Introduction: Combat sports have increasing popularity, which has been accompanied by high academ... more Introduction: Combat sports have increasing popularity, which has been accompanied by high academic-scientific interest. In judo, the focus on technical-tactical elements of the fight can contribute to identify determinants of performance. Objective: To describe and examine the inter-intra linear correlation of morpho functional variables with technical-tactical performance components of judo. Methods: Cross-sectional and observational study, with convenience sample, involving twelve male athletes (21.25 ± 5.04 years). Anthropometric measurements were performed and handgrip strength (HGS), thoracolumbar and leg flexibility (TLLF) were evaluated and body mass index (BMI) was calculated. The technical-tactical performance was examined by the analysis of time-movement from the athletes’ filming during real combat competition situations. Normality in data distribution was tested by Shapiro Wilk. The distribution of the types of blow was analyzed by ANOVA followed by Turkey test. Pearson...
A adolescencia e a fase compreendida dos 10 aos 19 anos de idade, e o segundo periodo em que o cr... more A adolescencia e a fase compreendida dos 10 aos 19 anos de idade, e o segundo periodo em que o crescimento tem sua velocidade maxima. Atletas adolescentes, em funcao da demanda energetica, podem apresentar erros alimentares importantes. O objetivo deste estudo foi avaliar a adequacao e a qualidade da dieta de adolescentes jogadores de futsal das categorias sub 13, sub 15 e sub 17 de um clube esportivo antes e depois de intervencao nutricional para uma alimentacao saudavel. Foi realizada uma intervencao nutricional durante os meses de marco a maio de 2015 com adolescentes da equipe de futsal de um clube esportivo da cidade de Pelotas/RS, que consistiu em orientacoes para habitos alimentares mais saudaveis, utilizando como parâmetro os Dez Passos da Alimentacao Saudavel para Adolescentes do Ministerio da Saude. O estado nutricional e o consumo alimentar foram avaliados antes e apos a intervencao, com um intervalo de oito semanas entre os encontros. Participaram do estudo 32 adolescent...
Objective: To investigate the effects of the addition of a specific high-intensity intermittent t... more Objective: To investigate the effects of the addition of a specific high-intensity intermittent training (HIIT) protocol to the habitual training on the physical fitness of amateur wushu sanda athletes. Methods: This is an experimental study in which 6 amateur regional level wushu sanda athletes (24.6±6.4 yrs, 1.70±0.1m height, and 71.3±7.3kg weight) underwent a 2 session/week training program for 4 weeks. The HIIT specific protocol was composed of 3 rounds of 2 minutes with 1-minute intervals in between, simulating a match duration. Each round was divided into 8 blocks of 15 seconds. Each block was composed of 5 seconds of high-intensity activities, 5 seconds of low-intensity activities and 5 seconds of pause. Countermovement jump, squat jump, horizontal jump, aerobic fitness (TKDtest) and kick speed test (FSOK) were applied. Results: Athletes presented performance increases in countermovement jump (from 41±5.7 to 47.3±7.3cm, p=0.007, g=0.88), horizontal jump (from 1.7±0.4 to 2.3±0...
Background and Study Aim: In Brazilian Jiu-Jitsu (BJJ) competitions are based in two models accor... more Background and Study Aim: In Brazilian Jiu-Jitsu (BJJ) competitions are based in two models accordingly to permitted clothing. The aim of this study was knowledge about physical and physiological responses, as well as the time-motion structure and technical-tactical actions induced by gi (traditional uniform) and nogi (where “gi” it is not permitted) simulated combats. Material and Methods: Twelve male athletes (age: 23 ±5 years, body mass: 81 ±8 kg, time of practice: 8 ±2 years) in two different conditions of simulated combats (gi and nogi). Blood lactate, heart rate, lower limbs power, strength and endurance handgrip were collected to asses physical and physiological demands. Additionally, technical-tactical and time-motion was analysed. Results: Considering the physiological responses showed significant differences between moments (p<0.001), but not between conditions (p = 0.14 for heart rate, and p = 0.57 for blood lactate). For technical-tactical variables, differences betwe...
