Eur J Appl Physiol. 2010 Jul 13. [Epub ahead of print]
Plasma nesfatin-1 and glucoregulatory hormone responses to two different anaerobic exercise sessions.
Ghanbari-Niaki A, Kraemer RR, Soltani R.
Exercise Biochemistry Division, Faculty of Physical Education and Sports Sciences, University of Mazandaran, 47416-95447, Babolsar, Mazandaran, Iran, aghanbariniaki@gmail.com.
Abstract
Nesfatin-1 is a recently discovered anorectic protein derived from posttranslational processing of the nucleobindin 2 (NUCB2) gene. It is expressed in adipose tissue and is also found in plasma. Nesfatin-1 expression is significantly affected by nutritional status and its actions may be involved in the inhibition of the orexigenic effect of ghrelin. Although the effects of physical exercise on several anorectic and orexigenic hormones have been reported, no studies have investigated its effects upon circulating concentrations of nesfatin-1. We investigated the effects of acute strenuous interval exercise and circuit exercise on nesfatin and other hormones affected by metabolic stress. Fourteen provincial and national level young male-kickboxing volunteers participated [age 20.71 +/- 2.6 years, height 176.6 +/- 2.8 cm, body weight 67.2 +/- 3.3 kg, and body mass index (BMI) 21.56 +/- 1.42 kg/m(2)]. After an overnight fast, responses to a running-based anaerobic sprint test (RAST; 7 sets of 6 x 35 m every 10 s with 1 min rest in between sets) and a non-combat kickboxing session (NCKB; 7 sets of 6 techniques, 20 s per technique with 1 min rest in between sets) were determined. Venous blood samples were collected before, immediately after, and 45 as well as 95 min following the exercises. Plasma GH, insulin, glucose and lactate concentrations significantly increased immediately following the RAST and NCKB protocols, however, plasma nesfatin-1 concentrations were not significantly altered. Higher plasma cortisol and glucose concentrations occurred in response to the RAST compared with the NCKB protocols. Although the exercise protocols elicited metabolic stress that significantly altered circulating glucoregulatory hormones, plasma glucose and lactate, there was no significant change in plasma nesfatin-1. A lack of nesfatin-1 response to the exercise protocols may be partially due to the fasting condition.
http://grupodestudoslutas.blogspot.com
Inscrever-se
Postagens
Comentários
quarta-feira, 4 de agosto de 2010
Released in USA
Advancements in the Scientific Study of Combative Sports
Editors: Jason E. Warnick and W. Daniel Martin (Arkansas Tech University, Russellville, AR )
Book Description:
Combative sports, like boxing and the martial arts, have been a mainstay of competitive athletics throughout the history of mankind. While these sports are controversial in nature, the athletic endeavors of boxing and mixed martial arts have become multi-billion dollar industries enjoyed by millions of fans around the world. Research on these sports has spanned many domains including psychology, sociology, physiology, sports medicine and biomechanics. Each of these approaches to the topic of combative sports has provided many interesting findings. Further, each field has offered advancements that have improved the sports’ training, judging, safety, and associated medical care. However, until now, research within each of these domains has been published in journals specifically targeting scholars in that field. Thus, interdisciplinary research on this topic has remained rare and has seldom been promoted. This book seeks to provide a central outlet for the current research on combative sports, provoke interdisciplinary approaches to the field, and provoke further research and advancements on the topic. For scholars interested in combative sports, various aspects (e.g., mental, physical and cultural) of athletics and sports medicine, this book will be useful as both a starting point and a reference guide for the field.
