Gleber Pereira

Universidade Federal do Paraná | UFPR

Purpose To compare the development of fatigability during a moderate intensity cycling exercise between women with fibromyalgia (FM) and control women (CON) after acute ingestion of caffeine and placebo. Methods Ten FM and 10 CON women performed a 30-minute moderate intensity cycling exercise one hour after the ingestion of a capsule containing ei...

In sports, athletes might train or compete with some degree of mental fatigue that has an impact on performance. The present study investigated the effect of strategic motivational self-talk on endurance performance in mentally fatigued individuals. Twelve healthy men performed three cycling endurance tests at 80% peak power output until exhaustion...

Background Nursing home residents are likely to differ from community older adults when their gait parameters are compared, as nursing home residents present more falls Aim The study aim was to identify the main fall occurrence predictors (anthropometrics, functional and gait-related parameters) between older adults living in community and nursing...

Purpose Caffeine improves cycling time trial (TT) performance; however, it is unknown whether caffeine is ergogenic when competing against other riders. The aim of this study was to investigate whether caffeine improves performance during a 4-km cycling TT when riding against a virtual opponent, and whether it is associated with increased muscle ac...

This study compared central and peripheral fatigue development between the Sprint and Olympic distance triathlon. Fifteen male triathletes performed Sprint and Olympic triathlon simulations in a randomized and counterbalanced order. Central and peripheral fatigue was evaluated from changes in voluntary activation level (VAL) and twitch responses of...

This study investigated the extent to which mental fatigue and emotional suppression affected exercise endurance. Twelve participants performed cycling endurance tests at 80% of their peak power up to the point of exhaustion. Two experimental conditions (mental fatigue [MF] and emotion suppression conditions [ES]) and a control condition (CO) were...

Aim: To compare muscle function of knee extensors, gait parameters, and physical function in older women with and without knee osteoarthritis (KOA) and to associate these parameters to the KOA incidence in this population. Methods: Sixteen older women with KOA (66.9 ± 5.5 years; 74.9 ± 10.0 kg; 157.9 ± 0.9 cm; 30.2 ± 5.0 kg/m²) and fourteen health...

The aims of this study were to perform the cross-cultural adaptation of the Borg Rating of Perceived Exertion (RPE) 6–20 Scale to Brazilian Portuguese language and to start testing its validity and reliability. After performing the cross-cultural adaptation of the Scale, concurrent and discriminative validity, and reliability were determined on a t...

Introduction: It is believed that functional capacity and fall history are factors capable of influencing the gait parameters of older adults. Thus, the objective of this study was to verify whether gait parameters of community-dwelling older adults differ according to their functional capacity and fall history when walking at self-selected walkin...

Aim: The aim of this cross-sectional study was to determine which functional tests are able to predict falls in nursing home residents (NHR) and community-dwelling (CDW) older adults grouped by age. Methods: Two hundred and fifty-two older adults were assessed in the following tests, Mini-Mental State Examination, anthropometric characteristics, fa...

Objective: The aim of this study was to compare the effects of multicomponent and strength training programs on dynamic balance, functional capacity, and gait ability in older women. Methods: Thirty individuals (67 ± 4.3 years; 30.6 ± 3.9 kg/m2) were trained for 12 weeks (3 times per week), following multicomponent (MG: exercises focusing on agi...

Aims: One of the common sequelae of chronic abuse of alcohol and/or illicit drugs is the impairment of body balance control, caused by long-term neurological damage. This study aimed to investigate the postural control of individuals hospitalized for the treatment of substance use disorder (initial phase) and to compare the results obtained by a co...

Aims To verify the effects of aquatic exercises performed with high-speed movement on physical function, muscle function, and quality of life of older women with knee osteoarthritis (KOA). Methods This was a single-group experimental study with double pretest and a post-test. Dependent outcomes were assessed three times: 4 weeks before the interve...

Aim This study aimed to determine the association of handgrip strength with isometric and isokinetic strength (hip, knee and ankle extensor/flexor muscles), and functional capacity in older women. Methods The handgrip strength and lower limb strength of 199 older women (60–86 years) were measured using JAMAR and BIODEX dynamometers, respectively....

