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Results 501 - 550 of 1369
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Goldfarb A H - - 2008
Seven weight-trained males performed both light resistance with partial occlusion (LRO: 30% 1 RM) and moderate resistance (MR: 70% 1 RM) to failure to ascertain whether blood protein carbonyls (PC) and glutathione status was altered compared to partial occlusion (PO) in a counterbalanced fashion. PO was identical in duration to ...
Foo L H - - 2009
Little is known about the prevalence of actual vitamin D deficiency in healthy school-aged adolescents, particularly in China. The aim of this study was to examine the prevalence of hypovitaminosis D and to identify whether there was any association between vitamin D status, body composition and physical exercise in 323 ...
Jou Mei-Jie - - 2008
Astrocytes, in addition to passively supporting neurons, have recently been shown to be actively involved in synaptic transmission and neurovascular coupling in the central nervous system (CNS). This review summarizes briefly our previous observations using fluorescent probes coupled with laser scanning digital imaging microscopy to visualize spatio-temporal alteration of mitochondrial ...
Ewen John G - - 2008
Carotenoids are integument pigments that often reflect foraging efficiency, disease resistance and body condition. In contrast to the widespread attention this relationship has received in adult birds, the condition dependence of nestling colouration remains an understudied component of animal communication. Here we assess the condition dependence of carotenoid pigmentation in ...
Margaritis I - - 2008
Physical training is known to induce a biochemical adaptive response which might require an increase in the ingestion and/or the absorption of micronutrients. A question that is still being raised is whether acute or chronic exercise modifies antioxidant requirements. First, the present review brings to light the most crucial studies ...
Nakhostin-Roohi B - - 2008
AIM: Hypothetically, supplementation with the antioxidant vitamins C could alleviate exercise-induced lipid peroxidation. The purpose of this study was to evaluate the effect of vitamin C supplementation on exercise-induced lipid peroxidation, muscle damage and inflammation. METHODS: Sixteen healthy untrained male volunteers participated in a 30-min exercise at 75% Vo2max. Subjects ...
Skarpanska-Stejnborn Anna - - 2008
High-intensity physical exercise decreases intracellular antioxidant potential. An enhanced antioxidant defense system is desirable in people subjected to exhaustive exercise. The aim of this study was to investigate the influence of supplementation with artichoke-leaf extract on parameters describing balance between oxidants and antioxidants in competitive rowers. This double-blinded study was ...
Chae Chang-Hun - - 2008
We investigated the effect of DL-alpha-lipoic acid (LA) supplementation and regular aerobic exercise on the concentrations of malondialdehyde (MDA) and vitamin E, the activities of superoxide dismutase (SOD) and glutathione peroxidase (GPx), and the levels of glutathione (GSH) in rat skeletal muscles (soleus and red gastrocnemius). For 8 weeks, rats ...
Motta S - - 2009
The aim of this placebo-controlled study was to investigate the effects of oral vitamin E supplementation for 10 weeks on exercise-induced oxidative damage in untrained dogs. Eight dogs were randomly assigned to a supplementation (n=4) or control (n=4) group and underwent two isolated submaximal exercise sessions, 10 weeks apart. Blood ...
Hibbert Osita - - 2008
Hamstring strains are the most common soft-tissue injury observed in recreational and athletic activities, yet no consensus exists regarding appropriate primary and secondary strategies to prevent these strains. Eccentric exercise has been reported to reduce the incidence of ham-string strains but its role has not been clearly defined. The objective ...
Avilez Ive Marchioni - - 2008
Parameters of the antioxidant defense systems of Brycon amazonicus (matrinxã--a neotropical fish) exposed to phenol for 96 h plus the recovery over 1 and 2 weeks were studied in erythrocytes and liver. Hematocrit increase was observed during phenol exposure and recovery for 1 week. Total superoxide dismutases (SOD), glutathione peroxidase ...
Beheshtian Azadeh - - 2008
OBJECTIVES: The role of endogenous cannabinoids in ischemia/reperfusion induced germ cell apoptosis in rats was investigated. METHODS: Baseline group was for basal normal values. The Sham operated group served as a control group. The torsion/detorsion (T/D) group underwent torsion (1 h) and detorsion; AN1, AN2, and AN3 groups received anandamide ...
Rakpongsiri Kedsara - - 2008
The combined effect of creatine (Cr) or estrogen (E(2)) with exercise training on cardiac reserve function and antioxidant reservation against oxidative stress were investigated in ovariectomized female Golden Syrian hamsters. One hundred animals were divided into nonexercise and exercise-trained groups, in which each group was separated into the control and ...
