Rafael Pereira

Rafael Pereira
Universidade Estadual do Sudoeste da Bahia | UESB · Department of Biological Sciences (DCB)

PhD

About

146
Publications
55,625
Reads
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1,429
Citations
Citations since 2017
71 Research Items
1189 Citations
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
Additional affiliations
April 2010 - present
Universidade Estadual do Sudoeste da Bahia
Position
  • Professor / Researcher
February 2005 - December 2009
Universidade Iguaçu
Position
  • Professor / Researcher

Publications

Publications (146)
Article
Purpose Endurance performance has been enhanced both by carbohydrate mouth-rinsing (CHO-MR) and allowing subjects to view an artificially slowed clock. Taste sensitivity and perception of time are altered in older men. We assessed the effects of CHO-MR and clock manipulation (ClkM) on running performance and ratings of perceived exertion (RPE) in o...
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We investigated the magnitude of exercise-induced changes in muscular bioenergetics, redox balance, mitochondrial function, and gene expression within 24 h after the exercise bouts performed with different intensities, durations, and execution modes (continuous or with intervals). Sixty-five male Swiss mice were divided into four groups: one contro...
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Citation: Cerqueira, M.S.; Lira, M.; da Silva, R.S.; Machado, M.; Pereira, R. Effects of Blood Flow Restricted Exercise on Electromechanical Delay and Time to Peak Force after Task Failure: A Randomized Crossover Trial. Muscles 2022, 1, 133-142. Abstract: Introduction: Electromechanical delay (ED) and time to peak force (TPF) could be used to inves...
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Creatine monohydrate supplementation in females is largely under-represented in the literature, and their potentially differential hemodynamic responses are unknown. Methods: Twentyeight resistance-trained women (25.5 ± 6.1 years, 59.7 ± 6.3 kg, 163 ± 5 cm) were randomly assigned to the supplement creatine monohydrate (CRE; 5 g creatine monohydrate...
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Cisplatin is an effective antineoplastic agent, but its use is limited by its nephrotoxicity caused by the oxidative stress in tubular epithelium of nephrons. On the other hand, regular exercise provides beneficial adaptations in different tissues and organs. As with many drugs, dosing is extremely important to get the beneficial effects of exercis...
Article
The purpose of this study was to test whether believed versus actual acute creatine ingestion impacted resistance exercise performance. Fifteen men (21.9 ± 2.7 years old) completed four bouts of three sets each of squat and bench press to volitional fatigue at a 10RM load with 1-min between-sets rest interval. Thirty minutes prior to each exercise...
Article
Regular physical training and cigarette smoke exposure (CSE) have opposite effects on physical performance, antioxidant, and inflammatory profile. However, the interaction between these events is not well studied. We aimed to investigate how regular physical training and CSE interact, and in what is the outcome of this interaction on the physical p...
Article
PurposeThe safety of creatine supplementation has been investigated, however, the safety of a high-dose/short-term or low-dose/long-term supplementation dosing scheme, combined with a resistance training program, a commonly used dosing scheme, has not yet studied. The aim of this study was to evaluate physical performance and the safety of the cite...
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Objectives: The maintenance of the postural balance is fundamental for the daily living activities, as well as for the practice of physical exercise. However, the aging process and sedentary behavior (i.e., large sitting time) lead to changes biological systems, impairing postural balance with consequent increased falls risk. On the other hand, phy...
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The present study was designed to investigate the effects of different caffeine dietary strategies to compare the impact on athletic performance and cardiac autonomic response. The order of the supplementation was randomly assigned: placebo(4-day)-placebo(acute)/PP, placebo(4-day)-caffeine(acute)/PC and caffeine(4-day)-caffeine(acute)/CC. Fourteen...
Article
Background Human gait is a complex task resulting from the interaction of sensory perception, muscle force output, and sensory-motor integration, which declines with the aging process and impacts gait speed in older women. Research question What are the separate and combined impacts of sensory-motor factors on gait speed of older women? Methods S...
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Background Walking speed discriminates levels of functionality in stroke survivors, but its relationship with neuromuscular parameters remains unclear. We aimed to (1) verify relationships between walking speed, peak torque, and rate of torque development in individuals with chronic stroke and (2) investigate whether adjusting the predictive model...
Article
Maintaining adequate body water balance is one aim of hemodialysis that is obtained by changing the blood volume. However, it is known that volume withdrawal is followed by water redistribution between extra- and intra-cellular spaces. In this context, the skeletal muscle tissue represents almost 50% of the total body mass, and like other soft tiss...
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Pseudomonas aeruginosa is an opportunistic bacterium in patients with cystic fibrosis and hospital acquired infections. It presents a plethora of virulence factors and antioxidant enzymes that help to subvert the immune system. In this study, we identified the 2-Cys peroxiredoxin, alkyl-hydroperoxide reductase C1 (AhpC1), as a relevant scavenger of...