The novel coronavirus disease (COVID-19) has emerged at the end of 2019 and caused a global pande... more The novel coronavirus disease (COVID-19) has emerged at the end of 2019 and caused a global pandemic. The disease predominantly affects the respiratory system; however, there is evidence that it is a multisystem disease that also impacts the cardiovascular system. Although the long-term consequences of COVID-19 are not well-known, evidence from similar diseases alerts for the possibility of long-term impaired physical function and reduced quality of life, especially in those requiring critical care. Therefore, rehabilitation strategies are needed to improve outcomes in COVID-19 survivors. Among the possible strategies, resistance training (RT) might be particularly interesting, since it has been shown to increase functional capacity both in acute and chronic respiratory conditions and in cardiac patients. The present article aims to propose evidence-based and practical suggestions for RT prescription for people who have been diagnosed with COVID-19 with a special focus on immune, re...
ABSTRACT Objective This investigation aimed to compare acute and delayed biochemical, hematologic... more ABSTRACT Objective This investigation aimed to compare acute and delayed biochemical, hematological, and neuromuscular responses to the Rest-pause (RP) method and traditional resistance training (TRT) through 48 h. Methods This crossover design study, in which the training sessions were separated by a 7-days washout interval. Twelve recreationally trained males (age: 22.4 ± 1.8 years) realized the RP protocol, consisting of two sets of 6-3-3 repetitions at 90% of 6-repetition maximum (6RM) and 20 s of rest between repetitions and 2:30 min between sets and TRT protocol, consistent of 3 sets of 8 repetitions at 85% of 6RM with 2 min between sets. Blood analyses and neuromuscular performance were measured before (PRE), immediately after (POST) and 24 (24H) and, 48 h (48H) after protocols. Results Regarding between-moments comparisons, biochemical and hematological responses increased after protocols (p < 0.05) and returned the baseline values after 24H (p > 0.05). Only creatine kinase, aspartate aminotransferase, neutrophiles, and white blood cells increased after protocols (p < 0.05) and returned to baseline values after 48H (p > 0.05). No significant difference between moments was found for neuromuscular performance (p > 0.05). Regarding difference between groups, red blood cells and hemoglobin showed lower values for the RP in comparison to the TRT after 24H (p = 0.03). Conclusion The sets configurations seem to be insufficient to induce an additional effect in muscle damage markers, immune responses, and neuromuscular performance. Finally, it seems that advanced techniques with lower volume don’t affect the immune system for long time periods.
Aerobic exercise is traditionally recommended to improve general health and prevent many non-comm... more Aerobic exercise is traditionally recommended to improve general health and prevent many non-communicable diseases. However, the measures adopted to control the novel Coronavirus (COVID-19) outbreak culminated with closing of exercise facilities and fitness centers and, as a primary consequence, impaired aerobic exercise practice. This contributed to an increase in risk factors associated with physical inactivity such as insulin resistance, high blood pressure, low-grade inflammation, weight gain, and mental health problems. The scenario is worrisome, and it is important to propose alternatives for exercise practice during the COVID-19 pandemic. Interval training (IT) emerges as an exercise mode that might be feasible, low-cost, and potentially safe to be performed in many different places. IT consists of interspersing relative brief bouts of high-intensity exercise with recovery periods and promotes similar or greater health benefits when compared to moderate-intensity continuous e...
Background One of the most popular high-intensity interval exercises is the called “Tabata Protoc... more Background One of the most popular high-intensity interval exercises is the called “Tabata Protocol”. However, most investigations have limitations in describing the work intensity, and this fact appears to be due to the protocol unfeasibility. Furthermore, the physiological demands and energetic contribution during this kind of exercise remain unclear. Methods Eight physically active students (21.8 ± 3.7 years) and eight well-trained cycling athletes (27.8 ± 6.4 years) were enrolled. In the first visit, we collected descriptive data and the peak power output (PPO). On the next three visits, in random order, participants performed interval training with the same time structure (effort:rest 20s:10s) but using different intensities (115%, 130%, and 170% of PPO). We collected the number of sprints, power output, oxygen consumption, blood lactate, and heart rate. Results The analysis of variance for multivariate test (number of sprints, power output, blood lactate, peak heart rate and p...
