Comparação entre limiar anaeróbio determinado por variáveis ventilatórias e pela resposta do lactato sanguíneo em ciclistas

Okano, Alexandre Hideki; Altimari, Leandro Ricardo; Simões, Herbert Gustavo; Moraes, Antônio Carlos de; Nakamura, Fábio Yuzo; Cyrino, Edílson Serpeloni; Burini, Roberto Carlos

doi:10.1590/s1517-86922006000100008

Cited by 13 publications

(10 citation statements)

References 40 publications

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“…During this test, physical fitness is evaluated by determining parameters of physiological thresholds, such as maximum oxygen uptake (VO 2 max), or by measuring blood lactate and estimated VO 2 max [9]. VO 2 max corresponds to the moment when the maximum capacity to deliver oxygen for glucose oxidation is achieved.…”

Section: Introductionmentioning

confidence: 99%

“…The persistence of physical effort after reaching the LT leads to loss of the oxidative capacity of the muscle, shifting the metabolism to anaerobic, which leads to lactate accumulation, faster fatigue, release of catecholamine and increase blood glucose levels [10, 11]. Physical fitness evaluation through blood lactate measurement, especially using portable devices, can easily be performed in field tests, besides being accessible to most physical evaluation professionals due to its relatively low cost [9]. In healthy subjects, measurement of blood lactate during exercise has been used to evaluate aerobic capacity and to determine the ideal intensity of exercise [12].…”

Section: Introductionmentioning

confidence: 99%

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Type 1 diabetes does not impair the physical capacity of non-sedentary adolescents

Nascimento

Espindola

Prado

et al. 2017

Diabetol Metab Syndr

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BackgroundType 1 diabetes patients have a higher risk of developing hypoglycemia or hyperglycemia during physical activity, which may compromise their safety during exercise but results regarding the exercise capacity of patients with type 1 DM when compared to control subjects have been contradictory.AimTo evaluate if type 1 diabetes affects the capacity of adolescents to exercise.MethodsThe study enrolled 37 adolescents in stage 2–4 of the Tanner scale, aged from 10 to 14 years, 21 with type 1 diabetes and 16 without any chronic diseases. All subjects performed an incremental submaximal exercise test in a cycle ergometer. At the end of every test stage, glycemia and blood lactate levels were measured. During the test, heart rate was monitored and the Borg rating of perceived exertion (RPE) was used to assess fatigue.ResultsThe two groups displayed no significant differences in anthropometric variables. The response to exercise, as evaluated by Borg RPE (p = 0.829), maximum oxygen uptake (VO2max) (p = 0.977), heart rate (p = 0.998), maximum load (p = 0.977), absolute load at lactate threshold (p = 0.377) and relative load at lactate threshold (p = 0.282), was also similar between the control and the type 1 diabetes group. Finally, there were no significant correlations between HbA1c levels, VO2max, duration of disease and pre-test glycemia levels.ConclusionsWe detected no significant differences in lactate threshold, VO2max and heart rate during exercise between healthy adolescents and non-sedentary adolescents with type I diabetes, indicating that both groups had similar physical fitness and, therefore, that type 1 diabetes is not an obstacle for physical activity. This study was approved by the ethical committee of the Hospital Israelita Albert Einstein (Ethical Committee Number: 53638416.9.0000.0071) and free and informed consent was obtained from all participants and their legal representatives.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Type 1 diabetes does not impair the physical capacity of non-sedentary adolescents

Nascimento

Espindola

Prado

et al. 2017

Diabetol Metab Syndr

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“…The decrease or insufficient elevation of this variable indicates ischemic disease, or morphological alterations in the cardiovascular system. 28,29 One of the classic studies on the behavior of heart rate during progressive physical exercise performed in healthy men during a ergometer test on cycle ergometer showed that heart rate values increased during LA compared to baseline.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Different Methods to Determine the Anaerobic Threshold of Transfemoral Amputees Using Prosthesis