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Blood flow restriction (BFR) training combines exercise and partial reduction of muscular blood flow using a pressured cuff. BFR training has been used to increase strength and muscle mass in healthy and clinical populations. A major methodological concern of BFR training is blood flow restriction pressure (BFRP) delivered during an exercise bout....
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Abstract The objective of this study was to use the passion fruit peel P. cincinnata Mast., as a viable alternative to produce food (flour and cookies) that is rich in fiber and environmentally sustainable. For this, fruit peels were obtained, which were hygienized, dehydrated and ground in a knife mill in order to develop the flour, which was then...
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Objectives: To compare the short- and long-term effects of low load blood flow restriction (LL-BFR) versus low- (LL-RT) or high-load (HL-RT) resistance training with free blood flow on myoelectric activity, and investigate the differences between failure and non-failure protocols. Data Source: We identified sources by searching the MEDLINE/PUBMED,...
Article
Background The effects of ischemic preconditioning (IPC) versus a deceptive sham protocol on indirect markers of exercise-induced muscle damage (EIMD) after the application of individualized occlusion pressure were examined. The goal of using a sham protocol is to control for the potential effect of placebo. Hypothesis IPC would surpass the sham p...
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Introduction. The Olympic weightlifting movements (snatch, clean and jerk) and their variations (snatch and clean deadlift, high pull, etc.) have been widely used in order to improve performance in many sports, but there are no normative data, nor data on reliability of kinematic parameters for power snatch from recreational weightlifters. Aim of S...
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The relationship between the Renin-Angiotensin-Aldosterone System (RAAS) and modulation of the Autonomic Nervous System (ANS) is reported as complex and bidirectional. Thus, the present study aimed to compare autonomous heart control, through symbolic analysis parameters, in the older adults carrying different ACE I/D gene polymorphisms (rs4646994)...
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Background. Low-intensity exercise with blood flow restriction (BFR) may improve muscle mass and strength but an early neuromuscular fatigue may occur. Since the mechanisms of fatigue during BFR exercise is not yet fully understood we examined, concomitantly, the coefficient of variation of force (CVf) and surface electromyographic signal (sEMG) du...
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Creatine enhances resistance training adaptations and may alter ratings of perceived exertion (RPE). Planned load reduction training (10% reduction in load per set) lowered RPE compared to traditional fixed load resistance training (3 sets at a constant load) with similar muscle adaptations. The purpose was to examine the effects of creatine on per...
Article
Cigarette smoke is a complex mixture capable of triggering inflammation and oxidative damage in animals at the pulmonary and systemic levels. Tempol (4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl) reduces tissue injury associated with inflammation in vivo by mechanisms that are not completely understood. Here we evaluated the effect of tempol on i...
Article
Objective To investigate the association between sarcopenia and different anthropometric indicators, and identify the best indicator to discriminate sarcopenia in community-dwelling older adult women. Method Data from 173 older adult women (≥60 years), living in Lafaiete Coutinho, a small-sized city in northeastern Brazil, were analyzed. Sarcopeni...
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The Brazil, along the last years, has experienced an increase in the incidence rate of congenital syphilis. Thus, the aim of this article was to analyze the profile of scientific production regarding this issue. The present study is a bibliometric review o f the scientific production about congenital syphilis recorded from 2014 to 2018. The data...
Article
Purpose This study aimed to compare heart rate variability (HRV) parameters obtained through symbolic analysis (SA), between older adults with and without hyperuricemia. Methods This is a cross-sectional study including 202 community-dwelling old adults, which was clinically stratified as with or without hyperuricemia, according to the cutoff poin...
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Os registros dos potenciais bioelétricos do coração são datados há mais de um século, e atualmente são utilizados tanto no contexto da clínica para instituição de diagnósticos, quanto para ensino e pesquisa nas áreas das ciências médicas. O objetivo desse estudo foi construir um equipamento de baixo custo, capaz de registrar e salvar em computador...
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Background: The inclusion of gymnastic-based movements in workout routines in many exercise training programs, generally called mixed modality training (MMT), and even in many competitions, is increasingly common. In contrast to artistic gymnastic competitions, MMT workouts aim to complete as many movements as quickly as possible, which tends to de...
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Aim: Our purpose was to determine whether Transcranial Direct Current Stimulation (tDCS) improves performance in untrained individuals for supramaximal intermittent exercise. Methods: In a cross-over design, 11 healthy male subjects (26.8 ± 4.6 years) performed four Wingate trials after 20 minutes of anodal or sham tDCS over the left Insular Corte...
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Introduction: The variability of successive RR intervals has been pointed out as an indicator of systemic homeostasis. The entropy of successive RR intervals is associated with a greater adaptive capacity, which is essential after childbirth, characterized by a change from an intrauterine environment that constantly adapts to the fetal demands, to...
