José Luiz Dantas | Universidade Estadual de Londrina (original) (raw)

Papers by José Luiz Dantas

Research paper thumbnail of The Relationship Between Rating of Perceived Exertion and Muscle Activity During Exhaustive Constant-Load Cycling

International Journal of Sports Medicine, 2010

Research paper thumbnail of Electromyographic Activity and Rate of Muscle Fatigue of the Quadriceps Femoris During Cycling Exercise in the Severe Domain

Journal of Strength and Conditioning Research, 2011

Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na ... more Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na graduação, ter me acolhido como seu aluno quando decidi pela vida acadêmica e por seu apoio nos novos rumos acadêmicos que decidi tomar. À prof. Drª. Jeane Barcelos Soriano, pelo incansável apoio e incentivo em sempre buscar mais, pelas longas conversas que muito me ajudaram a (re)encontrar meu caminho na longa jornada acadêmica que iniciei, e principalmente pela inspiração que me faz querer ser sempre um pesquisador e professor melhor. À equipe do Grupo de Estudos e Pesquisa em Sistema Neuromuscular e Exercício (GEPESINE), em especial meus grandes amigos Henrique Bortolotti, Adriano Pereira e José Luiz Dantas. Sem o apoio, a ajuda e a compreensão de vocês, esse trabalho não seria possível. Ao Grupo de Pesquisa e Estudo em Metabolismo, Nutrição e Exercício, que gentilmente cedeu as instalações de seu laboratório para a realização dos testes deste trabalho. Ao prof. Dr. Taufik Abrão e o estudante José Carlos Marinello, pela ajuda na construção das rotinas para análise do sinal EMG. À Priscilla Maia da Silva, por estar sempre no meu pé para que eu não perdesse os prazos, por nunca esquecer de perguntar se estava tudo bem, pelas pedaladas e cafés "filosóficos" e pela amizade, embora nova, já duradoura. Ao meu pai Ederson Camata e minha mãe Nilda Viana Camata, pelo amor e apoio sempre presentes. À Guídian Maria Correa Paulossi Camata, minha esposa, companheira de muitas batalhas e o grande amor da minha vida. Sem você ao meu lado, nada disso seria possível. Aos atletas que participaram deste estudo, doando seu tempo e esforço voluntariamente. Palavras-chave: Recursos ergogênicos. Fadiga. Desempenho esportivo. Time trial. Exercício de alta intensidade. CAMATA, Thiago Viana. Effects of caffeine on cycling performance in a 1-km cycling time-trial. 2011. 60 p. Dissertation (Master in Physical

Research paper thumbnail of Comparison of electromyography fatigue threshold in lower limb muscles in trained cyclists and untrained non-cyclists

Electromyography and clinical neurophysiology

The purpose of this study was to identify and compare the Electromyographic Fatigue Threshold (EM... more The purpose of this study was to identify and compare the Electromyographic Fatigue Threshold (EMG(FT)) determined in the Vastus Lateralis (VL), Rectus Femoris (RF), Biceps Femoris (BF), Semitendinosus (ST) and Tibialis Anterior (TA) during stationary cycling in trained cyclists and non-cyclists. Using a cycle ergometer, 13 cyclists (28.4 +/- 6.9 years; 70.3 +/- 13 kg; 176.1 +/- 8.5 cm) and 11 non-cyclists (25.8 +/- 4 years; 73 +/- 9.1 kg; 175 +/- 6.4 cm), performed a maximum incremental test (ITmax) (90 rpm) to determine the (EMG(FT)). Maximal power output (W(PEAK)) reached by cyclists was higher than for non-cyclists (372.6 W and 248.9 W respectively) (P < 0.01). For the five muscles analyzed in cyclists, EMG(FT) occurred at 85.7% of cases in the VL, 92.9% in RE 78.6% in BE 78.6% in ST and 50% in TA, while in the non-cyclists group, this occurrence was 100% to muscle VL, 100% to RF, 92.6% to BF, 78.6% to ST, and 78.6% to TA. Analyzing the percentage corresponding to the power a...

