title: Effects of mate tea consumption on muscle strength and oxidative stress markers after eccentric exercise.
abstract: Dietary phytochemical supplementation may improve muscle recovery from exercise. In this study, we investigated the effect of mate tea (MT) consumption - a phenol-rich beverage - on muscle strength and oxidative stress biomarkers after eccentric exercise. In a randomised, cross-over design, twelve men were assigned to drink either MT or water (control; CON) for 11 d. On the 8th day, subjects performed three sets of twenty maximal eccentric elbow flexion exercises. Maximal isometric elbow flexion force was measured before and at 0, 24, 48 and 72 h after exercise. Blood samples were obtained before and at 24, 48 and 72 h after exercise and analysed for total phenolics, GSH, GSSG, GSH:GSSG ratio and lipid hydroperoxides (LOOH). After eccentric exercise, muscle strength was significantly reduced over time, regardless of treatments. However, MT improved the rate of strength recovery by 8·6 % on the 1st day after exercise (P<0·05). Plasma concentration of total phenolic compounds was higher in MT than in CON at all time points (P<0·05) but decreased significantly at 72 h after exercise in both trials (P<0·05). Blood levels of GSH were significantly decreased at 48 and 72 h after exercise in CON (P<0·05) but did not change over time in MT. No significant changes were observed for GSSG, GSH:GSSG ratio and LOOH levels. MT intake did not influence muscle strength at all time points assessed but hastened the strength recovery over 24 h after exercise. MT also favoured the concentration of blood antioxidant compounds.
authors.affiliation: 1Nutrition Post-Graduate Program,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Vilma Pereira
authors.initials: VP
authors.lastname: Panza
authors.affiliation: 2Biomechanics Laboratory,Department of Physical Education,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Fernando
authors.initials: F
authors.lastname: Diefenthaeler
authors.affiliation: 2Biomechanics Laboratory,Department of Physical Education,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Aline Cavalheiro
authors.initials: AC
authors.lastname: Tamborindeguy
authors.affiliation: 1Nutrition Post-Graduate Program,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Carolina de Quadros
authors.initials: Cde Q
authors.lastname: Camargo
authors.affiliation: 2Biomechanics Laboratory,Department of Physical Education,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Bruno Monteiro
authors.initials: BM
authors.lastname: de Moura
authors.affiliation: 3Laboratory of Investigation in Chronic Diseases,Department of Physiological Sciences,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Henver Simionato
authors.initials: HS
authors.lastname: Brunetta
authors.affiliation: 2Biomechanics Laboratory,Department of Physical Education,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Raphael Luiz
authors.initials: RL
authors.lastname: Sakugawa
authors.affiliation: 4Laboratory of Lipids, Antioxidants, and Atherosclerosis,Department of Clinical Analysis,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Marina Vieira
authors.initials: MV
authors.lastname: de Oliveira
authors.affiliation: 4Laboratory of Lipids, Antioxidants, and Atherosclerosis,Department of Clinical Analysis,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Emiliana de Oliveira
authors.initials: Ede O
authors.lastname: Puel
authors.affiliation: 1Nutrition Post-Graduate Program,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Everson Araújo
authors.initials: EA
authors.lastname: Nunes
authors.affiliation: 1Nutrition Post-Graduate Program,Federal University of Santa Catarina,Florianopolis,Santa Catarina,ZC 88040-970,Brazil.
authors.forename: Edson Luiz
authors.initials: EL
authors.lastname: da Silva
mesh_terms: D000328:Adult; D001628:Beverages; D015415:Biomarkers / Q000097:blood; D018592:Cross-Over Studies; D015444:Exercise / Q000502:physiology*; D005978:Glutathione / Q000097:blood; D006801:Humans; D030019:Ilex paraguariensis; D008054:Lipid Peroxides / Q000097:blood; D008297:Male; D053580:Muscle Strength / Q000187:drug effects*; D018384:Oxidative Stress / Q000187:drug effects*; D010636:Phenols / Q000097:blood; D010936:Plant Extracts / Q000008:administration & dosage*; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D015415:Biomarkers; D008054:Lipid Peroxides; D010636:Phenols; D010936:Plant Extracts; D005978:Glutathione
keywords: CON control; EEIMD eccentric exercise-induced muscle damage; Eccentric exercise; Ilex paraguariensis; Isometric strength; LOOH lipid hydroperoxides; MT mate tea; Mate tea; Muscle damage; Oxidative stress; PRE pre-exercise; Phenolic compounds