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Sant’Ana J, Franchini E, da Silva V, Diefenthaeler F. Effect of fatigue on reaction time, response time, performance time, and kick impact in taekwondo roundhouse kick. Sports Biomech 2016; 16:201-209. [DOI: 10.1080/14763141.2016.1217347] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Jader Sant’Ana
- Sports Centre, Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Emerson Franchini
- School of Physical Education and Sport, Department of Sport, University of São Paulo, Brazil
| | - Vinicius da Silva
- Sports Centre, Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Fernando Diefenthaeler
- Sports Centre, Biomechanics Laboratory, Federal University of Santa Catarina, Florianópolis, Brazil
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Detanico D, Dellagrana RA, Athayde MSDS, Kons RL, Góes A. Effect of a Brazilian Jiu-jitsu-simulated tournament on strength parameters and perceptual responses. Sports Biomech 2016; 16:115-126. [DOI: 10.1080/14763141.2016.1206143] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Jo E, Lewis KL, Higuera D, Hernandez J, Osmond AD, Directo DJ, Wong M. Dietary Caffeine and Polyphenol Supplementation Enhances Overall Metabolic Rate and Lipid Oxidation at Rest and After a Bout of Sprint Interval Exercise. J Strength Cond Res 2016; 30:1871-9. [DOI: 10.1519/jsc.0000000000001277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Diaz-Lara FJ, Del Coso J, García JM, Portillo LJ, Areces F, Abián-Vicén J. Caffeine improves muscular performance in elite Brazilian Jiu-jitsu athletes. Eur J Sport Sci 2016; 16:1079-86. [PMID: 26863885 DOI: 10.1080/17461391.2016.1143036] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Scientific information about the effects of caffeine intake on combat sport performance is scarce and controversial. The aim of this study was to investigate the effectiveness of caffeine to improve Brazilian Jiu-jitsu (BJJ)-specific muscular performance. Fourteen male and elite BJJ athletes (29.2 ± 3.3 years; 71.3 ± 9.1 kg) participated in a randomized double-blind, placebo-controlled and crossover experiment. In two different sessions, BJJ athletes ingested 3 mg kg(-1) of caffeine or a placebo. After 60 min, they performed a handgrip maximal force test, a countermovement jump, a maximal static lift test and bench-press tests consisting of one-repetition maximum, power-load, and repetitions to failure. In comparison to the placebo, the ingestion of the caffeine increased: hand grip force in both hands (50.9 ± 2.9 vs. 53.3 ± 3.1 kg; respectively p < .05), countermovement jump height (40.6 ± 2.6 vs. 41.7 ± 3.1 cm; p = .02), and time recorded in the maximal static lift test (54.4 ± 13.4 vs. 59.2 ± 11.9 s; p < .01).The caffeine also increased the one-repetition maximum (90.5 ± 7.7 vs. 93.3 ± 7.5 kg; p = .02), maximal power obtained during the power-load test (750.5 ± 154.7 vs. 826.9 ± 163.7 W; p < .01) and mean power during the bench-press exercise test to failure (280.2 ± 52.5 vs. 312.2 ± 78.3 W; p = .04). In conclusion, the pre-exercise ingestion of 3 mg kg(-1) of caffeine increased dynamic and isometric muscular force, power, and endurance strength in elite BJJ athletes. Thus, caffeine might be an effective ergogenic aid to improve physical performance in BJJ.
