respostas fisiológicas e perceptuais obtidas durante a caminhada em ritmo autosselecionado por mulheres com diferentes índices de massa corporal physiological and perceived responses obtained during gait in self-selected rhythm by women with different body mass indices
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2009
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Abstract
As 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, VO2) 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 %VO2 e 75,1 ± 7,8; 78,8 ± 8,5; 78,7 ± 7,2 %FCmax, 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.
Physiological and perceived responses verified during gait have been widely studied; however, few investigations have tried to compare these responses in groups of different body mass indices during gait in self-selected rhythm. The aim of the present study was to compare the physiological and perceived responses among normative (N), overweighed (OW) and obese (OB) women during gait in self-selected rhythm. Sixty-six sedentary women, aged between 20 and 45 years and divided in three groups according to their body mass indices participated in the study: (i) N (18.5 - 24.9kg·m-2, n = 22); (ii) OW (25.0 - 29.9kg·m-2, n = 22) and (iii) OB (> 30.0kg·m-2, 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 - O2) 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-1) compared with the normative and overweighed ones (1.69 ± 0.11 and 1.58 ± 0.22m·s-1, respectively) (p < 0.05), they presented similar physiological response ((58.7 ± 8.6; 63.1 ± 12.6; 64.8 ± 11.1 %O2 and 75.1 ± 7.8; 78.8 ± 8.5; 78.7 ± 7.2 %HRmax, 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 can be concluded that regardless of the BMI, adult women present similar physiological and perceived responses during gait in self-selected rhythm even when walking in different velocities.
Physiological and perceived responses verified during gait have been widely studied; however, few investigations have tried to compare these responses in groups of different body mass indices during gait in self-selected rhythm. The aim of the present study was to compare the physiological and perceived responses among normative (N), overweighed (OW) and obese (OB) women during gait in self-selected rhythm. Sixty-six sedentary women, aged between 20 and 45 years and divided in three groups according to their body mass indices participated in the study: (i) N (18.5 - 24.9kg·m-2, n = 22); (ii) OW (25.0 - 29.9kg·m-2, n = 22) and (iii) OB (> 30.0kg·m-2, 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 - O2) 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-1) compared with the normative and overweighed ones (1.69 ± 0.11 and 1.58 ± 0.22m·s-1, respectively) (p < 0.05), they presented similar physiological response ((58.7 ± 8.6; 63.1 ± 12.6; 64.8 ± 11.1 %O2 and 75.1 ± 7.8; 78.8 ± 8.5; 78.7 ± 7.2 %HRmax, 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 can be concluded that regardless of the BMI, adult women present similar physiological and perceived responses during gait in self-selected rhythm even when walking in different velocities.
| Reference Key |
elsangedy2009revistarespostas
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| Authors | ;Hassan M. Elsangedy;Kleverton Krinski;Cosme F. Buzzachera;Renan F. H. Nunes;Flavia A. M. Almeida;Carlo Baldari;Laura Guidetti;Wagner de Campos;Sergio G. da Silva |
| Journal | research disclosure |
| Year | 2009 |
| DOI |
10.1590/S1517-86922009000500011
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| URL | |
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