Marcelo Sales
CNPq, Graduate Program of Physical Education, Graduate Student
Background: Physical exercise programs are typically composed of activities directed to the development of different physical abilities, usually stimulated in the same session. Objective: The aim of the study was to determine the effect... more
Background: Physical exercise programs are typically composed of activities directed to the development of different physical abilities, usually stimulated in the same session. Objective: The aim of the study was to determine the effect of one session of aerobic exercise at high intensity to 1% and 10% gradient on the height (HJump) and kinematics of the depth jump (PExc - eccentric, concentric phase PCon, and contact time – CT). Methods: Twenty-five moderately trained men (VO2Max 53.2 ± 4.3 mL.kg-1.min-1) attended five visits in the laboratory. Familiarity with the procedures in depth jump, VO2Max measures and their velocity associated (VVO2Max), and time to exhaustion performance (TLim) were performed at two initial visits. Results: On the three subsequent visits, the volunteers were subjected to three maximum depth jumps before and 10 min after the following conditions: (1) running intervals at high intensity of 10% gradient (R10%), (2) at 1% gradient (R1%), and control condition...
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Objetivou-se determinar a confiabilidade da medida angular (CMA) de agachamento profundo overhead (OHS) avaliado pela técnica de fotogrametria, determinando seu coeficiente de correlação intraclasse (CCI), bem como o respectivo erro... more
Objetivou-se determinar a confiabilidade da medida angular (CMA) de agachamento profundo overhead (OHS) avaliado pela técnica de fotogrametria, determinando seu coeficiente de correlação intraclasse (CCI), bem como o respectivo erro típico (ETM) absoluto e relativo da medida. 20 indivíduos idosos fisicamente ativos realizaram 2 visitas. No primeiro encontro foram realizados a avaliação antropométrica e uma familiarização com o movimento de OHS com as mãos acima da cabeça. Na segunda visita os participantes realizaram duas execuções consecutivas do movimento de OHS com as mãos acima da cabeça, onde seguravam um bastão. As medidas foram repetidas na mesma visita. Todos os idosos foram filmados por uma câmera com capacidade de 200 quadros por segundo. A consistência interna foi realizada via fotogramétrica, junto ao software Kinóvea® de análise angular bidimensional. A CMA foi determinada a partir de um CCI, bem com o ETM absoluto e relativo. As análises do CCI apresentaram excelente a...
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The immune system's response against SARS-Cov-2 seems crucial to control viral infection, since this system is homeostatic, dynamic and promotes immunoprotection of the organism through the activation of the innate and adaptive immune... more
The immune system's response against SARS-Cov-2 seems crucial to control viral infection, since this system is homeostatic, dynamic and promotes immunoprotection of the organism through the activation of the innate and adaptive immune system via activation of cellular and chemical complexes that recognize, neutralize, metabolize and eliminate heterologous substances, with or without tissue damage. An obesogenic microenvironment can further increase the risk of disease complications, and cause a more virulent viral strain and a more lethal virus. Moreover, physical inactivity as well as poor eating habits impairs the body's energy metabolism and immune cells due to low-grade chronic inflammation. Studies suggest that light to moderate exercise, as well as mild calorie restriction, as an effective approach to relieve obesity and therefore an interesting strategy to strengthen the immune response during the outbreak of COVID-19, while a vaccine is not developed. Some studies ha...
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Resistance exercise (RE) can be an excellent modality for glycemic control. Studies have demonstrated that a single RE session can reduce glycemia in subjects with or without diabetes. Little is known about the dose-response effect of RE... more
Resistance exercise (RE) can be an excellent modality for glycemic control. Studies have demonstrated that a single RE session can reduce glycemia in subjects with or without diabetes. Little is known about the dose-response effect of RE on glycemic control. This study aimed to investigate the acute metabolic responses after different RE protocols. Eighty-nine men were separated into six groups that completed RE protocols: two sets of 18 repetitions (2x18 at 50% of 1RM; n=19); three sets of 12 repetitions (3x12 at 70% of 1RM; n=14); four sets of nine repetitions (4x9 at 80% of 1RM; n=13); six sets of six repetitions (6x6 at 90% of 1RM; n=19); circuit (2x18 at 50% of 1RM; n=12); and a control session (n=12). Exercise sequence consisted of eight exercises. An oral glucose tolerance test was conducted with metabolic measurements immediately after each RE protocol, and every 15min until 120min of recovery. All groups exhibited significantly lower values (p<0.05) in the glucose area u...