International Journal of Sports Physiology and Performance
Background: Jumps are important evaluation tools for muscle strength and power and for interlimb ... more Background: Jumps are important evaluation tools for muscle strength and power and for interlimb asymmetries. Different jump tests are well related to athletic performance, prediction of injury risk, and common motor gestures of several sports such as soccer. Low-cost mobile applications (apps) have gained popularity for this measure. The authors hypothesized that the My Jump 2 app would be a valid tool to assess drop-jump performance and interlimb asymmetry in soccer players. Methods: Eleven male soccer players took part in this study (18.2 [1.3] y, 69.9 [9.5] kg, 174 [6.6] cm). The athletes performed each test twice on a force plate (gold-standard method), while the jumps were recorded through the mobile app. Measures with the My Jump 2 app were applied by 2 evaluators, independently and in duplicate (interrater and intrarater reliability). The agreement analysis between both evaluations was done using an intraclass correlation coefficient and Bland–Altman plots. Results: Compared...
Tissues usually super compensate during the period that follow physical exercise. Although this i... more Tissues usually super compensate during the period that follow physical exercise. Although this is widely accepted for muscle and glycogen, the compensatory effect is not usually applied to fat tissues. Notwithstanding, evidence for this has been present since the 1970s when it was first suggested that the increased lipogenic activity in response to training might be an adaptation that enables to restore an energy reserve that can be used in times of need. In this context, the present review aimed to summarize information about the effect of detraining on fat metabolism and the physiological responses associated with fat regain. A systematic search on PubMed and Scielo was performed using “training cessation,” “detraining,” “exercise detraining,” and “exercise cessation” combined with “fat tissue,” “adipose tissue,” “adipose metabolism,” and “fat metabolism,” as descriptors. From 377 results, 25 were included in this review, 12 humans and 13 rodents, resulting in a sample of 6772 hu...
Revista Brasileira de Cineantropometria & Desempenho Humano
The purpose of this investigation was to measure anthropometric and physical performance variable... more The purpose of this investigation was to measure anthropometric and physical performance variables of TKD athletes from the city of Pelotas - RS. Forty-five athletes aged 16.4 ± 5.2 years and time of practice of 3.25 ± 3.6 years were evaluated. Athletes performed anthropometric evaluation and physical, general and specific performance tests. In the sum of seven skin folds, men presented lower values ??(106.1 ± 49.5 mm versus 143.4 ± 43.2 mm, p <0.002). Male seniors presented better performance in the vertical jump compared to beginners (42.3 ± 8.5cm versus 24.8 ± 10.1cm, p <0.03) and to women (22.1 ± 4.3cm, p <0.03). Graduated individuals perform higher number of arm pushups than beginners and women and more repetitions in the abdominal test. Male junior and senior athletes had higher isometric handgrip strength than females (48.3 ± 3.9 kgf and 38.1 ± 12.6 kgf versus 29 ± 5.6 kgf, p <0.001). Men covered longer distance in the yo-yo test than women (606.6 ± 233.8m versus ...
Revista de Educação Física / Journal of Physical Education
Introdução: O Campo Operacional de Instrução (COI) demanda elevado esforço físico e mental.Objeti... more Introdução: O Campo Operacional de Instrução (COI) demanda elevado esforço físico e mental.Objetivo: Avaliar os efeitos das atividades de treinamento militar sobre indicadores de dano muscular periférico, de controle autonômico e de aptidão física em alunos do Núcleo de Preparação de Oficiais da Reserva (NPOR) de Pelotas.Métodos: Este estudo longitudinal, avaliou 18 alunos do curso de formação do NPOR, antes e após uma semana de atividade em COI com exercícios físicos intensos. Mensuraram-se a concentração sanguínea de creatina quinase [CK], os indicadores da variabilidade da frequência cardíaca (VFC) e o desempenho dos participantes em testes de aptidão física. O teste de Shapiro-Wilk foi utilizado para avaliar a normalidade dos dados e os momentos foram comparados com teste t de Student para amostras dependentes e as correlações testadas com a prova de Pearson. O nível de confiança das análises foi de 95%.Resultados: A potência de membros superiores e inferiores diminuiu (p<0,0...
