Bordj Bou Arreridj, Algeria
Bordj Bou Arreridj, Algeria

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Percario S.,Federal University of Pará | Domingues S.P.D.T.,Anhanguera | Teixeira L.F.M.,Universitary Center | Vieira J.L.F.,Federal University of Pará | And 4 more authors.
Journal of the International Society of Sports Nutrition | Year: 2012

Background: Creatine (Cr) supplementation has been widely used among athletes and physically active individuals. Secondary to its performance-enhancing ability, an increase in oxidative stress may occur, thus prompting concern about its use. The purpose of this study is to investigate the effects of Cr monohydrate supplementation and resistance training on muscle strength and oxidative stress profile in healthy athletes.Methods: A randomized, double-blind, placebo-controlled method was used to assess twenty-six male elite Brazilian handball players divided into 3 groups: Cr monohydrate supplemented group (GC, N = 9), placebo group (GP, N = 9), no treatment group (COT, N = 8) for 32 days. All subjects underwent a resistance training program. Blood samples were drawn on 0 and 32 days post Cr supplementation to analyze the oxidative stress markers, thiobarbituric acid reactive species (TBARS), total antioxidant status (TAS), and uric acid. Creatine phosphokinase, urea, and creatinine were also analyzed, as well. Fitness tests (1 repetition maximum - 1RM and muscle endurance) were performed on the bench press. Body weight and height, body fat percentage (by measuring skin folds) and upper muscular area were also evaluated. Statistical analysis was performed using ANOVA.Results: Only GC group showed increase in 1RM (54 ± 9 vs. 63 ± 10 kg; p = 0.0356) and uric acid (4.6 ± 1.0 vs. 7.4 ± 1.6 mg/dl; p = 0.025), with a decrease in TAS (1.11 ± 0.34 vs. 0.60 ± 0.19 mmol/l; p = 0.001). No differences (pre- vs. post-training) in TBARS, creatine phosphokinase, urea, creatinine, body weight and height, body fat percentage, or upper muscular area were observed in any group. When compared to COT, GC group showed greater decrease in TAS (-0.51 ± 0.36 vs. -0.02 ± 0.50 mmol/l; p = 0.0268), higher increase in 1RM (8.30 ± 2.26 vs. 5.29 ± 2.36 kg; p = 0.0209) and uric acid (2.77 ± 1.70 vs. 1.00 ± 1.03 mg/dl; p = 0.0276).Conclusion: We conclude that Cr monohydrate supplementation associated with a specific resistance program promoted a meaningful increase in muscle strength without inducing changes in body composition. The observed significant increase in uric acid and the decrease in TAS suggest that creatine supplementation, despite promoting acute effects on muscle strength improvement, might induce oxidative stress and decreases total antioxidant status of subjects. © 2012 Percário et al.; licensee BioMed Central Ltd.


Fatmi M.,Ferhat Abbas University Setif | Ghebouli M.A.,Universitary Center | Ghebouli B.,Ferhat Abbas University Setif | Chihi T.,Ferhat Abbas University Setif | And 3 more authors.
Romanian Reports of Physics | Year: 2011

We present structural, elastic, electronic, optical and thermal properties of the cubic structure Ni3Al for various pressures. The computational method is based on the pseudo-potential plane wave (PP-PW). The exchange-correlation energy is described in both generalized gradient approximation (GGA) and the local-density approximation (LDA). The calculated equilibrium lattice parameter is in a reasonable agreement with the available experimental data. The value of Debye temperature obtained using elastic constants is about 466.49 K. Applied pressure does not change the shape of the total valence electronic charge density. The Fermi level is located in the part where the nickel contribution is very strong. Most of the electronic charge density is shifted toward Ni atoms. The coefficients of electronic and lattice heat capacities were calculated. Furthermore, in order to understand the optical properties of Ni3Al, the dielectric function, absorption coefficient, refractive index and extinction coefficient are calculated for radiation up to 80 eV.


Tibana R.A.,Catholic University of Brasília | De Sousa N.M.F.,Graduation Program Interunits in Bioengineering | Da Cunha Nascimento D.,Catholic University of Brasília | Pereira G.B.,Federal University of Maranhão | And 4 more authors.
International Journal of Sports Medicine | Year: 2015