Table of Contents:
Preface
Chapter 1. A Review of the Variables Predictive of a Professional Boxing Bout’s Outcome, pp. 1-11 (Jason E. Warnick, Kyla Warnick, Andrew Johnson and W. Daniel Martin)
Chapter 2. High Intensity Training and the Mixed Martial Artist, pp. 13-39
(John Amtmann)
Chapter 3. Special Judo Fitness Test: Development and Results, pp. 41-59
(Emerson Franchini, Fabrício Boscolo Del Vecchio and Stanislaw Sterkowicz)
Chapter 4. Biomechanics of Kung Fu Palm Strike, pp. 61-78
(Osmar Pinto Neto)
Chapter 5. Judo and Variability: Application to Technical Actions During the Match, pp. 79-96(Emerson Franchini and Fabrício Boscolo Del’Vecchio)
Chapter 6. The Influence of Painful Stimulation During Asian Martial Arts Training on Pain Perception, pp. 97-111
(Monika Dirkwinkel and Stefan Evers)
Chapter 7. Handedness, Achievement in Sport and Boxing, pp. 113-127
(Recep Gursoy, Mehmet Akif Ziyagil, Suleyman Sahin and Senol Dane)
Chapter 8. Further Evidence of the Availability Heuristic Bias for Boxing Awards, pp. 129-133(Jason E. Warnick and Kyla Warnick)
Chapter 9. Injuries in the Martial Arts, pp. 135-161
(Merrilee Zetaruk)
Chapter 10. Health Benefits Associated with Kung Fu Training, pp. 163-181
(Tracey W. Tsang)
Chapter 11. The Biomechanics of Impact in Boxing, pp. 183-200
Cynthia A. Bir and Sarah Stojsih)
Index
Series:
Sports and Athletics Preparation, Performance, and Psychology
Binding: Hardcover
Pub. Date: 2010
Pages: 6 x 9
ISBN: 978-1-60876-733-5
https://www.novapublishers.com/catalog/product_info.php?cPath=23_147&products_id=11448&osCsid=2d0b
Editors: Jason E. Warnick and W. Daniel Martin (Arkansas Tech University, Russellville, AR )
Book Description:
Combative sports, like boxing and the martial arts, have been a mainstay of competitive athletics throughout the history of mankind. While these sports are controversial in nature, the athletic endeavors of boxing and mixed martial arts have become multi-billion dollar industries enjoyed by millions of fans around the world. Research on these sports has spanned many domains including psychology, sociology, physiology, sports medicine and biomechanics. Each of these approaches to the topic of combative sports has provided many interesting findings. Further, each field has offered advancements that have improved the sports’ training, judging, safety, and associated medical care. However, until now, research within each of these domains has been published in journals specifically targeting scholars in that field. Thus, interdisciplinary research on this topic has remained rare and has seldom been promoted. This book seeks to provide a central outlet for the current research on combative sports, provoke interdisciplinary approaches to the field, and provoke further research and advancements on the topic. For scholars interested in combative sports, various aspects (e.g., mental, physical and cultural) of athletics and sports medicine, this book will be useful as both a starting point and a reference guide for the field.
Table of Contents:
Preface
Chapter 1. A Review of the Variables Predictive of a Professional Boxing Bout’s Outcome, pp. 1-11 (Jason E. Warnick, Kyla Warnick, Andrew Johnson and W. Daniel Martin)
Chapter 2. High Intensity Training and the Mixed Martial Artist, pp. 13-39
(John Amtmann)
Chapter 3. Special Judo Fitness Test: Development and Results, pp. 41-59
(Emerson Franchini, Fabrício Boscolo Del Vecchio and Stanislaw Sterkowicz)
Chapter 4. Biomechanics of Kung Fu Palm Strike, pp. 61-78
(Osmar Pinto Neto)
Chapter 5. Judo and Variability: Application to Technical Actions During the Match, pp. 79-96(Emerson Franchini and Fabrício Boscolo Del’Vecchio)
Chapter 6. The Influence of Painful Stimulation During Asian Martial Arts Training on Pain Perception, pp. 97-111
(Monika Dirkwinkel and Stefan Evers)
Chapter 7. Handedness, Achievement in Sport and Boxing, pp. 113-127
(Recep Gursoy, Mehmet Akif Ziyagil, Suleyman Sahin and Senol Dane)
Chapter 8. Further Evidence of the Availability Heuristic Bias for Boxing Awards, pp. 129-133(Jason E. Warnick and Kyla Warnick)
Chapter 9. Injuries in the Martial Arts, pp. 135-161
(Merrilee Zetaruk)
Chapter 10. Health Benefits Associated with Kung Fu Training, pp. 163-181
(Tracey W. Tsang)
Chapter 11. The Biomechanics of Impact in Boxing, pp. 183-200
Cynthia A. Bir and Sarah Stojsih)
Index
Series:
Sports and Athletics Preparation, Performance, and Psychology
Binding: Hardcover
Pub. Date: 2010
Pages: 6 x 9
ISBN: 978-1-60876-733-5
https://www.novapublishers.com/catalog/product_info.php?cPath=23_147&products_id=11448&osCsid=2d0b
Sairá no International Journal of Sports Medicine
Int J Sports Med. 2010 Jul 19. [Epub ahead of print]
Body Composition and Power Changes in Elite Judo Athletes.
Silva AM, Fields DA, Heymsfield SB, Sardinha LB.
Faculty of Human Kinetics, Technical University of Lisbon, Exercise and Health Laboratory, Cruz-Quebrada, Portugal.
