Oxygen Uptakes Adjusted for Body Composition in Normal‐Weight and Obese Adolescents

Ekelund, Ulf; Franks, Paul W.; Wareham, Nicolas J.; Åman, Jan

doi:10.1038/oby.2004.58

Cited by 82 publications

(98 citation statements)

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“…No entanto, outras pesquisas observaram semelhanças na FC max obtidas em adolescentes obesos e não obesos, tanto na esteira (17)(18)(19) , como na bicicleta ergométrica (5) . No presente estudo, não foram encontradas diferenças significativas nas respostas fisiológicas da FC max entre os grupos obesos e não obesos em ambos os ergômetros.…”

Section: Meninos Meninasunclassified

“…O VO 2max em valores absolutos está relacionado diretamente com o tamanho corporal; dessa forma, pesquisas relatam maiores valores em adolescentes obesos do que nos não obesos (5,16,19) ; outros encontraram valores semelhantes entre os grupos (17,27) . Segundo Ekelund et al (2004) (19) , o fato de o indivíduo obeso apresentar valores de VO 2max absoluto mais elevados ou semelhantes aos dos não obesos indica capacidade funcional preservada, pois a equação de Fick (que relaciona o oxigênio bombeado pelo coração e o captado pelo tecidos) revela que o coração parece fornecer oferta adequada de oxigênio para o tecido muscular.…”

Section: Meninos Meninasunclassified

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Comparação das variáveis cardiorrespiratórias de adolescentes obesos e não obesos em esteira e bicicleta ergométrica

Milano

Leite

2009

Rev Bras Med Esporte

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RESUMoO objetivo deste estudo foi investigar o consumo máximo de oxigênio (VO 2max ) em adolescentes obesos e não obesos em esteira e bicicleta ergométrica. O estudo foi transversal e descritivo com a amostra de 54 indivíduos obesos (23 meninos e 31 meninas) e 33 não obesos (16 meninos e 17 meninas) com idade entre 10 e 16 anos. Utilizou-se o critério dos Centers for Disease Control and Prevention (CDC, 2000) para a classificação do índice de massa corporal (IMC). Foram avaliados o peso, estatura, índice de massa corporal (IMC) e IMC-escore Z. Para avaliação cardiorrespiratória foi realizado teste máximo em esteira e bicicleta ergométrica. Foram avaliados a frequência cardíaca máxima (FC max ), coeficiente respiratório (RER), consumo máximo de oxigênio (VO 2max ), tempo total de teste (TT) e carga final (w) na bicicleta ergométrica. Utilizou-se o teste de t de Student para a comparação dos ergômetros. Nas análises dos grupos, utilizou-se a ANOVA fatorial. Considerou-se significante p < 0,05. Os resultados revelaram que o peso, IMC e IMC-escore Z foram maiores nos obesos. Os valores de VO 2max absoluto (l.min -1 ) foram mais altos nos obesos, em ambos os gêneros, na esteira, sem diferenças entre os grupos na bicicleta. Entretanto, o VO 2max relativo ao peso corporal (ml.kg -1 .min -1 ) foi menor no grupo obeso e nas meninas, em ambos os ergômetros. A carga de trabalho na bicicleta foi similar entre os obesos e não obesos. Concluiu-se que os obesos apresentaram valores de VO 2max mais baixos que os não obesos em ambos os ergômetros. Entretanto, o fato de o indivíduo obeso na bicicleta suportar a mesma carga final que o não obeso sugere-se que a bicicleta pode ser indicado como o melhor ergômetro para obesos.Palavras-chave: obesidade, VO 2max , ergômetros. aBStRaCtThe aim of this study was to investigate the oxygen maximal uptake (VO 2max ) in obese and non-obese adolescents on treadmill and ergometric bicycle. The study was transversal and descriptive with a sample of 54 obese individuals (23 boys and 31 girls) and 33 non-obese individuals (16 boys and 17 girls), mean age of 10-16 years. The criterion by the Centers for Disease Control and Prevention (CDC, 2000) was used for classification of body mass index (BMI). Weight, height, body mass index (BMI) and BMI-score Z were assessed. A maximal test on treadmill and ergometric bicycle was performed for cardiorespiratory assessment. Maximum heart rate (HR max ), respiratory coefficient (REC), maximal oxygen uptake (VO 2max ), test total time (TT) and final load (w) on ergometric bicycle were assessed. Student' s t-test was used for ergometers comparison. Factorial ANOVA was used in the groups' analysis and p< 0.05 was considered significant. The results revealed that weight, BMI and BMI-score Z were higher in the obese subjects. The absolute VO 2max (m1 -1 ) values were higher in the obese subjects in both genders on treadmill, with no differences between the bicycle group. However, the VO 2max concerned with body weight (m1kg -1 min -1 ) was lower in the obese grou...