The purpose of the present study was to correlate the acute and chronic decrease in blood pressure (BP) following resistance training (RT). 13 normotensive women (18-49 years) completed an acute whole body RT session with 3 sets of 10 repetitions at 60 % 1RM and then 8 weeks of RT as follows: 3/week, 3 sets of 8-12 repetitions maximum. Systolic (SBP) and diastolic BP (DBP) were measured up to 60 min and 24 h following RT (acute and chronic). The greatest acute decrease of SBP (108.5 ± 7.0 mmHg) and DBP (71.5 ± 6.4 mmHg) values over the 60-min period were reduced compared to pre-exercise (117.3 ± 11.7 and 79.3 ± 8.2 mmHg, respectively; p < 0.05). The chronic effect on resting BP was observed only for those presenting acute post-exercise hypotension (PEH). The change in both SBP and DBP following acute RT was correlated with the chronic change in resting SBP and DBP (r > 0.5; p ≤ 0.05). The change in 24 h BP after acute RT was correlated with the chronic reduction in SBP (r = 0.74) and DBP (r = 0.80). The magnitude of PEH is a promising candidate for the prediction of individual BP-related training efficacy. © Georg Thieme Verlag KG.


PubMed | Graduation Program Interunits in Bioengineering, University of Toronto, Catholic University of Brasília, Universitary Center and Federal University of Maranhão
Type: Journal Article | Journal: International journal of sports medicine | Year: 2014

The purpose of the present study was to correlate the acute and chronic decrease in blood pressure (BP) following resistance training (RT). 13 normotensive women (18-49 years) completed an acute whole body RT session with 3 sets of 10 repetitions at 60% 1RM and then 8 weeks of RT as follows: 3/week, 3 sets of 8-12 repetitions maximum. Systolic (SBP) and diastolic BP (DBP) were measured up to 60min and 24h following RT (acute and chronic). The greatest acute decrease of SBP (108.57.0mmHg) and DBP (71.56.4mmHg) values over the 60-min period were reduced compared to pre-exercise (117.311.7 and 79.38.2mmHg, respectively; p<0.05). The chronic effect on resting BP was observed only for those presenting acute post-exercise hypotension (PEH). The change in both SBP and DBP following acute RT was correlated with the chronic change in resting SBP and DBP (r>0.5; p0.05). The change in 24h BP after acute RT was correlated with the chronic reduction in SBP (r=0.74) and DBP (r=0.80). The magnitude of PEH is a promising candidate for the prediction of individual BP-related training efficacy.


Serrano S.,Universitary Center | Figueiredo P.,Universitary Center | Pascoa Pinheiro J.,Universitary Center
American Journal of Physical Medicine and Rehabilitation | Year: 2016

Stress fractures are frequently underdiagnosed and undertreated despite being common in sports. Early diagnosis is crucial; therefore, a high index of clinical suspicion is required. Complementary examinations are essential for diagnosis and follow-up. The authors report a clinical case of a young adult triathlon athlete referring mechanical pain in the rear left foot, with 2 weeks' progression. An earlier increase in daily training intensity was recorded. Complementary examinations confirmed a calcaneal fatigue fracture. Immobilization and no weight bearing were introduced for an initial period of 4 weeks, and the rehabilitation process was started. Progressive weight bearing was introduced between fourth and eighth weeks. Sports activity started at the 12th week. Boundaries to sports activity were eliminated by the 24th week, without pain or functional limitation. Repetitive overload to the heel and intense axial weight bearing in association to repetitive concentric/eccentric gastrocnemius contraction are related to calcaneal stress fracture, the second most common stress fracture in the foot. Calcaneal stress fractures can be adequately treated with activity modification, without casting or surgical intervention. When in the presence of bilateral stress fractures, metabolic and nutritional issues must be considered. The case report highlights the importance of sports medicine examination for detecting intrinsic and extrinsic fatigue fracture risk factors. © 2016 Wolters Kluwer Health, Inc.


Fatmi M.,Ferhat Abbas University Setif | Ghebouli B.,Ferhat Abbas University Setif | Ghebouli M.A.,Universitary Center | Chihi T.,Ferhat Abbas University Setif | Abdul Hafiz M.,Damascus University
Physica B: Condensed Matter | Year: 2011

The isothermal and non-isothermal ageing of an Al-2.4 wt% Cu alloy have been studied using X-ray diffraction analysis and differential scanning calorimetry (DSC) at different heating rates. Quantitative metallography methods have been applied to measure the corresponding transformed volume fractions at various temperatures and times of precipitation. The variation of the heating rate using DSC technique has allowed us to calculate two kinetics parameters of precipitation which are the Avrami exponent and the activation energy of the process using Kissinger, Ozawa and Bosswell methods. These parameters are similar to those found for the precipitation reaction of θ′ and θ (Al2Cu) phases. © 2011 Elsevier B.V. All rights reserved.