To compare two different randori structure (high volume and short pauses-TRAD training vs low vol... more To compare two different randori structure (high volume and short pauses-TRAD training vs low volume with long pauses-COMP training) in the neuromuscular and metabolic responses of elite judo athletes. Methods: The first situation (TRAD) consisted of 12 randoris of 5 minutes with 45 seconds rest, and the other situation (COMP), consisted of 6 randoris of 5 minutes with 10 minutes between them. Physiological (Blood Lactate and Creatine Kinase), neuromuscular (Countermovement Jump and Medicine Ball Throws) and perceptive variables (Rating Perceived Exertion) were measured before and at the end of the sessions. Results: The subjective perception of effort at the end of the training was significantly higher in the TRAD training type (TRADpost: 8.1 ± 0.9 AU; COMPpost: 6.6 ± 1.5 AU, p <0.001). Blood lactate concentration (TRADpost: 6.4 ± 2.2 mmol/L; COMPpost: 8.1 ± 2.9 mmol/L; p <0.001), CMJ height (TRADpost: 36.2 ± 4.6 cm; COMPpost: 35.9 ± 4.3 cm, p = 0.012) and upper limb power performance (TRADpost: 6.4 ± 0.9 m; COMPpost: 6.3 ± 0.9 m p = 0.03) were significantly higher at the end of the two training sessions compared to their start, but there are no group effect. There is group effect in CK (TRADpost: 490.7 ± 273.5 U\L; COMPpost: 357.4 ± 203.8 U\L; p <0.001). Conclusions: This study demonstrated that TRAD and COMP Judo training induced similar physical demands, and both seem to not be enough to reach higher intensities, which made them distant methods of competitive reality.
High-intensity activity is an important aspect of football performance during competitive match p... more High-intensity activity is an important aspect of football performance during competitive match play. The aim of this study was to investigate the effect of beta-alanine supplementation throughout a short-duration intense football-specific training period prior to an international competition on measures of high-intensity running performance. Methods: Twenty-four elite international U20 female footballers (age 18 ± 1 y, height 1.67 ± 0.07 m, body mass 62.7 ± 7.4 kg) volunteered to perform the YoYo Intermittent Recovery Test Level 1 (YoYo IR1), the Running Anaerobic Sprint Test (RAST) and a 20-m maximal sprint test on two separate occasions, separated by 3 weeks of training and supplementation. Participants were randomly assigned to receive either 6.4 g•day −1 sustained-release beta-alanine (BA, N = 12) or an equivalent dose of maltodextrin (placebo, PL, N = 12) throughout a 3-week standardized training camp. Results: There was a main effect of group (P = 0.05) and time (P = 0.004) on YoYo IR1; overall values were lower in PL and distance covered was lower post-vs. presupplementation. There was no group × time interaction (P = 0.07). There was an effect of sprint number for RAST, but no further main effects and there were no effect for the 20-m sprint. Conclusions: Top-level female footballers involved in this intense 3-week training period prior to a competition worsened their high-intensity intermittent exercise capacity, and this negative result was not attenuated by a short-duration BA supplementation protocol throughout the same period. Further work is necessary to elucidate whether adapted training protocols and BA dosing regimens could lead to better results.
The study compared the effects of resistance training programs composed by multi-joint (MJ), sing... more The study compared the effects of resistance training programs composed by multi-joint (MJ), single-joint (SJ) and the combination of multi- and single-joint (MJ+SJ) exercises on muscle strength and hypertrophy in trained women. Thirty participants were divided into groups that performed only MJ exercises, SJ exercises and MJ+SJ exercises for six months. Participants were tested for 1-repetition maximum (RM) and muscle thickness (MT) before and after the intervention. All groups showed significant gains on 1RM tests from pre- to post-training (P<0.01). However, MJ and MJ+SJ groups obtained greater gains in 1RM for the MJ exercises in comparison with the SJ group. Increases in 1RM for the SJ exercises were similar among groups, with the exception of leg curl, where the SJ group obtained greater gains than MJ and MJ+SJ. All groups obtained significant increases in MT from pre- to post-training for all muscle groups. However, MJ and MJ+SJ groups presented greater increases in gluteu...
Strategies aiming to promote weight loss usually include anything that results in an increase in ... more Strategies aiming to promote weight loss usually include anything that results in an increase in energy expenditure (exercise) or a decrease in energy intake (diet). However, the probability of losing weight is low and the probability of sustained weight loss is even lower. Herein, we bring some questions and suggestions about the topic, with a focus on exercise interventions. Based on the current evidence, we should look at how metabolism changes in response to interventions instead of counting calories, so we can choose more efficient models that can account for the complexity of human organisms. In this regard, high-intensity training might be particularly interesting as a strategy to promote fat loss since it seems to promote many physiological changes that might favor long-term weight loss. However, it is important to recognize the controversy of the results regarding interval training (IT), which might be explained by the large variations in its application. For this reason, w...