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Section: Meninos Meninasunclassified

Comparação das variáveis cardiorrespiratórias de adolescentes obesos e não obesos em esteira e bicicleta ergométrica

Milano

Leite

2009

Rev Bras Med Esporte

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“…25,26 Resting metabolic rate (RMR) was measured by indirect calorimetry in the morning after an overnight fast and after 30 min of supine rest. Resting metabolic rate was calculated according to De and Weir.…”

Section: Subjectsmentioning

confidence: 99%

“…Maximal aerobic capacity (VO 2max ) was measured by indirect calorimetry during an incremental exercise protocol to exhaustion as previously described. 26 Movement economy during the submaximal exercise was calculated as oxygen uptake per kilogram of BW (mlO 2 kg À1 min À1 ).…”

Section: Subjectsmentioning

confidence: 99%

“…25,26 Briefly, height, BW, waist to hip circumference and skinfold measurements were collected by the same researcher at baseline and 'follow up'. Fat mass, fat free mass (FFM) and bone mineral content was measured by dual-energy X-ray absorptiometry with a Lunar DPX-L densitometer (Lunar Corp, Madison, WI, USA) at baseline and 'follow up'.…”

Section: Anthropometry and Body Compositionmentioning

confidence: 99%

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Does physical activity equally predict gain in fat mass among obese and nonobese young adults?

et al. 2006

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Background: Differences in energy metabolism and physical activity (PA) may contribute to the long-term regulation of body weight (BW). Objective: To examine the associations between metabolic determinants, energy expenditure and objectively measured components of PA with change in BW and fat mass (FM). Design: Prospective (4 years.), case-control study in obese (n ¼ 13) and normal weight (n ¼ 15) young adults. Measurements: At baseline, we measured resting metabolic rate, substrate oxidation, movement economy (ml O 2 kg À1 min À1 ), aerobic fitness (VO 2max ), total and PA energy expenditure by doubly labelled water, and PA by accelerometry. Fat mass was measured by DXA. At follow-up we repeated our measurements of PA and FM. Results: Fat mass increased significantly (Po0.001) in both groups. Physical activity did not change between baseline and 'follow up'. Change in overall PA (counts per minute) was inversely associated with change in BW and (b ¼ À0.0124, P ¼ 0.054) and FM (b ¼ À0.008, P ¼ 0.04). Post hoc analyses suggested that this association was explained by changes in the normal weight group only (b ¼ À0.01; P ¼ 0.008; and b ¼ À0.0097; P ¼ 0.009, for BW and FM, respectively). Metabolic determinants, energy expenditure estimates and subcomponents of PA (i.e. time spent at different intensity levels) were not significantly associated with change in BW or FM. Conclusion: Our results suggest an independent association between PA and FM. However, this association may differ depending on obesity status. The gain in FM, without any change in PA, may suggest that dietary intake is the major contributor to the positive energy balance.

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Cardiovascular fitness in adolescents: The influence of sexual maturation status—The AVENA and EYHS studies

Ortega

Ruiz

Mesa

et al. 2007

American J Hum Biol

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The purposes were: (1) to determine the influence of sexual maturation status and body composition by comparing cardiovascular fitness (CVF) level in two adolescent populations from the south and the north of Europe; (2) to describe the associations between CVF and sexual maturation status in adolescence. A total of 1,867 Spanish adolescents from the AVENA study and 472 from the Swedish part of the EYHS were selected for this report (aged 14-16 years). CVF (expressed by the maximal oxygen consumption) was estimated from 20 m shuttle run test in the AVENA study and from a maximal ergometer cycle test in the EYHS. Sexual maturation status was classified according to Tanner stages. Body fat percentage (BF%) was estimated from skinfold thicknesses. Expressing CVF in different ways (in absolute value and in relation to weight or fat free mass; FFM) resulted in two different results with regard to CVF interpretation and comparison between the study populations. A higher CVF, as expressed in relation to FFM, was observed in the Spanish when compared to Swedish adolescents (P = 0.001). However, after adjusting for both sexual maturation status and BF%, the difference disappeared in males, while it remained significant in females (P = 0.001). CVF was negatively associated with sexual maturation status in males (P = 0.001). However, after adjusting for BF%, the association disappeared in males, while it was significant in females (P = 0.05). These results suggest that for CVF comparisons and interpretation in adolescent populations, sexual maturation status and BF%, as well as the way to express the CVF, should be taken into account.

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Oxygen Uptakes Adjusted for Body Composition in Normal‐Weight and Obese Adolescents

Cited by 82 publications

References 30 publications

Comparação das variáveis cardiorrespiratórias de adolescentes obesos e não obesos em esteira e bicicleta ergométrica

Comparação das variáveis cardiorrespiratórias de adolescentes obesos e não obesos em esteira e bicicleta ergométrica

Does physical activity equally predict gain in fat mass among obese and nonobese young adults?

Cardiovascular fitness in adolescents: The influence of sexual maturation status—The AVENA and EYHS studies

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