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Affiliation(s)
- Francisco Javier Diaz-Lara
- a Faculty of Sport Sciences, Sport Training Laboratory , University of Castilla-La Mancha , Toledo , Spain
| | - Juan Del Coso
- b Exercise Physiology Laboratory , Sport Science Institute, Camilo José Cela University , Madrid , Spain
| | - Jose Manuel García
- a Faculty of Sport Sciences, Sport Training Laboratory , University of Castilla-La Mancha , Toledo , Spain
| | - Luis J Portillo
- a Faculty of Sport Sciences, Sport Training Laboratory , University of Castilla-La Mancha , Toledo , Spain
| | - Francisco Areces
- b Exercise Physiology Laboratory , Sport Science Institute, Camilo José Cela University , Madrid , Spain
| | - Javier Abián-Vicén
- c Faculty of Sport Sciences, Performance and Sport Rehabilitation Laboratory , University of Castilla-La Mancha , Toledo , Spain
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Andreato LV, Julio UF, Gonçalves Panissa VL, Del Conti Esteves JV, Hardt F, Franzói de Moraes SM, Oliveira de Souza C, Franchini E. Brazilian Jiu-Jitsu Simulated Competition Part II: Physical Performance, Time-Motion, Technical-Tactical Analyses, and Perceptual Responses. J Strength Cond Res 2016; 29:2015-25. [PMID: 25559902 DOI: 10.1519/jsc.0000000000000819] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this study was to analyze performance, time structure, technical actions, and perceptual responses in Brazilian jiu-jitsu athletes during a simulated competition. For this purpose, 10 athletes were analyzed in a simulated competition (4 matches of 10 minutes). Physical tests and scales of the perception of effort and recovery were applied. The matches were recorded for the purpose of technical-tactical analysis and to determine the time structure. The main results show that in the simulated competition, reaction time (F(2.5,17.6) = 2.7; p = 0.087; η² = 0.28) and flexibility (F(7,63) = 1.5; p = 0.172; η² = 0.15) were unchanged across the matches. An analysis of variance showed a significant difference for grip endurance using the kimono (F(2.0,15.9) = 8.1; p = 0.004; η² = 0.50), which was not confirmed by the Bonferroni test. Jump height indicated postactivation potentiation after match 2 (F(7,63) = 3.5; p = 0.003; η² = 0.28). The maximal isometric handgrip strength in the dominant hand (F(3.2,28.6) = 2.9; p = 0.049; η² = 0.24) and in the nondominant hand (F(7,63) = 3.8; p = 0.002; η² = 0.30) showed a decline after matches 3 and 4. Although these data indicate the onset of fatigue, the effort/pause ratio of the matches was not altered (F(3,12) = 0.6; p = 0.624; η² = 0.13). The perceptions of effort (F(3,27) = 0.9; p = 0.469; η² = 0.09) and recovery (F(1.9,17.0) = 2.4; p = 0.125; η² = 0.21) and the degree of fatigue reported (F(1.5,13.8) = 0.5; p = 0.588; η² = 0.05) did not change during the simulated competition. Thus, it may be concluded that the execution of successive matches causes a decline in maximal isometric handgrip strength. No changes in the time structure of the matches or in the perceptual responses were observed.
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Affiliation(s)
- Leonardo V Andreato
- 1School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil; 2State University of Santa Catarina, Center of Physical Education, Physiotherapy, and Sports, Florianópolis, Brazil; 3Department of Physiology and Biophisics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and 4Human Physiology Department, State University of Maringá, Maringá, Brazil
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Lopes-Silva JP, da Silva Santos JF, Branco BHM, Abad CCC, de Oliveira LF, Loturco I, Franchini E. Caffeine Ingestion Increases Estimated Glycolytic Metabolism during Taekwondo Combat Simulation but Does Not Improve Performance or Parasympathetic Reactivation. PLoS One 2015; 10:e0142078. [PMID: 26539982 PMCID: PMC4634755 DOI: 10.1371/journal.pone.0142078] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/16/2015] [Indexed: 11/22/2022] Open
Abstract