The influence of cyclists’ performance levels on caffeine-induced increases in neuromuscular fatigue after a 4-km cycling time trial (TT) was investigated. Nineteen cyclists performed a 4-km cycling TT 1 h after ingesting caffeine (5 mg·kg ⁻¹ ) or placebo (cellulose). Changes from baseline to after exercise in voluntary activation (VA) and potentia...

Objective: It is not known if the intensity in which exergames are performed can change gait parameters at different walking speeds. This study was designed to determine if a training program based on exergame exercises performed at different intensities (moderate vs. vigorous) influences walking speed and gait parameters in older adult women. Met...

The aim of this study was to compare the effects of an instructional and a motivational self-talk intervention on swimming endurance performance in amateur triathletes. To this purpose, we designed a parallel two groups, randomised, longitudinal (pre- and post-test) study. During 12 days in all exercise-training sessions, the motivational self-talk...

The aims of this study were to perform the cross-cultural adaptation of the Borg Rating of Perceived Exertion (RPE) 6–20 Scale to Brazilian Portuguese language and to start testing its validity and reliability. After performing the cross-cultural adaptation of the Scale, concurrent and discriminative validity, and reliability were determined on a t...

Neuromuscular electrical stimulation is a method widely used as an additional tool to evaluate the neuromuscular function. The difference of pulse duration can influence the torque and Electromyography, however, their effects have not widely studied. Therefore, the aim of the study was to analyze the effects of pulse duration on torque as well as i...

Aims: This study tested whether performing exergames with and without additional external load could induce to different internal load demand for young adults. Methods: Fifteen young women (24.4 ± 4.06 years) participated in the study. Electromyography (EMG) activity, heart rate (HR) and overall and local rating of perceived exertion (RPE) were det...

The aim of this study was to compare the effects of two exercise intensities on exergame training program in muscle strength, functional capacity and perceptual parameters in pre-frail older women. Thirty-four women (69.5 ± 5.4 years) were randomly assigned to either moderate- (MG: 11–13 perceived exertion) or vigorous-exercise intensity group (VG:...

Background: Dependence in self-care activities among older women has been previously evaluated through performance-based tests. However, these tests have presented inability to accurately distinguish between dependent and independent older adults in performing activities of daily living. Aim: To examine the validity, reliability, and diagnostic acc...

The purpose of this study was to investigate the effects of multicomponent training program, designed to improve the torque around the ankle joint performing high-speed movement execution, on healthy older adults. Participants were balanced by torque around the ankle joint and randomly allocated to either exercise (n=12, 69.7±4.8 years, 74.6±16.8 k...

The aims of this study were to examine whether: i) functional capacity and physical activity level differ between fallers and non-fallers older adults, by controlling for fall risk awareness; ii) functional capacity, fall risk awareness and physical activity differ between fallers and non-fallers older adults, by controlling for age; iii) variables...

Approximately 21% of the falls in older adults occur due to tripping, while walking. There is a paucity of information regarding the gait variability and reliability when a tripping is induced in different days mainly with elderly. It was aimed to analyze the variability and the reliability (intra- and inter-day) of spatiotemporal gait parameters a...

The aims of this study were to investigate whether land-based and tethered swimming strength tests can explain swimming performance in 200-meter front crawl and, whether these tests were able to identify bilateral symmetry in force production. In the first session, eighteen swimmers completed a maximum effort 200 m front crawl swim (swimming perfor...

The aim of this study was to evaluate the effects of stretching training in the capacity of hamstring muscles torque maintenance in male young adults. Thirty-eight volunteers were randomly divided into two groups: Stretching Group (SG, n = 19) and Control Group (CG, n = 19). The training protocol consisted of three different static stretching exerc...

The aim of this systematic review was to analyze the cross-cultural adaptation and validation processes of Borg’s Rating of Perceived Exertion Scale (6-20) and its instructions during exercise in adults and the elderly. The study was conducted using databases that include the areas of health, sports and psychology (Pubmed, ScienceDirect, Bireme (BV...