Research Interests: Exercise Physiology, Skeletal muscle biology, Biomarkers, Medicine, Energy Metabolism, and 15 moreBiological Sciences, Exercise Science, Humans, Blood Glucose, Strength and Conditioning, Male, Resistance Training, ROC Curve, Time Factors, Muscle contraction, Glucose Tolerance Test, Lactic Acid, Area Under Curve, Predictive value of tests, and Medical and Health Sciences
The concept of anaerobic threshold (AT) was introduced during the nineteen sixties. Since then, several methods to identify the anaerobic threshold (AT) have been studied and suggested as novel 'thresholds' based upon the variable... more
The concept of anaerobic threshold (AT) was introduced during the nineteen sixties. Since then, several methods to identify the anaerobic threshold (AT) have been studied and suggested as novel 'thresholds' based upon the variable used to detect it (i.e. lactate threshold, ventilatory threshold). These different techniques have brought some confusion about how we should name this parameter, for instance, anaerobic threshold or the physiological measure used (i.e. lactate, ventilation). On the other hand, the modernization of scientific apparatus and methods, as well as the body of literature formed in the past decades, could provide a more cohesive understanding over the AT and the multiple physiological systems involved. Thus, the purpose of this review was to provide an integrative perspective of the methods to determine AT.
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The aim of this study was to investigate the effect of self-paced active recovery (AR) and passive recovery (PR) on blood lactate removal following a 200 m freestyle swimming trial. Fourteen young swimmers (with a training frequency of... more
The aim of this study was to investigate the effect of self-paced active recovery (AR) and passive recovery (PR) on blood lactate removal following a 200 m freestyle swimming trial. Fourteen young swimmers (with a training frequency of 6-8 sessions per week) performed two maximal 200 m freestyle trials followed by 15 minutes of different recovery methods, on separate days. Recovery was performed with 15 minutes of passive rest or 5 minutes of passive rest and 10 minutes of self-paced AR. Performance variables (trial velocity and time), recovery variables (distance covered and AR velocity), and physiological variables (blood lactate production, blood lactate removal, and removal velocity) were assessed and compared. There was no difference between trial times in both conditions (PR: 125.86±7.92 s; AR: 125.71±8.21 s; p=0.752). AR velocity was 69.10±3.02% of 200 m freestyle trial velocity in AR. Blood lactate production was not different between conditions (PR: 8.82±2.47 mmol L(-1); AR...
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O objetivo do presente estudo foi investigar a influencia da fadiga no equilíbrio do pé de apoio no momento do chute em jogadores de futebol. Participaram desta pesquisa 19 atletas de futebol divididos em dois grupos: grupo exaustão (GEX)... more
O objetivo do presente estudo foi investigar a influencia da fadiga no equilíbrio do pé de apoio no momento do chute em jogadores de futebol. Participaram desta pesquisa 19 atletas de futebol divididos em dois grupos: grupo exaustão (GEX) que realizou um esforço com carga incremental até a exaustão em esteira rolante, e o grupo controle (GCE) realizou um esforço leve-constante de forma continua em esteira rolante. Antes e após os protocolos foram avaliados parâmetros de equilíbrio estático em apoio unipodal, utilizando uma plataforma de força. O GEX apresentou aumento da área de deslocamento do centro de pressão (COP) (p < 0,05) após exaustão, tanto para o pé direito como para o esquerdo. A velocidade máxima de deslocamento do centro de pressão ântero-posterior da perna direita do GEX aumentou significantemente (p < 0,05) após a exaustão em relação aos valores de repouso. A fadiga pode diminuir a capacidade de equilíbrio do pé de apoio em jogadores de futebol. Principalmente n...
