Respostas fisiológicas e perceptuais obtidas durante a caminhada em ritmo autosselecionado por mulheres com diferentes índices de massa corporal

Abstract

RESUMoAs respostas fisiológicas e perceptuais verificadas durante a caminhada vêm sendo amplamente pesquisadas; contudo, poucas investigações buscaram comparar essas respostas em grupos de diferentes índices de massa corporal durante caminhada em ritmo autosselecionado. O objetivo do presente estudo foi comparar as respostas fisiológicas e perceptuais entre mulheres com peso normal (PN), sobrepeso (SP) e obesas (OB) durante a caminhada em ritmo autosselecionado. Participaram 66 mulheres sedentárias, com idade entre 20 e 45 anos, designadas em três grupos de acordo com o seu índice de massa corporal: (i) PN (18,5 -24,9kg•m -2 , n = 22); (ii) SP (25,0 -29,9kg•m -2 , n = 22); e (iii) OB (≥ 30,0kg•m -2 , n = 22). Cada participante realizou uma sessão de familiarização e duas sessões experimentais (teste incremental máximo e teste de 20 minutos de caminhada em ritmo autosselecionado), a fim de determinar as respostas fisiológicas (frequência cardíaca, FC; e consumo de oxigênio, VO 2 ) e perceptuais (percepção subjetiva de esforço, PSE) de cada sessão. A ANOVA one-way foi empregada para comparar as respostas fisiológicas e perceptuais obtidas durante a caminhada em ritmo autosselecionado entre os três protocolos experimentais, empregando-se o teste post hoc de Tukey com p < 0,05. Embora os sujeitos com obesidade tenham registrado menor velocidade de caminhada (1,30 ± 0,13m•s -1 ) comparativamente aos com peso normal e sobrepeso (1,69 ± 0,11 e 1,58 ± 0,22m•s -1 , respectivamente) (p < 0,05), eles apresentaram similar resposta fisiológica (58,7 ± 8,6; 63,1 ± 12,6; 64,8 ± 11,1 %VO 2 e 75,1 ± 7,8; 78,8 ± 8,5; 78,7 ± 7,2 %FC max , para os grupos normal, sobrepeso e obeso, respectivamente). Além disso, as respostas perceptuais também não diferiram entre os grupos experimentais (11,6 ± 1,6; 11,7 ± 1,6; 12,2 ± 1,8, respectivamente). Desse modo, pode-se concluir que, independente do IMC, mulheres adultas apresentam respostas fisiológicas e perceptuais similares durante caminhada em ritmo autosselecionado, mesmo caminhando em velocidades diferentes. , n = 22). Each participant performed a familiarization session and two experimental sessions (maximal incremental test and 20m-walking test in self-selected rhythm) to determine the physiological (heart rate -HR and oxygen consumption -O 2 ) and perceived responses (perceived exertion -PE) of each session. One-way ANOVA was applied to compare the physiological and perceived responses obtained during gait in self-selected rhythm among the three experimental protocols, applying the Tukey's post hoc test with p < 0.05. Although the obese subjects have registered lower walking velocity (1.30 ± 0.13m•s , respectively) (p < 0.05), they presented similar physiological response ((58.7 ± 8.6; 63.1 ± 12.6; 64.8 ± 11.1 %O 2 and 75.1 ± 7.8; 78.8 ± 8.5; 78.7 ± 7.2 %HR max , for the normative, overweighed and obese groups, respectively). Moreover, the perceived responses did not differ between experimental groups (11.6 ± 1.6; 11.7 ± 1.6; 12.2 ± 1.8, respectively). Therefore, it c...

Respostas cardiopulmonares agudas de mulheres no treinamento de força

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“…In other words, exercise performed at 73.8 ± 9.2% of maximal heart rate produced pleasurable sensations; however, an improvement in maximal oxygen uptake was not established 26 . Accordingly, Elsangedy et al 28 verified the self-selection method for different BMIs and observed that overweight, obese and normal weight individuals selected intensities that were below ventilatory threshold (<55% of VO 2 max). For obese individuals, the average speed was 4.68 km / h in a twenty minute walk and the sensation was pleasurable.…”

Can Transcranial Direct Current Stimulation Modulate Psychophysiological Response in Sedentary Men during Vigorous Aerobic Exercise?

“…Thus, since left insular cortex is related to both pleasant sensations and parasympathetic activity, it is reasonable to speculate that strategies that increase the activity of this area during exercise may improve affective responses and parasympathetic modulation. Therefore, this strategy would enhance adherence to exercise programs and increase cardiovascular benefits associated to exercise, due to the improvements of affective responses [8], and the increased parasympathetic activity [18], respectively.…”