Introduction: Combat sports have increasing popularity, which has been accompanied by high academ... more Introduction: Combat sports have increasing popularity, which has been accompanied by high academic-scientific interest. In judo, the focus on technical-tactical elements of the fight can contribute to identify determinants of performance. Objective: To describe and examine the inter-intra linear correlation of morpho functional variables with technical-tactical performance components of judo. Methods: Cross-sectional and observational study, with convenience sample, involving twelve male athletes (21.25 ± 5.04 years). Anthropometric measurements were performed and handgrip strength (HGS), thoracolumbar and leg flexibility (TLLF) were evaluated and body mass index (BMI) was calculated. The technical-tactical performance was examined by the analysis of time-movement from the athletes’ filming during real combat competition situations. Normality in data distribution was tested by Shapiro Wilk. The distribution of the types of blow was analyzed by ANOVA followed by Turkey test. Pearson...
A adolescencia e a fase compreendida dos 10 aos 19 anos de idade, e o segundo periodo em que o cr... more A adolescencia e a fase compreendida dos 10 aos 19 anos de idade, e o segundo periodo em que o crescimento tem sua velocidade maxima. Atletas adolescentes, em funcao da demanda energetica, podem apresentar erros alimentares importantes. O objetivo deste estudo foi avaliar a adequacao e a qualidade da dieta de adolescentes jogadores de futsal das categorias sub 13, sub 15 e sub 17 de um clube esportivo antes e depois de intervencao nutricional para uma alimentacao saudavel. Foi realizada uma intervencao nutricional durante os meses de marco a maio de 2015 com adolescentes da equipe de futsal de um clube esportivo da cidade de Pelotas/RS, que consistiu em orientacoes para habitos alimentares mais saudaveis, utilizando como parâmetro os Dez Passos da Alimentacao Saudavel para Adolescentes do Ministerio da Saude. O estado nutricional e o consumo alimentar foram avaliados antes e apos a intervencao, com um intervalo de oito semanas entre os encontros. Participaram do estudo 32 adolescent...
Objective: To investigate the effects of the addition of a specific high-intensity intermittent t... more Objective: To investigate the effects of the addition of a specific high-intensity intermittent training (HIIT) protocol to the habitual training on the physical fitness of amateur wushu sanda athletes. Methods: This is an experimental study in which 6 amateur regional level wushu sanda athletes (24.6±6.4 yrs, 1.70±0.1m height, and 71.3±7.3kg weight) underwent a 2 session/week training program for 4 weeks. The HIIT specific protocol was composed of 3 rounds of 2 minutes with 1-minute intervals in between, simulating a match duration. Each round was divided into 8 blocks of 15 seconds. Each block was composed of 5 seconds of high-intensity activities, 5 seconds of low-intensity activities and 5 seconds of pause. Countermovement jump, squat jump, horizontal jump, aerobic fitness (TKDtest) and kick speed test (FSOK) were applied. Results: Athletes presented performance increases in countermovement jump (from 41±5.7 to 47.3±7.3cm, p=0.007, g=0.88), horizontal jump (from 1.7±0.4 to 2.3±0...
Background and Study Aim: In Brazilian Jiu-Jitsu (BJJ) competitions are based in two models accor... more Background and Study Aim: In Brazilian Jiu-Jitsu (BJJ) competitions are based in two models accordingly to permitted clothing. The aim of this study was knowledge about physical and physiological responses, as well as the time-motion structure and technical-tactical actions induced by gi (traditional uniform) and nogi (where “gi” it is not permitted) simulated combats. Material and Methods: Twelve male athletes (age: 23 ±5 years, body mass: 81 ±8 kg, time of practice: 8 ±2 years) in two different conditions of simulated combats (gi and nogi). Blood lactate, heart rate, lower limbs power, strength and endurance handgrip were collected to asses physical and physiological demands. Additionally, technical-tactical and time-motion was analysed. Results: Considering the physiological responses showed significant differences between moments (p<0.001), but not between conditions (p = 0.14 for heart rate, and p = 0.57 for blood lactate). For technical-tactical variables, differences betwe...