Ghebouli M.A.,Universitary Center | Ghebouli B.,Ferhat Abbas University Setif | Fatmi M.,Ferhat Abbas University Setif | Bouhemadou A.,Ferhat Abbas University Setif | Bouhemadou A.,King Saud University
Solid State Communications | Year: 2011

Various physical properties of the cubic perovskite-type oxide BiScO 3 have been investigated using the pseudo-potential plane-wave (PP-PW) method based on the density functional theory (DFT). The computed equilibrium lattice parameters agree well with the available theoretical data. The elastic constants and their pressure dependence are predicted using the static finite strain technique. A set of isotropic elastic parameters and related properties, namely bulk and shear moduli, Young's modulus, Poisson's ratio, average sound velocity and Debye temperature are numerically estimated in the framework of the VoigtReussHill approximation for BiScO3 polycrystalline aggregate. The analysis of the site-projected l-decomposed density of states, charge transfer and charge density shows that bonding is predominantly of ionic nature. We distinguish hybridization between Sc-d states and O-p states in the valence bonding region. Through the quasi-harmonic Debye model, in which the phononic effects are considered, the thermal effect on the lattice constant, bulk modulus, heat capacities and thermal expansion coefficient is calculated. © 2011 Elsevier Ltd. All rights reserved.


Ghebouli M.A.,Universitary Center | Ghebouli B.,Ferhat Abbas University Setif | Fatmi M.,Ferhat Abbas University Setif
Physica B: Condensed Matter | Year: 2011

The structural, elastic, electronic, optical and thermal properties of the semiconductor perovskite CsPbCl3 were investigated using the pseudo-potential plane wave (PP-PW) scheme in the frame of generalized gradient approximation (GGA) and local density approximation (LDA). The computed lattice constant agrees reasonably with experimental and theoretical ones. The CsPbCl3 crystal behaves as ductile material. The valence bands are separated from the conduction bands by a direct band gap RR. We distinguished hybridization between Pb-p states and Cl-p states in the valence bonding region. Under compression at P=30 GPa, this material will have a metallic character. The thermal effect on the lattice constant, bulk modulus, Debye temperature and heat capacity CV was predicted using the quasi-harmonic Debye model. To the authors knowledge, most of the studied properties are reported for the first time. © 2011 Elsevier B.V. All rights reserved.


Ghebouli M.A.,Universitary Center | Ghebouli B.,Ferhat Abbas University Setif | Bouhemadou A.,Ferhat Abbas University Setif | Bouhemadou A.,King Saud University | And 2 more authors.
Solid State Sciences | Year: 2011

The structural, elastic, electronic, optical and thermodynamic properties of the cubic perovskite-type hydride KMgH3 have been investigated using pseudo-potential plane-wave method based on the density functional theory. Computed equilibrium lattice constant agrees well with the available experimental and theoretical data. The elastic constants and their pressure dependence are predicted using the static finite strain technique. A linear pressure dependence of the elastic stiffnesses is found. A set of isotropic elastic parameters and related properties, namely bulk and shear moduli, Young's modulus, Poisson's ratio, average sound velocity and Debye temperature are numerically estimated in the frame work of the Voigt-Reuss-Hill approximation for KMgH3 polycrystalline aggregate. The analysis of the site-projected l-decomposed density of states and charge density shows that the bonding is predominantly of ionic nature. Through the quasi-harmonic Debye model, in which the phononic effects are considered, the temperature effect on the lattice constant, bulk modulus, heat capacity and Debye temperature is calculated. © 2010 Elsevier Masson SAS. All rights reserved.


The aim of this study was to determine the prevalence and to identify the risk factors associated with Leptospira spp. infection in technified pig farms in the state of Alagoas, Brazil. To compose sample for the prevalence study, 342 pigs were used (312 sows and 30 boars) proceeding from seven swine farms distributed in five districts of the state of Alagoas, Brazil. The infections serological diagnosis was performed by microscopic agglutination test. The risk factors analysis was performed using research questionnaires consisting of objective questions related to the breeder, the general characteristics of the property, and the productive, reproductive and sanitary management. Prevalence of 16.1% (55/342) of pigs seropositive was obtained. The associated risk factors were not performing quarantine (P = 0.003, OR = 5.43, CI = 1.79-16.41) and the use of artificial insemination (P = 0.023, OR = 3.38, CI = 1.18-9.66). A significant association of sow infection with the increased number of stillborn and mummified foetuses was found, as well as with the increased frequency of oestrus recurrence and the increased weaning-to-oestrus interval of seropositive sows. One might state that Leptospira spp. infection is disseminated in technified pig farms in the State of Alagoas, favouring reproductive failures and the impairment of zootechnical performance in these properties. The risk factors identified in this study are facilitators in the infecting agent dissemination and should be adjusted to control the disease in the herds studied.

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