Abstract
The purpose of this study was to analyse the association between body composition changes, from a weight stable period to prior competition, on upper-body power in judo athletes. 27 top-level male athletes were evaluated at baseline (weight stable period) and 1-3 days before competition, with a time difference of approximately 1 month. Total body and extracellular water were estimated by dilution techniques (deuterium and bromide, respectively) and intracellular water was calculated as the difference. Body composition was assessed by DXA. A power-load spectrum was used to assess upper-body power output in a bench-press position. Comparison of means, bivariate, and partial correlations were used. Results indicate that though no significant mean changes were found in body composition and upper-body power, individual variability was large. Among all body composition changes, only total-body water (r=0.672; p<0.001) and intracellular water (r=0.596; p=0.001) were related to upper-body power variation. These associations remained significant after controlling for weight and arm lean-soft tissue changes (r=0.594, p=0.002 for total-body water; r=0.524, p=0.007 for intracellular water). These findings highlight the need for tracking total-body water, specifically the intracellular compartment in elite judo athletes in order to avoid reductions in upper-body power when a target body weight is desired prior to competition.
Body Composition and Power Changes in Elite Judo Athletes.
Silva AM, Fields DA, Heymsfield SB, Sardinha LB.
Faculty of Human Kinetics, Technical University of Lisbon, Exercise and Health Laboratory, Cruz-Quebrada, Portugal.
Abstract
The purpose of this study was to analyse the association between body composition changes, from a weight stable period to prior competition, on upper-body power in judo athletes. 27 top-level male athletes were evaluated at baseline (weight stable period) and 1-3 days before competition, with a time difference of approximately 1 month. Total body and extracellular water were estimated by dilution techniques (deuterium and bromide, respectively) and intracellular water was calculated as the difference. Body composition was assessed by DXA. A power-load spectrum was used to assess upper-body power output in a bench-press position. Comparison of means, bivariate, and partial correlations were used. Results indicate that though no significant mean changes were found in body composition and upper-body power, individual variability was large. Among all body composition changes, only total-body water (r=0.672; p<0.001) and intracellular water (r=0.596; p=0.001) were related to upper-body power variation. These associations remained significant after controlling for weight and arm lean-soft tissue changes (r=0.594, p=0.002 for total-body water; r=0.524, p=0.007 for intracellular water). These findings highlight the need for tracking total-body water, specifically the intracellular compartment in elite judo athletes in order to avoid reductions in upper-body power when a target body weight is desired prior to competition.
Saiu no Journal of Quantitative Analysis in Sport
An Examination of Judging Consistency in a Combat Sport
Tony Myers, Newman University College
Alan M. Nevill, University of Wolverhampton
Yahya Al-Nakeeb, Newman University College
Abstract
Two related studies compared the consistency of two different methods of interpreting and applying scoring criteria in Muay Thai that are normally used by officials in the UK and that are used by officials in Thailand. In the first study, levels of consistency were determined by comparing judge's scores (n=270) from forty-five bouts judged by UK officials and forty-five judged by Thai officials. In the second study the original forty-five bouts judged by UK judges were compared with forty–five bouts judged by UK officials using Thai judging criteria. Consistency was examined in both studies using two methods. The first method compared differences in the range of the highest vs. lowest points awarded by judges for each bout. The second method compared homogeneity of variance between judges' scores. Results suggested that the Thai officials were more consistent than their UK trained counterparts but also that UK judges were more consistent when adopting the Thai judging criteria. It was suggested that the use of very clearly defined criteria and concrete operationalization of otherwise subjective concepts used in applying the system used in Thailand was the main reason for the findings.
Available at:
http://www.bepress.com/jqas/vol6/iss3/3
Tony Myers, Newman University College
Alan M. Nevill, University of Wolverhampton
Yahya Al-Nakeeb, Newman University College
Abstract
Two related studies compared the consistency of two different methods of interpreting and applying scoring criteria in Muay Thai that are normally used by officials in the UK and that are used by officials in Thailand. In the first study, levels of consistency were determined by comparing judge's scores (n=270) from forty-five bouts judged by UK officials and forty-five judged by Thai officials. In the second study the original forty-five bouts judged by UK judges were compared with forty–five bouts judged by UK officials using Thai judging criteria. Consistency was examined in both studies using two methods. The first method compared differences in the range of the highest vs. lowest points awarded by judges for each bout. The second method compared homogeneity of variance between judges' scores. Results suggested that the Thai officials were more consistent than their UK trained counterparts but also that UK judges were more consistent when adopting the Thai judging criteria. It was suggested that the use of very clearly defined criteria and concrete operationalization of otherwise subjective concepts used in applying the system used in Thailand was the main reason for the findings.