Objectives The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation. Methods Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a capsule containing either caffeine (5 mg∙kg-1) or placebo (cellulose) one hour before the combat simulation (3 rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design. All simulated combat was filmed to quantify the time spent fighting in each round. Lactate concentration and rating of perceived exertion were measured before and after each round, while heart rate (HR) and the estimated contribution of the oxidative (WAER), ATP-PCr (WPCR), and glycolytic (W[La-]) systems were calculated during the combat simulation. Furthermore, parasympathetic reactivation after the combat simulation was evaluated through 1) taking absolute difference between the final HR observed at the end of third round and the HR recorded 60-s after (HRR60s), 2) taking the time constant of HR decay obtained by fitting the 6-min post-exercise HRR into a first-order exponential decay curve (HRRτ), or by 3) analyzing the first 30-s via logarithmic regression analysis (T30). Results Caffeine ingestion increased estimated glycolytic energy contribution in relation to placebo (12.5 ± 1.7 kJ and 8.9 ± 1.2 kJ, P = 0.04). However, caffeine did not improve performance as measured by attack number (CAF: 26. 7 ± 1.9; PLA: 27.3 ± 2.1, P = 0.48) or attack time (CAF: 33.8 ± 1.9 s; PLA: 36.6 ± 4.5 s, P = 0.58). Similarly, RPE (CAF: 11.7 ± 0.4 a.u.; PLA: 11.5 ± 0.3 a.u., P = 0.62), HR (CAF: 170 ± 3.5 bpm; PLA: 174.2 bpm, P = 0.12), oxidative (CAF: 109.3 ± 4.5 kJ; PLA: 107.9 kJ, P = 0.61) and ATP-PCr energy contributions (CAF: 45.3 ± 3.4 kJ; PLA: 46.8 ± 3.6 kJ, P = 0.72) during the combat simulation were unaffected. Furthermore, T30 (CAF: 869.1 ± 323.2 s; PLA: 735.5 ± 232.2 s, P = 0.58), HRR60s (CAF: 34 ± 8 bpm; PLA: 38 ± 9 bpm, P = 0.44), HRRτ (CAF: 182.9 ± 40.5 s, PLA: 160.3 ± 62.2 s, P = 0.23) and HRRamp (CAF: 70.2 ± 17.4 bpm; PLA: 79.2 ± 17.4 bpm, P = 0.16) were not affected by caffeine ingestion. Conclusions Caffeine ingestion increased the estimated glycolytic contribution during taekwondo combat simulation, but this did not result in any changes in performance, perceived exertion or parasympathetic reactivation.
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Affiliation(s)
- João Paulo Lopes-Silva
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
- * E-mail:
| | - Jonatas Ferreira da Silva Santos
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Braulio Henrique Magnani Branco
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | | | - Luana Farias de Oliveira
- Laboratory of Applied Nutrition and Metabolism, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Irineu Loturco
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
- NAR-Nucleus of High Performance in Sport, São Paulo, Brazil
| | - Emerson Franchini
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
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Bürger-Mendonça M, de Oliveira JC, Cardoso JR, Bielavsky M, Azevedo P. Changes in blood lactate concentrations during taekwondo combat simulation. J Exerc Rehabil 2015; 11:255-8. [PMID: 26535215 PMCID: PMC4625653 DOI: 10.12965/jer.150218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 08/15/2015] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to analyze blood lactate response before, during and after simulated taekwondo fight in young male athletes. The experiment was composed of simulated official taekwondo fight. During the experiment a total of 7 blood samples (25 μL) were collected that following: at rest, after 1st, 2nd, and 3rd rounds, and 3, 5, and 10 min after the end of combat. The results showed that blood lactate concentrations [Lac]B increased significantly after 1st, 2nd, and 3rd rounds of the combat compared to the rested values. The [Lac]B after 3rd round was higher when compared to 3, 5, and 10 min of recovery. After 10 min of passive recovery, the [Lac]B was significantly lesser than 3 and 5 min of recovery, and 2nd round. These data showed that taekwondo requires high activation of anaerobic lactic metabolism, and improves the ability to rapidly remove the lactate from blood.