The novel coronavirus disease (COVID-19) has emerged at the end of 2019 and caused a global pande... more The novel coronavirus disease (COVID-19) has emerged at the end of 2019 and caused a global pandemic. The disease predominantly affects the respiratory system; however, there is evidence that it is a multisystem disease that also impacts the cardiovascular system. Although the long-term consequences of COVID-19 are not well-known, evidence from similar diseases alerts for the possibility of long-term impaired physical function and reduced quality of life, especially in those requiring critical care. Therefore, rehabilitation strategies are needed to improve outcomes in COVID-19 survivors. Among the possible strategies, resistance training (RT) might be particularly interesting, since it has been shown to increase functional capacity both in acute and chronic respiratory conditions and in cardiac patients. The present article aims to propose evidence-based and practical suggestions for RT prescription for people who have been diagnosed with COVID-19 with a special focus on immune, re...
ABSTRACT Objective This investigation aimed to compare acute and delayed biochemical, hematologic... more ABSTRACT Objective This investigation aimed to compare acute and delayed biochemical, hematological, and neuromuscular responses to the Rest-pause (RP) method and traditional resistance training (TRT) through 48 h. Methods This crossover design study, in which the training sessions were separated by a 7-days washout interval. Twelve recreationally trained males (age: 22.4 ± 1.8 years) realized the RP protocol, consisting of two sets of 6-3-3 repetitions at 90% of 6-repetition maximum (6RM) and 20 s of rest between repetitions and 2:30 min between sets and TRT protocol, consistent of 3 sets of 8 repetitions at 85% of 6RM with 2 min between sets. Blood analyses and neuromuscular performance were measured before (PRE), immediately after (POST) and 24 (24H) and, 48 h (48H) after protocols. Results Regarding between-moments comparisons, biochemical and hematological responses increased after protocols (p < 0.05) and returned the baseline values after 24H (p > 0.05). Only creatine kinase, aspartate aminotransferase, neutrophiles, and white blood cells increased after protocols (p < 0.05) and returned to baseline values after 48H (p > 0.05). No significant difference between moments was found for neuromuscular performance (p > 0.05). Regarding difference between groups, red blood cells and hemoglobin showed lower values for the RP in comparison to the TRT after 24H (p = 0.03). Conclusion The sets configurations seem to be insufficient to induce an additional effect in muscle damage markers, immune responses, and neuromuscular performance. Finally, it seems that advanced techniques with lower volume don’t affect the immune system for long time periods.
Aerobic exercise is traditionally recommended to improve general health and prevent many non-comm... more Aerobic exercise is traditionally recommended to improve general health and prevent many non-communicable diseases. However, the measures adopted to control the novel Coronavirus (COVID-19) outbreak culminated with closing of exercise facilities and fitness centers and, as a primary consequence, impaired aerobic exercise practice. This contributed to an increase in risk factors associated with physical inactivity such as insulin resistance, high blood pressure, low-grade inflammation, weight gain, and mental health problems. The scenario is worrisome, and it is important to propose alternatives for exercise practice during the COVID-19 pandemic. Interval training (IT) emerges as an exercise mode that might be feasible, low-cost, and potentially safe to be performed in many different places. IT consists of interspersing relative brief bouts of high-intensity exercise with recovery periods and promotes similar or greater health benefits when compared to moderate-intensity continuous e...
Background One of the most popular high-intensity interval exercises is the called “Tabata Protoc... more Background One of the most popular high-intensity interval exercises is the called “Tabata Protocol”. However, most investigations have limitations in describing the work intensity, and this fact appears to be due to the protocol unfeasibility. Furthermore, the physiological demands and energetic contribution during this kind of exercise remain unclear. Methods Eight physically active students (21.8 ± 3.7 years) and eight well-trained cycling athletes (27.8 ± 6.4 years) were enrolled. In the first visit, we collected descriptive data and the peak power output (PPO). On the next three visits, in random order, participants performed interval training with the same time structure (effort:rest 20s:10s) but using different intensities (115%, 130%, and 170% of PPO). We collected the number of sprints, power output, oxygen consumption, blood lactate, and heart rate. Results The analysis of variance for multivariate test (number of sprints, power output, blood lactate, peak heart rate and p...