Research paper thumbnail of Fourier and Wavelet Spectral Analysis of EMG Signals in 1-km Cycling Time-Trial

Applied Mathematics, 2014

Frequency domain analyses in electromyographic (EMG) signals are frequently applied to assess mus... more Frequency domain analyses in electromyographic (EMG) signals are frequently applied to assess muscle fatigue and similar variables. Moreover, Fourier-based approaches are typically used for investigating these procedures. Nonetheless, Fourier analysis assumes the signal as stationary which is unlikely during dynamic contractions. As an alternative method, wavelet-based treatments do not assume this pattern and may be considered as more appropriate for joint time-frequency domain analysis. Based on the previous statements, the purpose of the present study was to compare the application of Short-Time Fourier Transform (STFT) and Continuous Wavelet Transform (CWT) to assess muscle fatigue in dynamic exercise of a 1-km of cycling (time-trial condition). The results of this study indicated that CWT and STFT analyses have provided similar fatigue estimates (slope) (p > 0.05). However, CWT application represents lesser dispersion (<variance) in comparison with STFT (p < 0.05) for vastus medialis (189.9 ± 82.1 for STFT vs 148.6 ± 60.2 for CWT) and vastus lateralis (151.6 ± 49.6 for STFT vs 103.5 ± 27.9 for CWT). In conclusion, despite the EMG signal did not change (p > 0.05) according to different methods, it is important to note that these responses seem to show greater values for CWT compared to STFT for 2 superficial muscles. Thereby, we are capable of considering CWT as a reliable and useful method to take into consideration when non-stationary or oscillating exercise models are evaluated.

Research paper thumbnail of Influence of Different Strategies of Treatment Muscle Contraction and Relaxation Phases on EMG Signal Processing and Analysis During Cyclic Exercise

Computational Intelligence in Electromyography Analysis - A Perspective on Current Applications and Future Challenges, 2012

For a long time we work with muscular activity, trying to answer questions related to fatigue, mu... more For a long time we work with muscular activity, trying to answer questions related to fatigue, muscle activity and other issues related to neuromuscular system. In this way we started to use the electromyography (EMG) as a tool to achieve better results in our studies, since it appeared to us as a truthful method to access the muscle activity inside a lot of perspectives we had been working with. In this chapter we will try to bring some research results that we found on the GEPESINE laboratory in the last couple of years about regarding the EMG analysis. Firstly there are relevant issues that arise during the use of EMG as a tool in others works.

Research paper thumbnail of Determination of Blood Lactate Training Zone Boundaries With Rating of Perceived Exertion in Runners

Journal of Strength and Conditioning Research, 2015

This study aimed to determine the rating of perceived exertion (RPE) values corresponding to the ... more This study aimed to determine the rating of perceived exertion (RPE) values corresponding to the blood lactate concentration (BLC) training zone boundaries (2 and 4 mmol.L -1 ) in moderately trained runners using the Borg CR-10 scale. Moderately trained runners (n = 95) performed a submaximal incremental test on a treadmill, recording BLC and RPE at every stage. Simple linear regression analysis was used to determine the RPE values corresponding to the BLC training zone boundaries, which revealed that RPE was significantly and strongly correlated with BLC (r= 0.821; P< 0.001; R 2 = 0.675; adjusted R 2 = 0.674; standard error of estimate= 1.18). The prediction equation (RPE= 1.092 × BLC + 2.143) was obtained and RPE values at the BLC training zone boundaries of 2 mmol.L -1 and 4 mmol.L -1 calculated as 4.3 (95% CI, 3.9-4.7) and 6.5 (95% CI, 6.0-7.1), respectively. In conclusion, the RPE values at the BLC training zone boundaries of 2 mmol.L -1 (4.3) and 4 mmol.L -1 (6.5) were adequately predicted. RPE (4.3 and 6.5) can be used as an affordable tool for controlling intensity in order to maintain the athletes in prescribed zones during training sessions. lactate steady state is achieved. Running exercise performed at RPE 6.5 ensures that most of the exercise session is performed in the lactate accumulation zone ( 4 mmol.L -1 ) and can be used during the work stimulus of a high intensity interval training session rather than a continuous training session. Perform 7: 175-182, 2012. 10. Eston, RG and Williams, JG. Reliability of ratings of perceived effort regulation of exercise intensity. Br J Sports Med 22: 153-155, 1988. Doleshal, P, and Dodge, C. A new approach to monitoring exercise training. J Strength Cond Res 15: 109-115, 2001. 12. Green, JM, McLester, JR, Crews, TR, Wickwire, PJ, Pritchett, RC, and Redden, A. RPE-lactate dissociation during extended cycling. Eur J Appl Physiol 94:

Research paper thumbnail of Electromyographic Activity and Rate of Muscle Fatigue of the Quadriceps Femoris During Cycling Exercise in the Severe Domain

