Relações cineantropométricas e fisiológicas durante exercício incremental em esteira rolante

Abstract

RESUMOTestes incrementais em esteira rolante são muito utilizados para prescrição de treinamentos, havendo alterações fisiológicas e cinemáticas devido à natureza de incremento da intensidade do exercício. Contudo, a antropometria é um fator que não apresenta consenso na literatura. [GLI] antes do teste incremental (1,94 ± 0,4mmol/L e 94,3 ± 7mg/dL, respectivamente) foram significantemente menores que os valores encontrados após o teste incremental (9,51 ± 2,7mmol/L e 126 ± 16mg/ dL, respectivamente). Além disso, verificou-se aumento significante e gradativo da AP e FP ao longo do teste incremental. Correlações inversas e significantes (p < 0,05) foram encontradas entre a [LAC] e altura, massa corporal e o nível de treinamento dos voluntários. Conclui-se que a execução do teste incremental altera parâmetros cinemáticos (pela necessidade de deslocamento mais rápido) e fisiológicos (processo de fadiga muscular, em decorrência do aumento da velocidade). Além disso, voluntários menores e mais leves podem apresentar maiores concentrações de metabólitos.Palavras-chave: fadiga muscular, corrida, teste incremental, cinemática. ABSTRACTIncremental treadmill tests are widely used for prescription of aerobic and anaerobic training. Physiological and kinematics parameters are changed by the progressive nature of this activity. However, there is no consensus on how anthropometric characteristics may affect the incremental test performance. Therefore, the aims of this study were (1) to verify the effects of the incremental treadmill test on the blood lactate concentration ([LAC]), glucose concentration ([GLU]), step frequency (SF) and step length (SL), and (2) to correlate anthropometric data (body mass, height, %body fat) to changes in [LAC] and [GLU]. Thirteen healthy males volunteered to this study and performed an incremental running test on a treadmill (start: 8 km/h, with progressive increases [1 km/h] at each three minute until exhaustion).[LAC] and [GLU] were registered before and 3 min after the incremental test performance. SF and SL were registered for each running speed by digital images at the sagital plane. As results, we verified that [LAC] and [GLU] before the incremental test (1.94 ± 0.4 mmol/L and 94.3 ± 7 mg/dL, respectively) were significantly lower (p < 0.05) than after the incremental test (9.51 ± 2.7 mmol/L and 126 ± 16. mg/dL, respectively). In addition, SF and SL presented significant increase (p < 0.05) throughout the incremental test.[LAC] presented inverse and significant correlations (p < 0.05) to height and body mass. Thus, an incremental treadmill running test affects kinematic (SF and SL) and physiological conditions (muscular fatigue, as consequence of the speed increase). Besides this, shorter and lighter subjects may present higher metabolite concentrations after this type of test.

Parkour: Mensuração Do Metabolismo Energético E Morfofisiológico De Seus Praticantes

“…Gómez-Landero et al 18 , pesquisaram atletas espanhóis masculinos energia para que a atividade consiga ser realizada. Um dos mecanismos dessa manutenção é a utilização da glicose 28 . Durante o exercício ocorre aumento da fosforilação de proteínas relacionadas à captação de glicose pelo músculo esquelético, resultando em uma maior quantidade de GLUT4 transportados para a membrana celular, com consequente aumento na captação de glicose pelo músculo ativo 29 .…”

Cardiovascular responses induced by acute video game boxing performance in healthy women

“…Muscle fatigue is a common phenomenon in endurance sports and may be experienced in usual daily activities. The factors involved in this process include two categories: central (fatigue caused by disorder of neuromuscular transmission in the central nervous system and muscle membrane) and peripheral (changes within the muscular system) 5,6 . Exercise induces a significant increase in plasma lactate concentration, depending on its intensity.…”

“…The lactate clearance rate has a direct linear relationship with the excess post-exercise oxygen consumption (PEOC), suggesting a contribution to the slow component of PEOC 4 . Previous studies proposed the lactate threshold as an invasive gold standard and widely recommended parameters in the assessment, prescription and monitoring of exercise programs, especially for aerobic exercise 5 . Virtual exercise programs through video game performance have played an important role in achieving the goals of increasing the joy of physical activity performance, starting in childhood, and enabling the concept of health 7 .…”