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OBJETIVO: Analisar a possibilidade de se determinar a velocidade de lactato mínimo (LM) em corredores adolescentes utilizando-se apenas três estágios incrementais. MÉTODOS: Onze indivíduos (13,7 ± 1,0 anos; 47,3 ± 12,1kg; 160,0 ± 1,0cm;... more
OBJETIVO: Analisar a possibilidade de se determinar a velocidade de lactato mínimo (LM) em corredores adolescentes utilizando-se apenas três estágios incrementais. MÉTODOS: Onze indivíduos (13,7 ± 1,0 anos; 47,3 ± 12,1kg; 160,0 ± 1,0cm; 18,3 ± 1,8kg/m²) realizaram três testes de corrida em pista de atletismo em dias distintos: 1) desempenho de 3.000m (Vm3.000); 2) teste de LM que consistiu de um sprint de 500m para indução a hiperlactatemia, seguido de 10min de recuperação e seis séries de 800m em intensidades de 83, 86, 89, 92, 95 e 98% da Vm3.000; 3) teste de LM com três estágios (LMp3) semelhante ao protocolo anterior, porém, com três séries de 800m em intensidades de 83, 89 e 98% da Vm3.000. Durante o primeiro minuto de recuperação entre os estágios dos testes dois e três foram coletadas amostras de sangue para dosagem de lactato sanguíneo. Para determinação do LM foram empregadas: a) inspeção visual (LM) e b) função polinomial de segunda ordem para identificar o LM em seis está...
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Objetivo: Analisar a adição de exercícios resistidos em treino aeróbio na hipotensão pós-exercício (HPE). Métodos: Nove normotensos, do sexo masculino, entre 20 e 35 anos de idade, participaram do estudo realizando duas sessões... more
Objetivo: Analisar a adição de exercícios resistidos em treino aeróbio na hipotensão pós-exercício (HPE). Métodos: Nove normotensos, do sexo masculino, entre 20 e 35 anos de idade, participaram do estudo realizando duas sessões experimentais em cicloergômetro: (1) exercício aeróbio em cicloergômetro (62% e 68% da frequência cardíaca [FC] de reserva) (S1); (2) treino igual ao da S1, porém com incremento de flexão de cotovelo (S2). Ambas as sessões tiveram duração de 20 minutos. Resultados: A pressão arterial sistólica na S2 (repouso = 122,6 ± 2,7 – 30 recuperação = 108,8 ± 2,2 – 45 recuperação = 110,8 ± 2,4 mmHg e 60 recuperação = 107,3 ± 7,3) apresentou HPE por tempo mais prolongado que S1 (repouso = 121,7 ± 3,9 – 15 recuperação = 112,2 ± 2,8 – 30 recuperação = 108,1 ± 2,8 mmHg). Conclusão: Os resultados sugerem que a duração da HPE parece ser dependente da quantidade de unidades motoras envolvidas.
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A positive affective experience, making exercise more pleasurable, less stressful, achieving greater satisfaction and intrinsic motivation experience through resistance training may be accomplished by performing self-selected exercises.... more
A positive affective experience, making exercise more pleasurable, less stressful, achieving greater satisfaction and intrinsic motivation experience through resistance training may be accomplished by performing self-selected exercises. These exercises can also lead to other Research, Society and Development, v. 9, n. 11, e1889119755, 2020 (CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i11.9755 3 health-related and performance outcomes. Thus, this study aimed to analyze the effects of a short-term self-selected resistance training on levels of anxiety and depression in sedentary individuals. Twenty-one individuals, aged between 20 and 50 years, were assigned to Training Group (TG) and Control Group (CG). The TG underwent 4 weeks of resistance training, 2 sessions per week, with self-selected intensities. Anxiety and depression scores were collected before and after intervention using the Hospital Anxiety and Depression Scale (HAD). The results showed that the T...
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We aimed to determine which discipline had the greater performance improvements in the history of Ironman triathlon in Hawaii and also which discipline had the greater influence in overall race time. Data from 1983 to 2018 of the top... more
We aimed to determine which discipline had the greater performance improvements in the history of Ironman triathlon in Hawaii and also which discipline had the greater influence in overall race time. Data from 1983 to 2018 of the top three women and men of each year who competed in the Ironman World Championship were included. In addition to exploratory data analyses, linear regressions between split times and years of achievement were performed. Further, a stepwise multiple linear regression was applied using total race time as the dependent variable and split times as the independent variables. Both women and men significantly improved their performances from 1983 to 2018 in the Ironman World Championship. Swimming had the largest difference in improvements between men and women (3.0% versus 12.1%, respectively). A negative and significant decrease in each discipline was identified for both women and men, with cycling being the discipline with the greatest reduction. The results f...
