , Germany .
authors.forename: Anita
authors.initials: A
authors.lastname: Hoekelmann
authors.affiliation: d Research Laboratory ''Sports Performance Optimization'' National Centre of Medicine and Science in Sports (CNMSS) , Tunis , Tunisia .
authors.forename: Nizar
authors.initials: N
authors.lastname: Souissi
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D054874:Athletic Performance; D015415:Biomarkers / Q000097:blood; D002097:C-Reactive Protein / Q000378:metabolism*; D002940:Circadian Rhythm; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008315:Malondialdehyde / Q000097:blood*; D018384:Oxidative Stress; D011897:Random Allocation; D055070:Resistance Training / Q000009:adverse effects; D013997:Time Factors; D014891:Weight Lifting; D055815:Young Adult
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D008315:Malondialdehyde; D002097:C-Reactive Protein
keywords: Diurnal variation; inflammation; redox status; weightlifting