Journal of Strength and Conditioning Research, 2011

Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na ... more Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na graduação, ter me acolhido como seu aluno quando decidi pela vida acadêmica e por seu apoio nos novos rumos acadêmicos que decidi tomar. À prof. Drª. Jeane Barcelos Soriano, pelo incansável apoio e incentivo em sempre buscar mais, pelas longas conversas que muito me ajudaram a (re)encontrar meu caminho na longa jornada acadêmica que iniciei, e principalmente pela inspiração que me faz querer ser sempre um pesquisador e professor melhor. À equipe do Grupo de Estudos e Pesquisa em Sistema Neuromuscular e Exercício (GEPESINE), em especial meus grandes amigos Henrique Bortolotti, Adriano Pereira e José Luiz Dantas. Sem o apoio, a ajuda e a compreensão de vocês, esse trabalho não seria possível. Ao Grupo de Pesquisa e Estudo em Metabolismo, Nutrição e Exercício, que gentilmente cedeu as instalações de seu laboratório para a realização dos testes deste trabalho. Ao prof. Dr. Taufik Abrão e o estudante José Carlos Marinello, pela ajuda na construção das rotinas para análise do sinal EMG. À Priscilla Maia da Silva, por estar sempre no meu pé para que eu não perdesse os prazos, por nunca esquecer de perguntar se estava tudo bem, pelas pedaladas e cafés "filosóficos" e pela amizade, embora nova, já duradoura. Ao meu pai Ederson Camata e minha mãe Nilda Viana Camata, pelo amor e apoio sempre presentes. À Guídian Maria Correa Paulossi Camata, minha esposa, companheira de muitas batalhas e o grande amor da minha vida. Sem você ao meu lado, nada disso seria possível. Aos atletas que participaram deste estudo, doando seu tempo e esforço voluntariamente. Palavras-chave: Recursos ergogênicos. Fadiga. Desempenho esportivo. Time trial. Exercício de alta intensidade. CAMATA, Thiago Viana. Effects of caffeine on cycling performance in a 1-km cycling time-trial. 2011. 60 p. Dissertation (Master in Physical

Research paper thumbnail of Fourier and Wavelet spectral analysis of EMG signals in supramaximal constant load dynamic exercise

… in Medicine and …, Aug 31, 2010

Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently ... more Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently used to assess muscle fatigue. Fourier based approaches are typically used in these analyses, yet Fourier analysis assumes signal stationarity, which is unlikely during dynamic contractions. Wavelet based methods of signal analysis do not assume stationarity and may be more appropriate for joint time-frequency domain analysis. The purpose of this study was to compare Short-Time Fourier Transform (STFT) and ...

Research paper thumbnail of The Relationship Between Rating of Perceived Exertion and Muscle Activity During Exhaustive Constant-Load Cycling

International Journal of Sports Medicine, 2010

Research paper thumbnail of Electromyographic Activity and Rate of Muscle Fatigue of the Quadriceps Femoris During Cycling Exercise in the Severe Domain

Journal of Strength and Conditioning Research, 2011

Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na ... more Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na graduação, ter me acolhido como seu aluno quando decidi pela vida acadêmica e por seu apoio nos novos rumos acadêmicos que decidi tomar. À prof. Drª. Jeane Barcelos Soriano, pelo incansável apoio e incentivo em sempre buscar mais, pelas longas conversas que muito me ajudaram a (re)encontrar meu caminho na longa jornada acadêmica que iniciei, e principalmente pela inspiração que me faz querer ser sempre um pesquisador e professor melhor. À equipe do Grupo de Estudos e Pesquisa em Sistema Neuromuscular e Exercício (GEPESINE), em especial meus grandes amigos Henrique Bortolotti, Adriano Pereira e José Luiz Dantas. Sem o apoio, a ajuda e a compreensão de vocês, esse trabalho não seria possível. Ao Grupo de Pesquisa e Estudo em Metabolismo, Nutrição e Exercício, que gentilmente cedeu as instalações de seu laboratório para a realização dos testes deste trabalho. Ao prof. Dr. Taufik Abrão e o estudante José Carlos Marinello, pela ajuda na construção das rotinas para análise do sinal EMG. À Priscilla Maia da Silva, por estar sempre no meu pé para que eu não perdesse os prazos, por nunca esquecer de perguntar se estava tudo bem, pelas pedaladas e cafés "filosóficos" e pela amizade, embora nova, já duradoura. Ao meu pai Ederson Camata e minha mãe Nilda Viana Camata, pelo amor e apoio sempre presentes. À Guídian Maria Correa Paulossi Camata, minha esposa, companheira de muitas batalhas e o grande amor da minha vida. Sem você ao meu lado, nada disso seria possível. Aos atletas que participaram deste estudo, doando seu tempo e esforço voluntariamente. Palavras-chave: Recursos ergogênicos. Fadiga. Desempenho esportivo. Time trial. Exercício de alta intensidade. CAMATA, Thiago Viana. Effects of caffeine on cycling performance in a 1-km cycling time-trial. 2011. 60 p. Dissertation (Master in Physical