Kakarla Pushpalatha - - 2008
Glutathione plays a central role in the maintenance of cellular antioxidant defense. The alterations in the glutathione and associated recyclic enzymes caused by both exercise training and ethanol are well documented; however, their interactive effects with age are not well understood. Therefore, the influence of ageing and the interactive effects ...
Moien-Afshari F - - 2008
AIMS/HYPOTHESIS: Exercise ameliorates oxidative stress-mediated diabetic vascular endothelial dysfunction through poorly defined mechanisms. We hypothesised that, in addition to improving metabolic parameters, upregulation of antioxidants such as superoxide dismutase (SOD) mediates exercise-induced reductions of oxidative stress and increased nitric oxide (NO) bioavailability, and also restores vasodilatation. METHODS: Type 2 diabetic ...
Olsson Mats - - 2008
In the ageing individual, the production of reactive oxygen species (ROS) accelerates with cell senescence. Depending on the heritability of the underlying processes that determine net ROS levels, this may influence ageing per se and its evolutionary direction and rate of change. In order to understand the inheritance and evolution ...
Souza-Rabbo Maristela P - - 2008
1. In the present study, we investigated the effects of exercise training on cardiac hypertrophy and oxidative stress in a monocrotaline (MCT)-induced cor pulmonale model. Male Wistar rats were assigned to one of three groups: sedentary control (SC); sedentary MCT (SM); or trained MCT (TM). 2. Right ventricular hypertrophy (RVH) ...
Fotuhi Majid M Department of Neurology, Johns Hopkins University School of Medicine, and Center for Memory and Brain Health, LifeBridge Health Brain & Spine Institute, Baltimore, MD, USA. - - 2008
Studies have shown less cognitive decline and lower risk of Alzheimer's disease in elderly individuals consuming either antioxidant vitamins or nonsteroidal anti-inflammatory drugs (NSAIDs). The potential of added benefit from their combined use has not been studied. We therefore analyzed data from 3,376 elderly participants of the Cache County Study ...
Andres-Lacueva C - - 2008
Major brands of cocoa powder products present in the Spanish market were analyzed for monomeric flavanols [(+)-catechin and (-)-epicatechin] and flavonols [quercetin-3-glucuronide, quercetin-3-glucoside (isoquercitrin), quercetin-3-arabinoside, and quercetin]. In addition, the influence of the manufacturing process of cocoa powder products, in particular, the alkalinization treatment ( Dutching), on the original content ...
Pialoux V - - 2009
BACKGROUND/OBJECTIVES: We previously demonstrated that acute exposure to hypoxia (3 h at 3000 m) increased oxidative stress markers. Thus, by using the 'living high-training low' (LHTL) method, we further hypothesized that intermittent hypoxia associated with endurance training alters the prooxidant/antioxidant balance. SUBJECTS/METHODS: Twelve elite athletes from the Athletic French Federation ...
Bordenave S - - 2008
AIM: We investigated whether or not, in type 2 diabetic (T2D) patients, an individualized training effect on whole-body lipid oxidation would be associated with changes in muscle oxidative capacity. METHODS: Eleven T2D patients participated in the study. Whole-body lipid oxidation during exercise was assessed by indirect calorimetry during graded exercise. ...
Davison Gareth W - - 2008
This study tested the hypothesis that exercise-induced oxidative stress is caused by free radical-mediated damage to polyunsaturated fatty acids (PUFA) which can be prevented following ascorbate prophylaxis. Hyperfine coupling constants (HCC) of alpha-phenyl-tert-butylnitrone (PBN)-adducts were measured via room temperature electron paramagnetic resonance (EPR) spectroscopy in the venous blood of 12 ...
McAnulty Steven R - - 2008
Quercetin is a flavonoid compound that has been demonstrated to be a potent antioxidant in vitro. The objective of this study was to evaluate if quercetin ingestion would increase plasma antioxidant measures and attenuate increases in exercise-induced oxidative damage. Forty athletes were recruited and randomized to quercetin or placebo. Subjects ...
Guilherme S - - 2008
This study was carried out in the Laranjo basin (Ria de Aveiro, Portugal), an area impacted by mercury discharges. Liza aurata oxidative stress and biotransformation responses were assessed in the liver and related to total mercury (Hgt) concentrations. A seasonal fish survey revealed a sporadic increase in total glutathione (GSHt) ...