The aim of this study was to determine if rating of perceived exertion (RPE) could be used to monitor the internal load during compounded circuit training (CCT) sessions in women. Thirteen young adults women performed three sessions of CCT varying the intensity according to participants' maximum heart rate (50, 70 and 90%HRmax). Throughout the main...

It has been proposed that muscle power is more effective to prevent falls than muscle force production capacity, as rapid reactions are required to allow the postural control. This study aimed to compare the effects of strength and power training on lower limb force, functional capacity and static and dynamic balance in older female adults. Thirty-...

Background: The five-kilometer time trial (TT5km) has been used to assess aerobic endurance performance without further investigation of its validity. Objectives: This study aimed to perform a preliminary validation of the TT5km to rank well-trained cyclists based on aerobic endurance fitness and assess changes of the aerobic endurance performance...

The aim was to compare the effects of 12 weeks of strength and power training on peak torque, rate of torque develop- ment, and dynamic force in elderly people. Thirty-four elderly people were divided into strength training (ST) (n = 13; 67 ± 10.2 years), power training (PT) (n = 10; 63.3 ± 3 years), and control group (n = 11; 65 ± 1.75 years). The...

The mechanisms and concepts of perceived exertion have changed over the years. Thus, the objectives of the present literature review were i) to investigate the literature reviews that have been published since 1982 and to describe the proposed causal mechanisms of perceived exertion, and ii) to determine whether the concepts of perceived exertion h...

The aim of this study was to describe the intersegmental coordination and segmental contribution during intermittent vertical jumps performed until fatigue. Seven male visited the laboratory on two occasions: 1) the maximum vertical jump height was determined followed by vertical jumps habituation; 2) participants performed intermittent countermove...

It was aimed to determine the effects of a plyometric long jump training program on torque around the lower limb joints and swimming jump start kinetic and kinematic. Ten swimmers performed three identical assessment sessions, measuring hip and knee muscle extensors during maximal voluntary isometric contraction and, kinetic and kinematics paramete...

The aims of this study were to determine whether propulsive force (peak force, mean force, impulse, rate of force development) and stroke rate change during two minutes of front crawl tethered-swimming and to correlate them with the stroke rate and swimming velocity in 200m-front crawl swimming. Twenty-one swimmers (21.6±4.8 years, 1.78±0.06 m, 71....

The mechanisms underpinning fatigue and exhaustion, and the specifi c sources of exercise-endurance intensity regulation and (in)tolerance have been investigated for over a century. Although several scientifi c theories are currently available, over the past fi ve years a new framework called Psychobiological model has been proposed. This model giv...

This study aimed to determine whether: i) tethe-red-swimming can be used to identify the asymmetry during front crawl swimming style; ii) swimmers that perform unilateral breathing present greater asymmetry in comparison to others that use bilateral breathing; iii) swimmers of best performance present smaller asymmetry than their counterparts; iv)...

To analyze the effects of a water-based exercise program on peak torque (PT) and rate of torque development (RTD) during maximal voluntary ballistic isometric contractions of the lower limb muscles and the performance of a number of functional tests in the elderly. Thirty-seven elderly were randomly assigned to water-based training (3 d/wk for 12 w...

Muscle force and functional capacity generally decrease with aging in the older population, although this effect can be reversed, attenuated, or both through strength training. Fish oil (FO), which is rich in n-3 (omega-3) PUFAs, has been shown to play a role in the plasma membrane and cell function of muscles, which may enhance the benefits of tra...

This study aimed at comparing the effects of strength and power training regimens on neuromuscular adaptations and changes on vertical jump performance, kinetics and kinematics parameters. Forty physically active males (178.2±7.0 cm; 75.1±8.6 kg; 23.6±3.5 years) with at least two years of strength training experience were assigned to a strength tra...

The aim of this study was to compare the power outputs of the intermittent critical power (CPi) with the intermittent maximal lactate steady state (MLSSi) and to compare the physiological and perceptual responses exercising at CPi and MLSSi. Ten subjects performed intermittent trials on a cycle ergometer to determine CPi and MLSSi using 30:30 secon...

The aims of this study were (a) to assess the ability of the rating of perceived exertion (RPE) to predict performance (i.e. number of vertical jumps performed to a fixed jump height) of an intermittent vertical jump exercise, and (b) to determine the ability of RPE to describe the physiological demand of such exercise. Eight healthy men performed...