Sousa¹

2017

IPMRJ

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IntroductionTransfemoral amputation is a withdrawal of the limb with a cut-off level between the disarticulation of the knee and the hip joint 1 and lower limb amputations cause structural, mechanical and metabolic changes, these changes being forms of adaptation to new body condition. 2 Some metabolic alterations are more scientifically investigated due to their physiological impact, such as metabolic expenditure (use of energy to perform activities or exercise work), oxygen consumption and anaerobic and aerobic thresholds, considering that these variables undergo general and specific modifications, being related to the use of auxiliary mechanisms, prostheses and their compositions. It is known that transfemoral amputees present the need to adapt to their new life condition, and the auxiliary devices require physical effort and increase in ventilation to perform their daily activities, which causes an increase in consumption and oxygen uptake, anaerobic threshold, heart rate, in order to maintain the static and dynamic balance. 3,4 When performing physical exercise, the human body makes changes in different body systems, being these: cardiovascular, hormonal, sanguineous, respiratory and skeletal muscle. 5,6The anaerobic threshold or anaerobic threshold (LA) is the determinant of the balance between lactate production and removal, i.e., the maximum intensity of exercise. Currently, this threshold has been increasingly studied to determine physical perfomance and ventilatory performance, since it presents the peak moment of the glycolytic pathway that causes alterations in the production of lactic acid, considering that studies of VO2 max are showing more and more inconsistency for the quantification of aerobic capacity, being gold standard only for aerobic power. In view of the greater consistency of information obtained through the anaerobic threshold, this has been used not only in scientific articles, but also for measurement Of physical performance, in order to compare according to the age group; For the creation of protocols of physical training and treatment for determination of loads that do not promote risk stress to the cardiovascular system; And to diagnose diseases, in view of the demonstration of failures or absence of oxygen supply. 8,9The LA has a direct interaction with the cardiovascular and respiratory systems, since, when reaching the maximum level of lactate accumulation and intensity in the metabolic and In the musculature, the activity of the autonomic nervous system increases significantly amplifying the parasympathetic and mainly, the sympathetic discharges, in which increases the capitation of oxygen Abstract Introduction: Transfemoral amputation causes cardiopulmonary, muscular and biomechanical changes that affect the physiology of physical exercise. The anaerobic threshold is one of the main indicators of the cardiopulmonary test (CPET), since it is the determinant of the balance between production and lactate removal, that is, the maximum intensity of exercise, thus determining the p...

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“…Antes da avaliação, as voluntárias foram submetidas aos seguintes procedimentos em relação à escala de BORG 6 : foram apresentadas a cada item da escala de Borg (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) …”

Section: Percepção Subjetiva De Esforço (Pse)unclassified

Respostas da percepção subjetiva de esforço em teste incremental de mulheres idosas sedentárias

Vieira

Madrid

Pires

et al. 2013

Rev. Bras. Cineantropom. Desempenho Hum.

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Resumo -Apesar da percepção subjetiva de esforço (PSE) ser utilizada para a avaliação e prescrição de exercícios em idosos, alguns indivíduos podem apresentar dificuldades de entendimento a escala de Borg. Nesse sentido, o objetivo do estudo foi verificar se mulheres idosas percebem, associam e relatam alterações no esforço físico por meio da PSE, em resposta a um teste de esforço máximo, bem como se é possível predizer o ponto de compensação respiratória (PCR) pela escala de Borg. Vinte e seis mulheres idosas realizaram uma avaliação de esforço máximo em esteira com análise ergoespirométrica, eletrocardiográfica e PSE em protocolo de rampa. As respostas de PSE entre diferentes zonas de intensidade baixa, moderada e alta foram consideradas para avaliar a percepção, associação e relato de alterações no esforço. Oito voluntárias (30,77%) não perceberam, associaram e relataram alterações no esforço por meio da PSE. Naquelas que perceberam, associaram e relataram alterações no esforço, o percentual da potência máxima no momento da PSE 13 (69,92 ± 10,30) e 14 (78,90 ± 11,00) não diferiu significativamente do momento do PCR (75,45 ± 9,65). Por fim, conclui-se que mulheres idosas podem apresentar dificuldades em perceber, associar e relatar alterações no esforço por meio da escala de Borg. Contudo, naquelas que percebem, associam e relatam alterações no esforço por meio da escala de Borg, as PSE 13 e 14 coincidem com o PCR. Palavras-chave: Envelhecimento; Esforço físico; Teste de esforço. of RPE 13 (69.92 ± 10,30) and 14 (78.90 ± 11,00) did not differ significantly from the one at the moment of RCP (75.45 ± 9.65 Abstract -Although the rating of perceived exertion (RPE) is used in the evaluation

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Comparação entre limiar anaeróbio determinado por variáveis ventilatórias e pela resposta do lactato sanguíneo em ciclistas

Cited by 13 publications

References 40 publications

Type 1 diabetes does not impair the physical capacity of non-sedentary adolescents

Type 1 diabetes does not impair the physical capacity of non-sedentary adolescents

Comparison of Different Methods to Determine the Anaerobic Threshold of Transfemoral Amputees Using Prosthesis

Respostas da percepção subjetiva de esforço em teste incremental de mulheres idosas sedentárias

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