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For any triathlon distance (short, Olympic, half-distance and full-distance), competitors spend more time cycling than swimming or running, but running has emerged as the discipline with the greatest influence on overall performance at... more
For any triathlon distance (short, Olympic, half-distance and full-distance), competitors spend more time cycling than swimming or running, but running has emerged as the discipline with the greatest influence on overall performance at the Olympic distance. However, there is a lack of evidence on which discipline has the greatest influence on performance in the overall full-distance triathlon (3.8 km swimming/180 km cycling/42.195 km running), especially for the fastest performing athletes of all time. The total race times of 51 fastest triathletes (sub-8-hour) were studied, while for the split times, a sample of 44 participants was considered. The discipline that seemed to better predict total race time was cycling (coefficient = 0.828; p < 0.001), followed by running (coefficient = 0.726; p < 0.001) and swimming (coefficient = 0.476; p < 0.001). Furthermore, cycling was the discipline with the highest performance improvement over the years, whereas running had a slightly ...
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As one of the most popular sport modalities in Brazil, and with an exponential growth in Europe, futsal is characterized by intermittent stimulus of anaerobic high intensity sprints. The running-based anaerobic sprint test (RAST) is one... more
As one of the most popular sport modalities in Brazil, and with an exponential growth in Europe, futsal is characterized by intermittent stimulus of anaerobic high intensity sprints. The running-based anaerobic sprint test (RAST) is one of the most common tests to assess anaerobic power in futsal athletes, however, it presents both time and physical challenges. Therefore, we aimed to correlate RAST with a simpler test, the vertical jump (VJ), in teenage male futsal athletes; Methods: Thirteen volunteers were enrolled and underwent two visits to the laboratory, one for the VJ and the other for the RAST in a randomized order; Results: The association test indicates a strong and significant correlation between VJ and RAST. We conclude that VJ can be used as an alternative to RAST in teenage male futsal athletes.
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Type 2 Diabetes Elicits Lower Nitric Oxide, Bradykinin Concentration and Kallikrein Activity Together with Higher DesArg 9 -BK and Reduced Post-Exercise Hypotension Compared to Non-Diabetic Condition) Type 2 Diabetes Elicits Lower Nitric Oxide, Bradykinin Concentration and Kallikrein Activity Tog...more
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O objetivo do presente estudo foi comparar as frequências de nível de atividade física entre meninos e meninas, bem como comparar a adiposidade corporal desses grupos em uma amostra de escolares de Boa Vista – Roraima. Para tanto, 150... more
O objetivo do presente estudo foi comparar as frequências de nível de atividade física entre meninos e meninas, bem como comparar a adiposidade corporal desses grupos em uma amostra de escolares de Boa Vista – Roraima. Para tanto, 150 escolares, sendo 73 meninos (14,4 ± 1,3 anos de idade) e 77 meninas (13,9 ± 1,3 anos de idade) (Power = 95%), do ensino fundamental de uma escola pública da zona oeste de Boa Vista – Roraima foram submetidos à mensuração de massa corporal e estatura, para posterior cálculo do índice de massa corporal (IMC) e percentual de gordura corporal (%GC). O nível de atividade física foi verificado por meio do IPAQ, versão curta, tendo como referência a última semana. Não houve prevalência (p>0,05) de alunos ativos (meninos=64,4% e meninas=59,7%) sobre os sedentários (meninos=35,6% e meninas=40,3%). Não houve diferença (p>0,05) do IMC entre meninos (20,3 ± 3,3 kg.m-2) e meninas (20,3 ± 3,3 kg.m-2). Entretanto, as meninas apresentaram o %GC (22,24 ± 5,0) mai...