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Resumo Objetivou-se avaliar a capacidade para o trabalho de mototaxistas e sua associação com fatores sociodemográficos, laborais e qualidade de vida. Estudo transversal, realizado com 392 mototaxistas, utilizando-se formulário com dados sociodemográficos, laborais, Índice de Capacidade de Trabalho e o WHOQOL-bref. Empregou-se análise descritiva e...
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Photobiomodulation (PBM) by low-level laser has demonstrated excellent results for inflammatory treatments, promoting repair of injured tissues. Knowledge regarding the molecular mechanisms involved in this process has been increasing, but its effect on cell death/survival-related gene expression after laser irradiation with different doses is not...
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The authors wish to clarify that Fávia de Paoli refers to “Flávia de Paoli”. The authors apologise for this error.
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Objective: to investigate the association between hypertension and anthropometric indicators of central obesity, obtained from two anatomical sites in old adults. Methodology: a cross-sectional study including 145 elderly people, from whom socioeconomic and demographic data and anthropometric indicators of central obesity (Waist Circumference [CC]...
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Background: Depression and hypertension are highly prevalent among elderly people. Although the relationship between these conditions is well recognized, however, the factors that may influence such association are not clearly understood. Objective: To analyze the association between depression and hypertension in community-dwelling elders. Metho...
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Aim: To investigate the neuromuscular fatigue and recovery after an intermittent isometric handgrip exercise (IIHE) executed until failure with different blood flow restriction (BFR) conditions (free flow, partial and total vascular restriction). Methods: Thirteen healthy men carried out an IIHE at 45% of maximum voluntary isometric force (MVIF) u...
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Heterozygosis for the hemoglobin S allele is a relatively common condition that is clinically benign and rarely presents clinical or hematological manifestations. Although rare, symptoms have been reported in these patients. We examined clinical manifestations and laboratory findings in HbAS individuals that could be related to the β S haplotypes:...
Article
Objective: To investigate the association between sarcopenia and different anthropometric indicators, and identify the best indicator to discriminate sarcopenia in community-dwelling older adult women. Method: Data from 173 older adult women (≥60 years), living in Lafaiete Coutinho, a small-sized city in northeastern Brazil, were analyzed. Sarco...
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Objective: to analyze the factors associated with the severity of scorpionism, according to sociodemographic, clinical and epidemiological aspects. Method: a cross-sectional study was carried out, in 2017, with data extracted directly from the Epidemiological Investigation Records of the Information System for Notifiable Diseases, for the period fr...
Book
Dificilmente será possível ler sobre o contexto da ciência no Brasil sem que o leitor se depare com relatos acerca das dificuldades na produção de trabalhos científicos, dada a carência de planejamento e recursos para ensino e pesquisa. E note que, mesmo com vento a favor, fazer ciência não é fácil. Qualquer pessoa que já realizou experimentos...
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Background and aims: Aging, obesity and sedentarism are among the most important predictors of cardiometabolic diseases. Aiming to reduce the impact of the combination of these three factors, we tested the therapeutic and preventive effects of exercise in aging and obese rats on the following cardiometabolic disease risk parameters: body fat, bloo...
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To investigate whether whole body vibration (WBV) training increases the explosive force of the knee extensors in chronic kidney disease (CKD) patients. Fourteen CKD patients undergoing hemodialysis were randomly allocated in WBV training or Sham group. Explosive force parameters (contractile impulse [CImp] and relative rate of force development [R...
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Hypercholesterolemia is a worldwide public health problem, contributing to cerebrovascular and ischemic heart diseases as one of the major cardiovascular risk factors, and associated with approximately 4.4 million deaths each year worldwide. This study aimed to evaluate the association and predictive value of increased waist circumference (WC) to i...
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We describe discrepant behavior of serum creatine kinase (CK) activity during and after cycling in a hypertensive athlete when compared to the healthy athletes from the same team of endurance cyclists. Heart Rate (HR), Blood Pressure (BP), Perceived Exertion (PE) and serum CK activity were evaluated before, during and after 150 km indoor cycling. T...
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Introduction: It is well known that familial or genetic heritage is closely associated to hypertension. Thus the present study aimed to investigate BP response to resistance exercise from young normotensive subjects with (WFHH) and without (WTFHH) familial history of hypertension (FHH). Material and Methods: Forty-nine healthy male, engaged in mili...
Article
It is known that sarcopenia is a multifaceted phenomenon, which involves genetic, nutritional, hormonal and living habits aspects. Then, an integrated analysis, as a multivariate approach, could improve the comprehension about the determinants of sarcopenic state in old adults. The present study aimed to investigate the interaction among serum vita...
