Respostas hormonais e metabólicas durante sessão de exercício resistido
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Data
2012-09-27
Autores
Silva Júnior, Autran José da [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O exercício resistido desperta bastante interesse devido à magnitude de suas respostas metabólicas, hormonais e também com o gasto calórico total. Objetivos: estudar o comportamento da lactacidemia e parâmetros gasométricos arterializado através de uma técnica pouco invasiva (aparelho Abbott i-STAT Portable Clinical Analyser); estudar os ajustes hormonais (cortisol, GH e insulina) e quantificar o gasto calórico total durante exercício de leg press (LP) e supino reto (SR). Métodos: 10 estudantes do curso de educação física da UFSCar, idade 20,3 ± 4,2 anos, estatura 177,2 ± 4,6 cm, peso corporal de 74 ± 10 kg e IMC 23,8 ± 3,2 kg/m2 realizaram 4 séries de 10 repetições a 70% de 1RM com 3 minutos de intervalo em LP e SR. Foram analisados lactacidemia e escalas subjetiva de esforço (Borg e Omni) em repouso (Pré) e ao final de cada série. Os parâmetros gasométricos arterializados (paO2, paCO2, pH, HCO3 - e BE) foram analisados Pré e imediatamente após o término do esforço (Rec. 0’). Os hormônios cortisol, GH e insulina foram analisados em Pré e em diferentes momentos durante a recuperação (Rec.0’, Rec. 30’ e Rec. 90’). Os parâmetros ventilatórios (VO2, CO2 e VE) foram analisados durante toda a sessão. Resultados: Ocorreram elevações (P<0,05) nas concentrações médias (±DP entre Pré e 4a série) de lactato sanguíneo (LP 1,4±1,9mmol/l para 6,6±1,5mmol/l e SR 1,1±0,5mmol/l para 6,5±1,3 mmol/l); Borg (LP 10,6±2,2 para 15,5±2,1 e SR 9,7±2,3 para 15,1±1,9); Omni (LP 3,6±1,8 para 6,8±2,4 e SR 3,0±1,4 para 7,5±1,5) e paO2 (LP 80,5±6,4mmHg para 94,5±5,3mmHg e SR 80,5±6,4mmHg para 84,7±8,6mmHg). E reduções (P<0,05) em pH (LP e SR de 7,5 para 7,4); paCO2 (LP 34,1±3,1mmHg para 33±8,8mmHg e SR 34,1±3,1 mmHg para 32,3±3,1mmHg); HCO3 - (LP 27,7±1,5mmol/l para 19,5±2,9mmol/l e SR 27,7±1,5mmol/l...
Resistance exercise arouses great interest because of the magnitude of their responses metabolic, hormonal, and also with the total caloric expenditure. Objectives: To study the behavior of lactate and arterial blood gas parameters through a minimally invasive technique (Abbott i-STAT Portable Clinical Analyzer), to study the adjustments hormone (cortisol, GH and insulin) and quantify the energy expenditure total during exercise leg press (LP) and bench press (BP). Methods: 10 students of physical education UFSCar, age 20.3 ± 4.2 years, height 177.2 ± 4.6 cm, weight 74 ± 10 kg and BMI 23.8 ± 3.2 kg/m2 performed 4 sets of 10 repetitions at 70% 1RM with 3 minutes apart in LP and SR. Were analyzed blood lactate and ratings of perceived exertion (Borg and Omni) at rest (Pre) and at the end of each set. Arterial gasometric parameters (PaO2, PaCO2, pH, HCO3 - and BE) were analyzed pre and immediately after the exercise (Rec 0'). Hormones cortisol, GH, and insulin were analyzed at different times pre-and during recovery (Rec.0', Rec 30' and Rec 90'). The ventilatory parameters (VO2, CO2 and VE) were measured throughout the session. Results: There were increases (P<0.05) in mean (± SD between Pre and 4th set) concentrations blood lactate (LP 1.4±1.9mmol/l to 6.6±1.5mmol/l and BP 1.1±0.5mmol/l to 6.5±1.3 mmol/l), Borg (LP 10.6±2.2 to 15.5±2.1 and BP 9.7±2.3 for 15.1±1.9), Omni (LP 3.6±1.8 to 6.8±2.4 and BP 3.0±1.4 to 7.5±1.5) and paO2 (LP 80.5±6.4 mmHg to 94.5±5.3mmHg and BP 80.5±6.4mmHg to 84.7±8.6mmHg). And reductions (P<0.05) in pH (LP and BP from 7.5 to 7.4), PaCO2 (LP 34.1±3.1mmHg to 33±8.8 mmHg and BP 34.1±3.1 to 32.3±3.1 mmHg); HCO3- (LP 27.7±1.5mmol/l to 19.5±2.9mmol/l and BP 27.7±1.5mmol/l to 20.7±3,0mmol/l) and BE (LP 4.8 to- 5.3 and BP 4.8 to -4.0), with no difference between LP and BP. Cortisol... (Complete abstract click electronic access below)
Resistance exercise arouses great interest because of the magnitude of their responses metabolic, hormonal, and also with the total caloric expenditure. Objectives: To study the behavior of lactate and arterial blood gas parameters through a minimally invasive technique (Abbott i-STAT Portable Clinical Analyzer), to study the adjustments hormone (cortisol, GH and insulin) and quantify the energy expenditure total during exercise leg press (LP) and bench press (BP). Methods: 10 students of physical education UFSCar, age 20.3 ± 4.2 years, height 177.2 ± 4.6 cm, weight 74 ± 10 kg and BMI 23.8 ± 3.2 kg/m2 performed 4 sets of 10 repetitions at 70% 1RM with 3 minutes apart in LP and SR. Were analyzed blood lactate and ratings of perceived exertion (Borg and Omni) at rest (Pre) and at the end of each set. Arterial gasometric parameters (PaO2, PaCO2, pH, HCO3 - and BE) were analyzed pre and immediately after the exercise (Rec 0'). Hormones cortisol, GH, and insulin were analyzed at different times pre-and during recovery (Rec.0', Rec 30' and Rec 90'). The ventilatory parameters (VO2, CO2 and VE) were measured throughout the session. Results: There were increases (P<0.05) in mean (± SD between Pre and 4th set) concentrations blood lactate (LP 1.4±1.9mmol/l to 6.6±1.5mmol/l and BP 1.1±0.5mmol/l to 6.5±1.3 mmol/l), Borg (LP 10.6±2.2 to 15.5±2.1 and BP 9.7±2.3 for 15.1±1.9), Omni (LP 3.6±1.8 to 6.8±2.4 and BP 3.0±1.4 to 7.5±1.5) and paO2 (LP 80.5±6.4 mmHg to 94.5±5.3mmHg and BP 80.5±6.4mmHg to 84.7±8.6mmHg). And reductions (P<0.05) in pH (LP and BP from 7.5 to 7.4), PaCO2 (LP 34.1±3.1mmHg to 33±8.8 mmHg and BP 34.1±3.1 to 32.3±3.1 mmHg); HCO3- (LP 27.7±1.5mmol/l to 19.5±2.9mmol/l and BP 27.7±1.5mmol/l to 20.7±3,0mmol/l) and BE (LP 4.8 to- 5.3 and BP 4.8 to -4.0), with no difference between LP and BP. Cortisol... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Physiology, Exercicios fisicos - Aspectos fisiologicos, Gasometria, Hormonios, Acido latico
Como citar
SILVA JÚNIOR, Autran José da. Respostas hormonais e metabólicas durante sessão de exercício resistido. 2012. 109 f. Tese - (doutorado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2012.