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A psicomotricidade é uma ferramenta utilizada pela educação física na educação infantil, pois tem como objetivo colaborar no desenvolvimento da criança em seus aspectos motores, cognitivos e afetivos sociais. Esse desenvolvimento ocorre... more
A psicomotricidade é uma ferramenta utilizada pela educação física na educação infantil, pois tem como objetivo colaborar no desenvolvimento da criança em seus aspectos motores, cognitivos e afetivos sociais. Esse desenvolvimento ocorre de maneira gradativa ao longo do seu crescimento e de sua capacidade de se adaptar as necessidades básicas. Quando trabalhada no contexto escolar, as atividades psicomotoras auxiliam no processo de aprendizagem. Através da psicomotricidade é possível desenvolver adequadamente todos os elementos psicomotores, são eles: coordenação motora ampla, coordenação motora fina, lateralidade, equilíbrio, estruturação espacial, orientação temporal, ritmo e esquema corporal. Deste modo, a psicomotricidade precisa ser trabalhada nas aulas de educação física na educação infantil para contribuir na formação integral e harmoniosa da criança.
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Introdução: atletas de lutas comumente recorrem a estratégias de perda rápida de peso antes da competição com intuito de competir em categorias inferiores. Dessa forma, buscam se beneficiar reduzindo seu peso antes da pesagem oficial e... more
Introdução: atletas de lutas comumente recorrem a estratégias de perda rápida de peso antes da competição com intuito de competir em categorias inferiores. Dessa forma, buscam se beneficiar reduzindo seu peso antes da pesagem oficial e tentando recuperá-la em curto período de tempo entre a pesagem e a luta. Entretanto, essa prática pode ser perigosa sem o devido acompanhamento profissional. Objetivo: o objetivo do presente estudo foi investigar a prevalência de atletas de judô que utilizam métodos de perda de peso no período pré-competitivo, bem como quais são as estratégias utilizadas para perda de peso e qual é a percepção dos atletas em relação a esse procedimento. Materiais e Métodos: 33 judocas competidores de nível nacional (24,5 ± 4,6 kg.m-2) responderam um questionário com perguntas referentes à utilização ou não de métodos de perda de peso e, quais são as estratégias de perda de peso frequentemente utilizada no período pré-competitivo. Resultados: 93% utilizam métodos de pe...
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In order to investigate the validity of critical velocity (CV) as a noninvasive method to estimate the lactate minimum velocity (LMV), 25 youth runners underwent the following tests: 1) 3,000m running; 2) 1,600m running; 3) LMV test. The... more
In order to investigate the validity of critical velocity (CV) as a noninvasive method to estimate the lactate minimum velocity (LMV), 25 youth runners underwent the following tests: 1) 3,000m running; 2) 1,600m running; 3) LMV test. The intensity of lactate minimum was defined as the velocity corresponding to the lowest blood lactate concentration during the LMV test. The CV was determined using the linear model, defined by the inclination of the regression line between distance and duration in the running tests of 1,600 and 3,000m. There was no significant difference (p=0.3055) between LMV and CV. In addition, both protocols presented a good agreement based on the small difference between means and the narrow levels of agreement, as well as a standard error of estimation classified as ideal. In conclusion, CV, as identified in this study, may be an alternative for noninvasive identification of LMV.
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The literature has shown the efficiency of exercise in the control of type 2 diabetes (T2D), being suggested as one of the best kinds of non-pharmacological treatments for its population. Thus, the scientific production related to this... more
The literature has shown the efficiency of exercise in the control of type 2 diabetes (T2D), being suggested as one of the best kinds of non-pharmacological treatments for its population. Thus, the scientific production related to this phenomenon has growing exponentially. However, despite its advances, still there is a lack of studies that have carried out a review on the acute effects of physical exercise on metabolic and hemodynamic markers and possible control mechanisms of these indicators in individuals with T2D, not to mention that in a related way, these themes have been very little studied today. Therefore, the aim of this study was to organize and analyze the current scientific production about the acute effects of physical exercise on metabolic and hemodynamic markers and possible control mechanisms of these indicators in T2D individuals. For such, a research with the following keywords was performed: -exercise; diabetes and post-exercise hypotension; diabetes and excess ...