Panza Vilma Simões Pereira - - 2008
OBJECTIVE: This study investigated the effects of the consumption of green tea (GT) for 7 d on biomarkers of oxidative stress in young men undergoing resistance exercise. METHODS: Fourteen subjects performed a bench press exercise (four sets, 10 to 4 repetitions) after undergoing a period without (control group) or with ...
Skenderi K P - - 2008
BACKGROUND: Exhaustive exercise has been implicated in the generation of reactive oxygen species, resulting in oxidative stress. We studied the effect of a long-distance, endurance exercise on oxidative stress parameters in athletes who participated in the ultramarathon race Spartathlon (246 km). MATERIALS AND METHODS: This study included 18 runners (16 ...
Zembron-Lacny A - - 2008
The purpose of this study was to compare the pro-antioxidant status in healthy men exposed to muscle-damaging resistance exercise, and to investigate the practical application of Loverro's coefficient (P/A ratio) to evaluate the presence of oxidative stress. Twenty-eight healthy men were assigned to two groups performed multi-joint (M) or single-joint ...
Hudson Matthew B - - 2008
Previous research attempts to identify an oxidative stress response to acute resistance exercise have yielded mixed results. Inconsistencies in the current literature base probably reflect study-to-study variance in resistance exercise protocols; where high volume and short recovery elicit the most identifiable oxidative stress response. PURPOSE: This study examined the effect ...
Niu Ai-jun - - 2008
The aim of this study was to determine the modulatory effect of Lycium barbarum polysaccharides (LBP) on the oxidative stress induced by an exhaustive exercise. 32 male Wistar rats were taken in the study. The experiment was a 30-day exhaustive exercise program. We determined the lipid peroxidation, glycogen levels, and ...
Jammes Yves - - 2008
In healthy subjects, hypoxemia and exercise represent independent stressors promoting the exercise-induced cytokine response and oxidative stress. We hypothesized that hypoxemia in patients with chronic obstructive pulmonary disease (COPD) may affect the cytokine production and/or the changes in oxidant-antioxidant status in response to maximal exercise. Exercise-induced changes in PaO2 allowed ...
Kon Michihiro - - 2008
Intensive physical exercise may cause muscular injury and increase oxidative stress. The purpose of this study was to examine the effect of an antioxidant, coenzyme Q10 (CoQ10), on muscular injury and oxidative stress during exercise training. Eighteen male students, all elite Japanese kendo athletes, were randomly assigned to either a ...
Koçer Günnur - - 2008
Exercise-induced proteinuria is a common consequence of physical activity and is caused predominantly by alterations in renal hemodynamics. Although it has been shown that exercise-induced oxidative stress can also contribute to the occurrence of postexercise proteinuria, the sources of reactive oxygen species that promote it are unknown. We investigated the ...
Waagbø Rune - - 2008
The present experiment was conducted to examine if freshwater (FW) oxygen and carbon dioxide regimes cause physiological responses that lead to cataract formation in Atlantic salmon (Salmo salar L.) smolt. Duplicate groups of 50 g Atlantic salmon smolts were exposed to three freshwater oxygen saturation regimes (95, 112 or 125% ...
Hwang, Hye Jin
This study was intended to investigate the effects of regular swimming exercise and vitamin C supplementation on the antioxidant system following exercise stress. For the swimming exercise experiment, a swimming adaptation exercise of 1 week was given to a group of 6-week-old mice. Following this, a swimming exercise for 8 ...
Yoon, Gun-Ae
Effects of garlic powder supplementation on blood lipid profile and antioxidant system were investigated in rats with and without swimming exercise. Sprague-Dawley rats of four experimental groups were fed for 4 weeks diets containing <TEX>$15\%$</TEX> beef tallow and <TEX>$1\%$</TEX> cholesterol; control without garlic and exercise, Go with <TEX>$2\%$</TEX> garlic alone, ...
Shin Yun-A - - 2008
The purpose of this study was to determine the changes of both oxidant and antioxidant levels with exercise training in obese middle-aged women. The association between telomere length and oxidative stress with exercise was also examined. Sixteen obese middle-aged women participated in this study. The subjects were randomly divided into ...
Hsu Mei-Chi - - 2008
The purpose of this study was to evaluate the effects of Baduanjin exercise on oxidative stress, antioxidant status and quality of life in middle-aged women. A quasi-experimental design was adopted. Subjects were 31 middle-aged women. Subjects completed a supervised and standardized Baduanjin exercise program 3 times a week for 12 ...