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Affiliation(s)
- Marcos Bürger-Mendonça
- Healthy Science Faculty, Human Nutrition Posgraduate Program, Brasília University, Brasília, Brazil
| | | | | | | | - Paulo Azevedo
- Federal University of São Paulo, Human Movement Science Department, Santos, Brazil
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Abstract
OBJECTIVE Many studies have reported that Taekwondo training could improve body perception, control and brain activity, as assessed with an electroencephalogram. This study aimed to assess body intelligence and brain connectivity in children with Taekwondo training as compared to children without Taekwondo training. METHODS Fifteen children with Taekwondo training (TKD) and 13 age- and sex-matched children who had no previous experience of Taekwondo training (controls) were recruited. Body intelligence, clinical characteristics and brain connectivity in all children were assessed with the Body Intelligence Scale (BIS), self-report, and resting state functional magnetic resonance imaging. RESULTS The mean BIS score in the TKD group was higher than that in the control group. The TKD group showed increased low-frequency fluctuations in the right frontal precentral gyrus and the right parietal precuneus, compared to the control group. The TKD group showed positive cerebellum vermis (lobe VII) seed to the right frontal, left frontal, and left parietal lobe. The control group showed positive cerebellum seed to the left frontal, parietal, and occipital cortex. Relative to the control group, the TKD group showed increased functional connectivity from cerebellum seed to the right inferior frontal gyrus. CONCLUSION To the best of our knowledge, this is the first study to assess the effect of Taekwondo training on brain connectivity in children. Taekwondo training improved body intelligence and brain connectivity from the cerebellum to the parietal and frontal cortex.
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Affiliation(s)
- Young Jae Kim
- Department of Physical Education, Chung-Ang University, Seoul, Republic of Korea
| | - Eun Joo Cha
- Physical Education LAB, Chung-Ang University, Seoul, Republic of Korea
| | - Sun Mi Kim
- Department of Psychiatry, Chung-Ang University Hospital, Seoul, Republic of Korea
| | - Kyung Doo Kang
- Department of Exercise and Sport Science, University of Utah, UT, USA
| | - Doug Hyun Han
- Department of Psychiatry, Chung-Ang University Hospital, Seoul, Republic of Korea
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Kim WS, Choi CK, Yoon SH, Kwon JY. Usual dose of caffeine has a positive effect on somatosensory related postural stability in hemiparetic stroke patients. Ann Rehabil Med 2014; 38:775-83. [PMID: 25566476 PMCID: PMC4280373 DOI: 10.5535/arm.2014.38.6.775] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 08/14/2014] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the effect of caffeine on balance control of hemiparetic stroke patients, we investigated the difference in postural stability before and after drinking coffee by observing changes in stability index (SI) from posturography. METHODS Thirty patients with history of stroke and 15 age-matched healthy subjects participated in this study. Effect of group factor (of the control and stroke groups) and treatment factor (pre- and post-drinking of coffee) on SI were tested in three conditions: with eyes opened, with eyes closed, and with a pillow support. The effects of these factors on visual deprivation and somatosensory change of subjects were also tested. RESULTS Under all conditions, SI was higher in the stroke group than in the control group. Under eyes-open condition, the treatment factor was not statistically significant. Under eyes-closed condition, the interaction between group and treatment factor was statistically significant. After the subjects drank coffee, SI in the control group was increased. However, SI in the stroke group was decreased. Under pillow-supported condition, the interaction between group and treatment factor appeared marginally significant. For visual deprivation effect, the interaction between treatment and group factor was statistically significant. After caffeine consumption, the visual deprivation effect was increased in control group but decreased in the stroke group. For somatosensory change effect, the interaction between group and treatment factor was not statistically significant. CONCLUSION Postural stability of hemiparetic stroke patients related to somatosensory information was improved after intake of usual dose of caffeine.
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Affiliation(s)
- Woo Sub Kim
- Department of Rehabilitation Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Chang Kweon Choi
- Department of Rehabilitation Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Sang Ho Yoon
- Department of Rehabilitation Medicine, Veterans Health Service Medical Center, Seoul, Korea
| | - Jae Yeoun Kwon
- Department of Rehabilitation Medicine, Veterans Health Service Medical Center, Seoul, Korea
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