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The purposes of this study were to analyze and compare the effects of exercise performed in different intensities, above and below lactate threshold (LT) on post-exercise blood pressure (BP) and nitric oxide (NO) responses in individuals... more
The purposes of this study were to analyze and compare the effects of exercise performed in different intensities, above and below lactate threshold (LT) on post-exercise blood pressure (BP) and nitric oxide (NO) responses in individuals with type 2 diabetes (T2D). For this, 11 T2D underwent the following sessions: 1) control session; 2) 20-min of moderate cycling (80% LT); and 3) 20-min of high intensity cycling (120%LT) on a cycle ergometer. Plasma NO and BP measurements were carried out at rest and at 15 and 45 min of post-sessions. When compared to rest, only the exercise session performed at 120%LT elicited an increase of NO (from 7.2 to 9.5 µM, p<0.05), as well as a decrease in systolic BP (from 126.6±7.9 to 118.7±3.9 mmHg, p<0.05) during the post-exercise period. In conclusion, the results suggest that NO release and post-exercise BP decrease are intensity-dependent for individuals with T2D.
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O envelhecimento provoca uma diminuição na concentração de serotonina, que por sua vez, pode produzir anormalidades de comportamento como: agressividade, insônia, comportamento suicida ou criminal e perda do desejo sexual. Entretanto,... more
O envelhecimento provoca uma diminuição na concentração de serotonina, que por sua vez, pode produzir anormalidades de comportamento como: agressividade, insônia, comportamento suicida ou criminal e perda do desejo sexual. Entretanto, estudos demonstram que o exercício aeróbio parece aumentar agudamente as concentrações de triptofano e serotonina. Por outro lado, não há relatos na literatura de estudos que tenham investigado os efeitos de diferentes intensidades e volumes de exercício aeróbio sobre as concentrações de triptofano e serotonina em mulheres idosas. O objetivo do presente estudo foi verificar os efeitos agudos de diferentes intensidades e volumes de exercício aeróbio sobre as concentrações de triptofano e serotonina em mulheres idosas fisicamente ativas. Para tanto, 49 mulheres idosas (idade entre 60 e 75 anos), fisicamente ativas, foram distribuídas em seis grupos: controle (GC; n = 8) e cinco experimentais: 1) exercício aeróbio realizado a 90% do limiar ventilatório (L...
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Background The absence of the I allele of the angiotensin converting enzyme (ACE) gene has been associated with higher levels of circulating ACE, lower nitric oxide (NO) release and hypertension. The purposes of this study were to analyze... more
Background The absence of the I allele of the angiotensin converting enzyme (ACE) gene has been associated with higher levels of circulating ACE, lower nitric oxide (NO) release and hypertension. The purposes of this study were to analyze the post-exercise salivary nitrite (NO2 -) and blood pressure (BP) responses to different exercise intensities in elderly women divided according to their ACE genotype. Methods Participants (n = 30; II/ID = 20 and DD = 10) underwent three experimental sessions: incremental test - IT (15 watts workload increase/3 min) until exhaustion; 20 min exercise 90% anaerobic threshold (90% AT); and 20 min control session without exercise. Volunteers had their BP and NO2 - measured before and after experimental sessions. Results Despite both intensities showed protective effect on preventing the increase of BP during post-exercise recovery compared to control, post-exercise hypotension and increased NO2 - release was observed only for carriers of the I allele ...
Research Interests: Medicine, Humans, Internal Medicine, Hypertension, Blood Pressure, and 15 moreNitric oxide, Female, Exercise, Aged, Middle Aged, Saliva, Genotype, Anaerobic Exercise, Exercise Test, Exercícios Físicos, Nitrites, alleles, Cardiovascular medicine and haematology, physical exertion, and Pressão Arterial
... Yit Aun Lim, PhD. Lonnie Lowery, PhD. Derek Marks, PhD. Cristine Mermier, PhD. Robert Robergs, PhD. Chantal Vella, PhD. Dale Wagner, PhD. Frank Wyatt, PhD. Ben Zhou, PhD. ... The authors submitted volunteers to a 6-month aerobic... more
... Yit Aun Lim, PhD. Lonnie Lowery, PhD. Derek Marks, PhD. Cristine Mermier, PhD. Robert Robergs, PhD. Chantal Vella, PhD. Dale Wagner, PhD. Frank Wyatt, PhD. Ben Zhou, PhD. ... The authors submitted volunteers to a 6-month aerobic training program at 70% of VO 2 max. ...