Research paper thumbnail of Comparison of electromyography fatigue threshold in lower limb muscles in trained cyclists and untrained non-cyclists

Electromyography and clinical neurophysiology

The purpose of this study was to identify and compare the Electromyographic Fatigue Threshold (EM... more The purpose of this study was to identify and compare the Electromyographic Fatigue Threshold (EMG(FT)) determined in the Vastus Lateralis (VL), Rectus Femoris (RF), Biceps Femoris (BF), Semitendinosus (ST) and Tibialis Anterior (TA) during stationary cycling in trained cyclists and non-cyclists. Using a cycle ergometer, 13 cyclists (28.4 +/- 6.9 years; 70.3 +/- 13 kg; 176.1 +/- 8.5 cm) and 11 non-cyclists (25.8 +/- 4 years; 73 +/- 9.1 kg; 175 +/- 6.4 cm), performed a maximum incremental test (ITmax) (90 rpm) to determine the (EMG(FT)). Maximal power output (W(PEAK)) reached by cyclists was higher than for non-cyclists (372.6 W and 248.9 W respectively) (P < 0.01). For the five muscles analyzed in cyclists, EMG(FT) occurred at 85.7% of cases in the VL, 92.9% in RE 78.6% in BE 78.6% in ST and 50% in TA, while in the non-cyclists group, this occurrence was 100% to muscle VL, 100% to RF, 92.6% to BF, 78.6% to ST, and 78.6% to TA. Analyzing the percentage corresponding to the power a...

Research paper thumbnail of Fourier and Wavelet Spectral Analysis of EMG Signals in 1-km Cycling Time-Trial

Applied Mathematics, 2014

Frequency domain analyses in electromyographic (EMG) signals are frequently applied to assess mus... more Frequency domain analyses in electromyographic (EMG) signals are frequently applied to assess muscle fatigue and similar variables. Moreover, Fourier-based approaches are typically used for investigating these procedures. Nonetheless, Fourier analysis assumes the signal as stationary which is unlikely during dynamic contractions. As an alternative method, wavelet-based treatments do not assume this pattern and may be considered as more appropriate for joint time-frequency domain analysis. Based on the previous statements, the purpose of the present study was to compare the application of Short-Time Fourier Transform (STFT) and Continuous Wavelet Transform (CWT) to assess muscle fatigue in dynamic exercise of a 1-km of cycling (time-trial condition). The results of this study indicated that CWT and STFT analyses have provided similar fatigue estimates (slope) (p > 0.05). However, CWT application represents lesser dispersion (<variance) in comparison with STFT (p < 0.05) for vastus medialis (189.9 ± 82.1 for STFT vs 148.6 ± 60.2 for CWT) and vastus lateralis (151.6 ± 49.6 for STFT vs 103.5 ± 27.9 for CWT). In conclusion, despite the EMG signal did not change (p > 0.05) according to different methods, it is important to note that these responses seem to show greater values for CWT compared to STFT for 2 superficial muscles. Thereby, we are capable of considering CWT as a reliable and useful method to take into consideration when non-stationary or oscillating exercise models are evaluated.

Research paper thumbnail of Influence of Different Strategies of Treatment Muscle Contraction and Relaxation Phases on EMG Signal Processing and Analysis During Cyclic Exercise

Computational Intelligence in Electromyography Analysis - A Perspective on Current Applications and Future Challenges, 2012

For a long time we work with muscular activity, trying to answer questions related to fatigue, mu... more For a long time we work with muscular activity, trying to answer questions related to fatigue, muscle activity and other issues related to neuromuscular system. In this way we started to use the electromyography (EMG) as a tool to achieve better results in our studies, since it appeared to us as a truthful method to access the muscle activity inside a lot of perspectives we had been working with. In this chapter we will try to bring some research results that we found on the GEPESINE laboratory in the last couple of years about regarding the EMG analysis. Firstly there are relevant issues that arise during the use of EMG as a tool in others works.