Wang Jianxiong - - 2008
Home-based exercise training, applied as the primary treatment in patients with intermittent claudication, has produced inconsistent effects on walking capacity in previous published studies. The aim of the present study was to evaluate whether a home-based exercise training program could maintain improved walking capacity and other functional variables achieved through ...
Neubauer Oliver - - 2008
Both a systemic inflammatory response as well as DNA damage has been observed following exhaustive endurance exercise. Hypothetically, exercise-induced DNA damage might either be a consequence of inflammatory processes or causally involved in inflammation and immunological alterations after strenuous prolonged exercise (e.g. by inducing lymphocyte apoptosis and lymphocytopenia). Nevertheless, up ...
Wo┼║niak Bartosz - - 2008
BACKGROUND: Chronic alcohol consumption induces an increase in oxidative stress. There are studies that indicate changes in the activity of antioxidant enzymes and the concentration of lipid peroxidation products in the blood of organisms as a result of alcohol consumption, but published results are somewhat conflicting. The aim was to ...
Gomez-Cabrera Mari-Carmen - - 2008
BACKGROUND: Exercise practitioners often take vitamin C supplements because intense muscular contractile activity can result in oxidative stress, as indicated by altered muscle and blood glutathione concentrations and increases in protein, DNA, and lipid peroxidation. There is, however, considerable debate regarding the beneficial health effects of vitamin C supplementation. OBJECTIVE: ...
Cha Youn-Soo - - 2008
Data on the functionalities of L-carnitine on obesity, diabetes, and as an ergogenic aid are summarized as follows: Obesity: Total lipid, triglyceride, and total protein increased during the 3T3-L1 cell differentiation. However, nonesterified carnitine (NEC), acid-soluble acylcarnitine (ASAC), and acid-insoluble acylcarnitine (AIAC) concentrations were lower in the differentiated 3T3-L1 cells. ...
Cooke Matthew - - 2008
BACKGROUND: To determine whether acute (single dose) and/or chronic (14-days) supplementation of CoQ10 will improve anaerobic and/or aerobic exercise performance by increasing plasma and muscle CoQ10 concentrations within trained and untrained individuals. METHODS: Twenty-two aerobically trained and nineteen untrained male and female subjects (26.1 +/- 7.6 yrs, 172 +/- 8.7 ...
Ostojic Sergej M - - 2008
The main aim of this investigation was to evaluate the changes in total antioxidant capacity (TAC) and aerobic and anaerobic performance induced by supplementation of coffeeberry (CB) formulation for 4 weeks in college athletes. Twenty college athletes (14 males and 6 females) were allocated to two randomly assigned trials. Subjects ...
González David - - 2008
The aim of this study was to determine the effect of aerobic exercise on uric acid (UA), total antioxidant activity (TAA), lipid hydroperoxides, and nitric oxide (NO) metabolites in human saliva. Twenty-four healthy male and female subjects were studied during a 10,000-m race. Saliva samples were collected 1 h before ...
Nikolaidis Michalis G - - 2008
The aim of this article is to present the effects of acute muscle-damaging exercise on oxidative stress/damage of animal and human tissues using a quantitative approach and focusing on the time-course of exercise effects. The reviewed studies employed eccentric contractions on a dynamometer or downhill running. The statistical power of ...
Sureda Antoni - - 2008
BACKGROUND/AIMS: Our aim was to determine whether the consumption of a functional drink enriched with vitamin C and vitamin E could alleviate exercise-induced oxidative damage in lymphocytes. METHODS: Fourteen male amateur trained runners (32-36 years old) were randomized to receive antioxidant supplementation (152 mg vitamin C/day and 50 mg vitamin ...
Attipoe Selasi - - 2008
This study investigated whether postmenopausal women on HRT would experience a greater reduction in oxidative stress after 24 weeks of aerobic exercise training compared to postmenopausal women not on HRT. Plasma thiobarbituric acid reactive substances (TBARS), an indicator of oxidative stress, was measured in 48 previously sedentary postmenopausal women on ...
Bloomer Richard J - - 2008
Acute bouts of aerobic and anaerobic exercise can induce a state of oxidative stress, as indicated by an increase in oxidized molecules in a variety of tissues and body fluids. The extent of oxidation is dependent on the exercise mode, intensity, and duration, and is specifically related to the degree ...
Rizzo Annalisa - - 2008
Reactive Oxygen Species (ROS) are produced during oxidative metabolism, and regulate many biological processes. The acute inflammation characterizing parturition induces many physiological changes. Among them, there is evidence that ROS affect the synthesis of many factors involved in parturition. Our study aims to determine serum levels of ROS in periparturient ...
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