International Journal of Sports Physiology and Performance
Background: Jumps are important evaluation tools for muscle strength and power and for interlimb ... more Background: Jumps are important evaluation tools for muscle strength and power and for interlimb asymmetries. Different jump tests are well related to athletic performance, prediction of injury risk, and common motor gestures of several sports such as soccer. Low-cost mobile applications (apps) have gained popularity for this measure. The authors hypothesized that the My Jump 2 app would be a valid tool to assess drop-jump performance and interlimb asymmetry in soccer players. Methods: Eleven male soccer players took part in this study (18.2 [1.3] y, 69.9 [9.5] kg, 174 [6.6] cm). The athletes performed each test twice on a force plate (gold-standard method), while the jumps were recorded through the mobile app. Measures with the My Jump 2 app were applied by 2 evaluators, independently and in duplicate (interrater and intrarater reliability). The agreement analysis between both evaluations was done using an intraclass correlation coefficient and Bland–Altman plots. Results: Compared...
Tissues usually super compensate during the period that follow physical exercise. Although this i... more Tissues usually super compensate during the period that follow physical exercise. Although this is widely accepted for muscle and glycogen, the compensatory effect is not usually applied to fat tissues. Notwithstanding, evidence for this has been present since the 1970s when it was first suggested that the increased lipogenic activity in response to training might be an adaptation that enables to restore an energy reserve that can be used in times of need. In this context, the present review aimed to summarize information about the effect of detraining on fat metabolism and the physiological responses associated with fat regain. A systematic search on PubMed and Scielo was performed using “training cessation,” “detraining,” “exercise detraining,” and “exercise cessation” combined with “fat tissue,” “adipose tissue,” “adipose metabolism,” and “fat metabolism,” as descriptors. From 377 results, 25 were included in this review, 12 humans and 13 rodents, resulting in a sample of 6772 hu...
Revista Brasileira de Cineantropometria & Desempenho Humano
The purpose of this investigation was to measure anthropometric and physical performance variable... more The purpose of this investigation was to measure anthropometric and physical performance variables of TKD athletes from the city of Pelotas - RS. Forty-five athletes aged 16.4 ± 5.2 years and time of practice of 3.25 ± 3.6 years were evaluated. Athletes performed anthropometric evaluation and physical, general and specific performance tests. In the sum of seven skin folds, men presented lower values ??(106.1 ± 49.5 mm versus 143.4 ± 43.2 mm, p <0.002). Male seniors presented better performance in the vertical jump compared to beginners (42.3 ± 8.5cm versus 24.8 ± 10.1cm, p <0.03) and to women (22.1 ± 4.3cm, p <0.03). Graduated individuals perform higher number of arm pushups than beginners and women and more repetitions in the abdominal test. Male junior and senior athletes had higher isometric handgrip strength than females (48.3 ± 3.9 kgf and 38.1 ± 12.6 kgf versus 29 ± 5.6 kgf, p <0.001). Men covered longer distance in the yo-yo test than women (606.6 ± 233.8m versus ...
Revista de Educação Física / Journal of Physical Education
Introdução: O Campo Operacional de Instrução (COI) demanda elevado esforço físico e mental.Objeti... more Introdução: O Campo Operacional de Instrução (COI) demanda elevado esforço físico e mental.Objetivo: Avaliar os efeitos das atividades de treinamento militar sobre indicadores de dano muscular periférico, de controle autonômico e de aptidão física em alunos do Núcleo de Preparação de Oficiais da Reserva (NPOR) de Pelotas.Métodos: Este estudo longitudinal, avaliou 18 alunos do curso de formação do NPOR, antes e após uma semana de atividade em COI com exercícios físicos intensos. Mensuraram-se a concentração sanguínea de creatina quinase [CK], os indicadores da variabilidade da frequência cardíaca (VFC) e o desempenho dos participantes em testes de aptidão física. O teste de Shapiro-Wilk foi utilizado para avaliar a normalidade dos dados e os momentos foram comparados com teste t de Student para amostras dependentes e as correlações testadas com a prova de Pearson. O nível de confiança das análises foi de 95%.Resultados: A potência de membros superiores e inferiores diminuiu (p<0,0...