The aims of this study were to verify the relationship between rating of perceived exertion (RPE) and electromyography (EMG) increases during exhaustive constant-load cycling bouts and, to compare and to correlate the power outputs corresponding to perceived exertion threshold (PET) and neuromuscular fatigue threshold (NFT). 11 men completed 3-4 di...

This study aimed to determine if the OMNI scale with cycle ergometer pictorial format can be used to estimate perceived exertion threshold (PETOMNI) and nonexhaustive PET (PETOMNI5-8) and to compare and to correlate these PET estimates with PETBorg, PETBorg14-17, and critical power (CP). During different days, 13 men performed 4 different high-inte...

Falls are one of the greatest concerns among the elderly. A number of studies have described peak torque as one of the best fall-related predictor. No studies have comprehensively focused on the rate of torque development of the lower limb muscles among elderly fallers. Then, the aim of this study was to determine the relationship between muscle pe...

The aim of this study was to investigate the effects of preferred and nonpreferred music on exercise distance, Heart Rate (HR), and Rating of Perceived Exertion (RPE) during continuous cycling exercise performed at high intensity. Fifteen participants performed five test sessions. During two sessions, they cycled with fixed workload on ergometer to...

The aim of this study was to investigate whether a 300-m shuttle run test predicts anaerobic capacity, expressed as mean power output in the Wingate test, in a group of professional soccer players. Twenty-one soccer players (21 ± 2 years; 76.8 ± 7.0 kg; 179.8 ± 6.7 cm) from a first division team of the São Paulo Soccer Federation participated in th...

Falls are one of the greatest concerns among the elderly. Among a number of strategies proposed to reduce the risk of falls, improving muscle strength has been applied as a successful preventive strategy. Although it has been suggested as a relevant strategy, no studies have analyzed how muscle strength improvements affect the gait pattern. The aim...

Full-text of this article is not available in this e-prints service. This article was originally published following peer-review in International Journal of Sports Medicine, published by and copyright Georg Thieme Verlag. The aim of this study was to test if the critical power model can be used to determine the critical rest interval (CRI) between...

Full-text of this article is not available in this e-prints service. This article was originally published following peer-review in International Journal of Sports Medicine, published by and copyright Georg Thieme Verlag. The aim of this study was to directly compare the causes of fatigue after a short- and a long-rest interval between consecutive...

http://dx.doi.org/10.5007/1980-0037.2009v11n1p88 The aim of this study was to investigate whether a 300-m shuttle run test predicts anaerobic capacity, expressed as mean power output in the Wingate test, in a group of professional soccer players. Twenty-one soccer players (21 ± 2 years; 76.8 ± 7.0 kg; 179.8 ± 6.7 cm) from a first division team of...

http://dx.doi.org/10.5007/1980-0037.2009v11n4p392 The aim of this study was to compare jump height and kinetic and kinematic com-ponents of countermovement vertical jumps between soccer and basketball players performed in two different arm swing conditions: with arm swing (WAS) and without arm swing (NAS). Nine basketball players (21.2 ± 2.9 years...

Aim. - This study aimed to test if investigate whether the anaerobic work capacity is replenished while exercising at critical power intensity. Then, a known exercise duration, which demands high anaerobic energy contribution, was compared to intermittent exercise duration with passive and active (cycling at critical power intensity) rest periods....

The purpose of this study was to determine a resting interval between countermovement jumps (i.e., volleyball spikes) that allows the maintenance of maximal jumping performance. Ten male volleyball players (1.85 +/- 0.05 m, 77.2 +/- 10.6 kg, 21.6 +/- 5.3 years) performed 6 experimental jumping sessions. In the first and sixth sessions, maximal coun...

http://dx.doi.org/10.5007/1980-0037.2008v10n1p56 The present study aimed to verify whether body somatotype was indicative of competitive success in female utsal (indoor soccer) players. One hundred and twelve players (22.1 ± 5.4 years; 58.4 ± 6.9 kg; 161.8 ± 6.2 cm), from ten teams and seven different states, had participated in a national competi...