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Authors
Abstract(s)
O motocross é uma modalidade dos desportos motorizados off-road, disputada em
terrenos de chão duro ou areia, com diversos obstáculos ao longo da pista. O presente
trabalho teve como objetivo comparar as respostas de carga interna e carga externa de
pilotos de motocross de diferentes classes e em circuitos de tipologia distinta. A
amostra foi constituída por dez pilotos (28,10±7,53 anos;74,60±9,70 kg;176,50±7,18
cm;23,88±2,18 IMC) das classes Mx Elite e Mx Hobby, participantes no Regional
Pentacontrol Mx. Os pilotos foram avaliados durante os treinos cronometrados em dois
circuitos distintos, com distâncias de 1600 metros e com motas 250cc e 450cc a dois e
quatro tempos. Foram analisados indicadores de carga interna (frequência cardíaca,
perceção subjetiva de esforço e lactato) e carga externa (velocidade, acelerações,
desacelerações e impactos). Os resultados revelaram uma tendência para respostas
mais elevadas de carga interna na classe Mx Hobby comparativamente à classe Mx
Elite. Relativamente às respostas de carga externa a classe Mx Hobby apresentou
valores mais elevados de velocidade máxima e média, enquanto a classe Mx Elite
registou valores mais altos de acelerações e desacelerações. Na comparação efetuada
entre circuitos, uma tendência para valores mais elevados de carga interna para ambas
as classes foi identificada no circuito 1, com exceção da frequência cardíaca na classe
Mx Hobby onde valores mais elevados foram encontrados no circuito 2. Relativamente
à carga externa o circuito 2 pareceu induzir respostas mais elevadas em todas as
variáveis analisadas com exceção dos impactos, em ambas as classes.
Motocross is a form of off-road motor sports, played on terrain hard land or sand, with various obstacles along the track. The present paper investigated differences in responses of internal load and external load in different classes and in circuits of different tipology. The sample consisted of ten pilots (28.10±7.53 years;74,60±9,70 kg;176,50±7,18 cm;23,88±2,18 IMC) from Mx Elite and Mx Hobby classes, participants in the Regional Pentacontrol Mx. The participants were evaluated during timed training on two different circuits, with distances of 1600 meters and with 250cc and 450cc two-stroke and four-stroke motorcycles. We analyzed indicators of internal load (heart rate, subjective perception of effort and lactate) and external load (speed, accelerations, decelerations and impacts). The results reveal a tendency for higher internal load responses in the Mx Hobby class compared to the Mx Elite class. Regarding the external load responses, the Mx Hobby class presents higher values for maximum and average speed, while the Mx Elite class registers higher values for accelerations and decelerations. In the comparison made between circuits, a trend towards higher values of internal load for both classes was identified on circuit 1, with the exception of heart rate in the Mx Hobby class where higher values were found on circuit 2. Regarding the external load, circuit 2 seems to induce higher responses in all the variables analyzed with the exception of impacts in both classes.
Motocross is a form of off-road motor sports, played on terrain hard land or sand, with various obstacles along the track. The present paper investigated differences in responses of internal load and external load in different classes and in circuits of different tipology. The sample consisted of ten pilots (28.10±7.53 years;74,60±9,70 kg;176,50±7,18 cm;23,88±2,18 IMC) from Mx Elite and Mx Hobby classes, participants in the Regional Pentacontrol Mx. The participants were evaluated during timed training on two different circuits, with distances of 1600 meters and with 250cc and 450cc two-stroke and four-stroke motorcycles. We analyzed indicators of internal load (heart rate, subjective perception of effort and lactate) and external load (speed, accelerations, decelerations and impacts). The results reveal a tendency for higher internal load responses in the Mx Hobby class compared to the Mx Elite class. Regarding the external load responses, the Mx Hobby class presents higher values for maximum and average speed, while the Mx Elite class registers higher values for accelerations and decelerations. In the comparison made between circuits, a trend towards higher values of internal load for both classes was identified on circuit 1, with the exception of heart rate in the Mx Hobby class where higher values were found on circuit 2. Regarding the external load, circuit 2 seems to induce higher responses in all the variables analyzed with the exception of impacts in both classes.
Description
Keywords
Carga Externa Carga Interna Circuito Motocross Performance