Article
This study aimed to compare the heart autonomic control (HAC) response during two time-limited physical workouts using linear and nonlinear methods. A total of 20 healthy volunteers performed two physical workouts lasting 5 (P5) and 10 min (P10). In both workouts, volunteers performed as many repetitions as possible within the time limit of sets of...
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The angiotensin-converting enzyme insertion/deletion (I/D) gene polymorphism has been widely reported as being associated with hypertension; however, most studies do not consider environmental/behavioral factors. This study aimed to investigate the relationship among angiotensin-converting enzyme insertion/deletion gene polymorphism, environmental/...
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Background and objective: Diabetes mellitus is one of the most common non-communicable diseases (NCDs) and may influence the autonomic nervous system. This study aims to analyze the autonomic control, through heart rate variability (HRV), from community-dwelling elders with (DM+) and without diabetes mellitus (DM-). Materials and methods: This c...
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Objective: The objective of this study was to investigate the association between biological-health, socioeconomics, and behavioral determinants and stroke by evaluating the risk of stroke in the presence of each or all determinants grouped in a multivariate model. Methods: This study is a transversal secondary data analysis of the Brazilian Nat...
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The hypertriglyceridaemic waist (HW) phenotype is defined as the combination of high waist circumference and high fasting blood triglyceride concentrations. It has been widely used as a marker of cardiometabolic risk; however, there is no consensus on the waist circumference and triglyceride levels that should be used to define this phenotype. Prev...
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Introduction: The aging process leads to functional decline of sensorial organs, muscle mass and strength, as well as the sensorimotor integration, culminating in age-associated postural control impairments. The purpose of this study was to compare the balance, the sensorial integration process and the lower limb strength among three old aged group...
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Background/Study Context: The aging process is associated with a decline in muscle mass, strength, and conditioning. Two training methods that may be useful to improve muscle function are Pilates and proprioceptive neuromuscular facilitation (PNF). Thus, the present study aimed to compare the influence of training programs using Pilates and PNF met...
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The aim of this study was to examine the influence of caffeine supplementation (4.5 mg ⋅ kg−1) on lower body resistance training performance preceded with and without an acute bout of endurance exercise. In a double-blinded crossover study, 10 moderately active males (20.6±2.1 yo) carried out six exercise sessions (2 x 1RM sessions; 2 x resistance...
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Objectives: The purpose this study was investigate the effects of different vascular occlusion levels (total occlusion (TO), partial occlusion (PO) or free flow (FF)) during intermittent isometric handgrip exercise (IIHE) on the time to failure (TF) and the recovery of the maximum voluntary isometric force (MVIF), median frequency (EMGFmed) and pea...
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Older adults are more variable than young adults on tasks that demand the simultaneous control of more than one effector, and the difference between age groups may be related to their different capacity of coordinating the force output of the involved effectors. The goal of this study was to determine whether age-associated differences in motor out...
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Excessive and continuous stress has effects that go beyond mere health commitment, by triggering various diseases, and it is well stablish that this stress-related somatic events can affect the quality of life. Based on the exposed, the following questions were raised: There is association between quality of life and stress level in university stud...
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Objective: The present study aimed to analyze the influence of smoking on the heart autonomic control in old adults with and without smoking habit. Methods: In a population-based study, all community-dwelling old adults (≥60 years old) from Aiquara, Bahia, Brazil, were invited to participate in the study. Two hundred and thirty-two (232) old adu...
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Purpose: Falls are one of the main disabling events for the old adults and the identification of old people prone to falls enables the development of preventive and rehabilitative strategies. This study aimed to develop a simple tool, based on easily obtained variables (anthropometric measurements, motor performance tests and sociodemographic chara...
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This study aimed to investigate the effect of trunk extensor muscles fatigue, through a submaximum and time-limited isometric task, on the postural control and sensorimotor integration of young healthy adults. Previously and after a submaximum and time-limited isometric fatigue protocol of trunk extension muscles, 30 s stabilometric recordings were...
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Introduction the treatment of Class III malocclusion in early age is one of the greatest challenges for orthodontists, and the establishment of more effective treatment method is a constant concern for these professionals. Thus, the objective of this systematic review is to verify the effectiveness of the therapy protocol for alternate rapid maxill...
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1. In this cross-sectional study, potential factors associated with impaired glycaemic state (IGS) were explored in a cohort of 316 people aged ≥60 years in Brazil. 2. In the final logistic regression model, IGS was found to be associated with waist circumference in men and BMI in women. 3. Cutoff points of >101 cm for waist circumference and 29 kg...
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This study verifies if caffeine supplementation delays the onset of fatigue, enhancing performance, and whether this effect is due to modulation of the caffeine in the rating of perceived exertion, motor drive activation, autonomic nervous system, and energy metabolism. Nine recreational athletes were submitted to two constant load tests after supp...