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Research Interests: Cognitive Science, Cardiology, Atherosclerosis, Humans, Internal Medicine, and 15 moreAge, Hypertension, Blood Pressure, Female, Exercise, Endothelial dysfunction, Clinical Sciences, Aged, Electrophoresis, Anaerobic Exercise, Exercise Test, Biological Fluids, Aerobic Exercise, Anaerobic Threshold, and Exercise intensity
ABSTRACT O objetivo deste estudo foi desenvolver e validar uma equação de estimativa do percentual de gordura corporal (%GC) por meio do teste de espessura de dobras cutâneas (DC) a partir dos valores do índice de massa corporal (IMC) em... more
ABSTRACT O objetivo deste estudo foi desenvolver e validar uma equação de estimativa do percentual de gordura corporal (%GC) por meio do teste de espessura de dobras cutâneas (DC) a partir dos valores do índice de massa corporal (IMC) em mulheres adultas brasileiras. Para tanto, 70 mulheres (poder estatístico de 80%) entre 20 e 60 anos foram submetidas às medidas do IMC e %GC calculado pela técnica de espessura de DC. Após a realização das medidas de composição corporal, a amostra foi aleatoriamente dividida em dois grupos pareados antropometricamente (G1, n=35 e G2, n=35). A partir dos valores obtidos pelas medidas utilizadas para o cálculo do IMC e do %GC calculado pela técnica de DC no G1, foi aplicada uma regressão linear entre essas duas variáveis a fim de elaborar uma equação de predição em função do IMC [%GC= 1,0725*IMC (kg.m 2(-1))+6,6088]. Não se observou diferença significativa (p=0,972) entre o %GC calculado pela técnica de DC (36,9±5,5 %) do G1 e %GC estimado pela equação proposta (36,9±4,7 %) do G2, com boa correlação (r=0,66; p=0,001) e concordância [0,0 (8,5) %GC] entre eles. Além disso, o tamanho do efeito das comparações foi considerado pequeno (d=0,01), bem como erro padrão da estimativa classificado como bom (3,5%). Concluímos que a equação proposta se mostrou válida em estimar o %GC calculado pela técnica de DC em mulheres adultas brasileiras.
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Background: Worldwide, systemic arterial hypertension is a leading cause of death and non-communicable cardiovascular disease. A major factor contributing to this disease is a sedentary lifestyle. However, physical exercise, such as... more
Background: Worldwide, systemic arterial hypertension is a leading cause of death and non-communicable cardiovascular disease. A major factor contributing to this disease is a sedentary lifestyle. However, physical exercise, such as martial arts, may be an option for blood pressure (BP) control. The magnitude of post-exercise hypotension is associated with a prolonged decrease in BP in normotensive and hypertensive individuals. Objectives: The present study aimed to verify the effects of a Contact Karate (CK) session on BP responses during a post-exercise recovery period in young adults.
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Introduction: Motor development is associated with many physical, emotional and cognitive factors of children and virtual environments, such as active video games, maybe an innovative and motivating alternative. Objective: The aim of this... more
Introduction: Motor development is associated with many physical, emotional and cognitive factors of children and virtual environments, such as active video games, maybe an innovative and motivating alternative. Objective: The aim of this study was to investigate the effects of a five-day of table tennis training in virtual environment on the performance of serve of in real space. Material and Method: Two groups (experimental and control) with children aged 9.32±0.6 years old participated in the study. The experimental group practiced the serve of table tennis in the active videogame daily for five days. After the intervention, all volunteers underwent a test in the traditional table and, and were verified the amount of hits each child. Results: no significant differences (p>0.05) in the amount of hits between the groups were found, as well as a low magnitude of the effect of the difference. Conclusions: The results suggest that short-term training of table tennis in active videogame does not seem to improve performance in the serve of children.