To compare two different randori structure (high volume and short pauses-TRAD training vs low vol... more To compare two different randori structure (high volume and short pauses-TRAD training vs low volume with long pauses-COMP training) in the neuromuscular and metabolic responses of elite judo athletes. Methods: The first situation (TRAD) consisted of 12 randoris of 5 minutes with 45 seconds rest, and the other situation (COMP), consisted of 6 randoris of 5 minutes with 10 minutes between them. Physiological (Blood Lactate and Creatine Kinase), neuromuscular (Countermovement Jump and Medicine Ball Throws) and perceptive variables (Rating Perceived Exertion) were measured before and at the end of the sessions. Results: The subjective perception of effort at the end of the training was significantly higher in the TRAD training type (TRADpost: 8.1 ± 0.9 AU; COMPpost: 6.6 ± 1.5 AU, p <0.001). Blood lactate concentration (TRADpost: 6.4 ± 2.2 mmol/L; COMPpost: 8.1 ± 2.9 mmol/L; p <0.001), CMJ height (TRADpost: 36.2 ± 4.6 cm; COMPpost: 35.9 ± 4.3 cm, p = 0.012) and upper limb power performance (TRADpost: 6.4 ± 0.9 m; COMPpost: 6.3 ± 0.9 m p = 0.03) were significantly higher at the end of the two training sessions compared to their start, but there are no group effect. There is group effect in CK (TRADpost: 490.7 ± 273.5 U\L; COMPpost: 357.4 ± 203.8 U\L; p <0.001). Conclusions: This study demonstrated that TRAD and COMP Judo training induced similar physical demands, and both seem to not be enough to reach higher intensities, which made them distant methods of competitive reality.
High-intensity activity is an important aspect of football performance during competitive match p... more High-intensity activity is an important aspect of football performance during competitive match play. The aim of this study was to investigate the effect of beta-alanine supplementation throughout a short-duration intense football-specific training period prior to an international competition on measures of high-intensity running performance. Methods: Twenty-four elite international U20 female footballers (age 18 ± 1 y, height 1.67 ± 0.07 m, body mass 62.7 ± 7.4 kg) volunteered to perform the YoYo Intermittent Recovery Test Level 1 (YoYo IR1), the Running Anaerobic Sprint Test (RAST) and a 20-m maximal sprint test on two separate occasions, separated by 3 weeks of training and supplementation. Participants were randomly assigned to receive either 6.4 g•day −1 sustained-release beta-alanine (BA, N = 12) or an equivalent dose of maltodextrin (placebo, PL, N = 12) throughout a 3-week standardized training camp. Results: There was a main effect of group (P = 0.05) and time (P = 0.004) on YoYo IR1; overall values were lower in PL and distance covered was lower post-vs. presupplementation. There was no group × time interaction (P = 0.07). There was an effect of sprint number for RAST, but no further main effects and there were no effect for the 20-m sprint. Conclusions: Top-level female footballers involved in this intense 3-week training period prior to a competition worsened their high-intensity intermittent exercise capacity, and this negative result was not attenuated by a short-duration BA supplementation protocol throughout the same period. Further work is necessary to elucidate whether adapted training protocols and BA dosing regimens could lead to better results.
The study compared the effects of resistance training programs composed by multi-joint (MJ), sing... more The study compared the effects of resistance training programs composed by multi-joint (MJ), single-joint (SJ) and the combination of multi- and single-joint (MJ+SJ) exercises on muscle strength and hypertrophy in trained women. Thirty participants were divided into groups that performed only MJ exercises, SJ exercises and MJ+SJ exercises for six months. Participants were tested for 1-repetition maximum (RM) and muscle thickness (MT) before and after the intervention. All groups showed significant gains on 1RM tests from pre- to post-training (P<0.01). However, MJ and MJ+SJ groups obtained greater gains in 1RM for the MJ exercises in comparison with the SJ group. Increases in 1RM for the SJ exercises were similar among groups, with the exception of leg curl, where the SJ group obtained greater gains than MJ and MJ+SJ. All groups obtained significant increases in MT from pre- to post-training for all muscle groups. However, MJ and MJ+SJ groups presented greater increases in gluteu...
Strategies aiming to promote weight loss usually include anything that results in an increase in ... more Strategies aiming to promote weight loss usually include anything that results in an increase in energy expenditure (exercise) or a decrease in energy intake (diet). However, the probability of losing weight is low and the probability of sustained weight loss is even lower. Herein, we bring some questions and suggestions about the topic, with a focus on exercise interventions. Based on the current evidence, we should look at how metabolism changes in response to interventions instead of counting calories, so we can choose more efficient models that can account for the complexity of human organisms. In this regard, high-intensity training might be particularly interesting as a strategy to promote fat loss since it seems to promote many physiological changes that might favor long-term weight loss. However, it is important to recognize the controversy of the results regarding interval training (IT), which might be explained by the large variations in its application. For this reason, w...
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Papers by Victor Coswig