Available at:
http://www.bepress.com/jqas/vol6/iss3/3
Vai sair na Motriz
A ingestão de cafeína não melhora o desempenho de atletas de judô
Lucas Adriano Pereira, Edílson Serpeloni Cyrino, Ademar Avelar, Alexandre Queiroz Sergantin, Juliana Melo Altimari, Michele Caroline de Costa Trindade, Leandro Ricardo Altimari
Resumo
O objetivo do presente estudo foi investigar os efeitos ergogênicos da ingestão de cafeína, sobre o desempenho motor de atletas de judô feminino. Participaram do estudo 13 atletas do sexo feminino (17,6 ± 1,6 anos, 58,3 ± 11,4 kg, 162 ± 4,1 cm, 22,5 ± 4 kg/m2), vinculadas à Federação Paranaense de Judô, por pelo menos dois anos. O desempenho motor foi avaliado mediante a utilização do Special Judô Fitness Test (SJFT), a partir do qual foi analisado o número de arremessos em cada bloco, número total de arremessos, frequência cardíaca (FC) final e de recuperação e o índice no SJFT. Os sujeitos foram testados em duas condições, após ingestão de cafeína (6 mg.kg-1) ou placebo (dextrose) 60 minutos antes dos testes, em um delineamento duplo-cego, cruzado. O número de arremessos em cada bloco não diferiu entre as condições cafeína (CAF) e placebo (PL) (Bloco A: 4,53 ± 0,51 CAF e 4,46 ± 0,51 PL; Bloco B: 8,3 ± 0,63 CAF e 8,23 ± 0,72 PL; Bloco C: 7,23 ± 0,59 CAF e 7,46 ± 0,77 PL), bem como o número total de arremessos (20,07 ± 1,18 CAF e 20,15 ± 1,67 PL), FC (Final: 190,3 ± 9,63 bpm CAF e 190,69 ± 9,19 bpm PL; Recuperação: 162,07 ± 13,78 bpm CAF e 164,3 ± 9,64 bpm PL) e índice no SJFT (17,59 ± 1,4 CAF e 17,75 ± 1,98 PL). A ingestão de cafeína não melhorou o desempenho durante atividade de alta intensidade e curta duração em lutadores de judô.
Bujutsu, Budô, esporte de luta
Carlos José Martins, Cláudia Kanashiro
Resumo
Este trabalho tem como objetivo analisar como se deu o processo de reconfiguração de uma das artes marciais japonesas mais conhecidas – o karate –, traçando sua história no contexto das mutações ocorridas na história do Japão.
Lucas Adriano Pereira, Edílson Serpeloni Cyrino, Ademar Avelar, Alexandre Queiroz Sergantin, Juliana Melo Altimari, Michele Caroline de Costa Trindade, Leandro Ricardo Altimari
Resumo
O objetivo do presente estudo foi investigar os efeitos ergogênicos da ingestão de cafeína, sobre o desempenho motor de atletas de judô feminino. Participaram do estudo 13 atletas do sexo feminino (17,6 ± 1,6 anos, 58,3 ± 11,4 kg, 162 ± 4,1 cm, 22,5 ± 4 kg/m2), vinculadas à Federação Paranaense de Judô, por pelo menos dois anos. O desempenho motor foi avaliado mediante a utilização do Special Judô Fitness Test (SJFT), a partir do qual foi analisado o número de arremessos em cada bloco, número total de arremessos, frequência cardíaca (FC) final e de recuperação e o índice no SJFT. Os sujeitos foram testados em duas condições, após ingestão de cafeína (6 mg.kg-1) ou placebo (dextrose) 60 minutos antes dos testes, em um delineamento duplo-cego, cruzado. O número de arremessos em cada bloco não diferiu entre as condições cafeína (CAF) e placebo (PL) (Bloco A: 4,53 ± 0,51 CAF e 4,46 ± 0,51 PL; Bloco B: 8,3 ± 0,63 CAF e 8,23 ± 0,72 PL; Bloco C: 7,23 ± 0,59 CAF e 7,46 ± 0,77 PL), bem como o número total de arremessos (20,07 ± 1,18 CAF e 20,15 ± 1,67 PL), FC (Final: 190,3 ± 9,63 bpm CAF e 190,69 ± 9,19 bpm PL; Recuperação: 162,07 ± 13,78 bpm CAF e 164,3 ± 9,64 bpm PL) e índice no SJFT (17,59 ± 1,4 CAF e 17,75 ± 1,98 PL). A ingestão de cafeína não melhorou o desempenho durante atividade de alta intensidade e curta duração em lutadores de judô.
Bujutsu, Budô, esporte de luta
Carlos José Martins, Cláudia Kanashiro
Resumo
Este trabalho tem como objetivo analisar como se deu o processo de reconfiguração de uma das artes marciais japonesas mais conhecidas – o karate –, traçando sua história no contexto das mutações ocorridas na história do Japão.
Assinar:
Postagens (Atom)