Research paper thumbnail of Determination of Blood Lactate Training Zone Boundaries With Rating of Perceived Exertion in Runners

Journal of Strength and Conditioning Research, 2015

This study aimed to determine the rating of perceived exertion (RPE) values corresponding to the ... more This study aimed to determine the rating of perceived exertion (RPE) values corresponding to the blood lactate concentration (BLC) training zone boundaries (2 and 4 mmol.L -1 ) in moderately trained runners using the Borg CR-10 scale. Moderately trained runners (n = 95) performed a submaximal incremental test on a treadmill, recording BLC and RPE at every stage. Simple linear regression analysis was used to determine the RPE values corresponding to the BLC training zone boundaries, which revealed that RPE was significantly and strongly correlated with BLC (r= 0.821; P< 0.001; R 2 = 0.675; adjusted R 2 = 0.674; standard error of estimate= 1.18). The prediction equation (RPE= 1.092 × BLC + 2.143) was obtained and RPE values at the BLC training zone boundaries of 2 mmol.L -1 and 4 mmol.L -1 calculated as 4.3 (95% CI, 3.9-4.7) and 6.5 (95% CI, 6.0-7.1), respectively. In conclusion, the RPE values at the BLC training zone boundaries of 2 mmol.L -1 (4.3) and 4 mmol.L -1 (6.5) were adequately predicted. RPE (4.3 and 6.5) can be used as an affordable tool for controlling intensity in order to maintain the athletes in prescribed zones during training sessions. lactate steady state is achieved. Running exercise performed at RPE 6.5 ensures that most of the exercise session is performed in the lactate accumulation zone ( 4 mmol.L -1 ) and can be used during the work stimulus of a high intensity interval training session rather than a continuous training session. Perform 7: 175-182, 2012. 10. Eston, RG and Williams, JG. Reliability of ratings of perceived effort regulation of exercise intensity. Br J Sports Med 22: 153-155, 1988. Doleshal, P, and Dodge, C. A new approach to monitoring exercise training. J Strength Cond Res 15: 109-115, 2001. 12. Green, JM, McLester, JR, Crews, TR, Wickwire, PJ, Pritchett, RC, and Redden, A. RPE-lactate dissociation during extended cycling. Eur J Appl Physiol 94:

Research paper thumbnail of Electromyographic Activity and Rate of Muscle Fatigue of the Quadriceps Femoris During Cycling Exercise in the Severe Domain

Journal of Strength and Conditioning Research, 2011

Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na ... more Ao meu orientador Prof. Dr. Leandro Ricardo Altimari, por ter me apresentado à pesquisa ainda na graduação, ter me acolhido como seu aluno quando decidi pela vida acadêmica e por seu apoio nos novos rumos acadêmicos que decidi tomar. À prof. Drª. Jeane Barcelos Soriano, pelo incansável apoio e incentivo em sempre buscar mais, pelas longas conversas que muito me ajudaram a (re)encontrar meu caminho na longa jornada acadêmica que iniciei, e principalmente pela inspiração que me faz querer ser sempre um pesquisador e professor melhor. À equipe do Grupo de Estudos e Pesquisa em Sistema Neuromuscular e Exercício (GEPESINE), em especial meus grandes amigos Henrique Bortolotti, Adriano Pereira e José Luiz Dantas. Sem o apoio, a ajuda e a compreensão de vocês, esse trabalho não seria possível. Ao Grupo de Pesquisa e Estudo em Metabolismo, Nutrição e Exercício, que gentilmente cedeu as instalações de seu laboratório para a realização dos testes deste trabalho. Ao prof. Dr. Taufik Abrão e o estudante José Carlos Marinello, pela ajuda na construção das rotinas para análise do sinal EMG. À Priscilla Maia da Silva, por estar sempre no meu pé para que eu não perdesse os prazos, por nunca esquecer de perguntar se estava tudo bem, pelas pedaladas e cafés "filosóficos" e pela amizade, embora nova, já duradoura. Ao meu pai Ederson Camata e minha mãe Nilda Viana Camata, pelo amor e apoio sempre presentes. À Guídian Maria Correa Paulossi Camata, minha esposa, companheira de muitas batalhas e o grande amor da minha vida. Sem você ao meu lado, nada disso seria possível. Aos atletas que participaram deste estudo, doando seu tempo e esforço voluntariamente. Palavras-chave: Recursos ergogênicos. Fadiga. Desempenho esportivo. Time trial. Exercício de alta intensidade. CAMATA, Thiago Viana. Effects of caffeine on cycling performance in a 1-km cycling time-trial. 2011. 60 p. Dissertation (Master in Physical

Research paper thumbnail of Fourier and Wavelet spectral analysis of EMG signals in supramaximal constant load dynamic exercise

… in Medicine and …, Aug 31, 2010

Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently ... more Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently used to assess muscle fatigue. Fourier based approaches are typically used in these analyses, yet Fourier analysis assumes signal stationarity, which is unlikely during dynamic contractions. Wavelet based methods of signal analysis do not assume stationarity and may be more appropriate for joint time-frequency domain analysis. The purpose of this study was to compare Short-Time Fourier Transform (STFT) and ...