Reliability and Validity of a Portable Metabolic Measurement System

Melanson, Edward L.; Freedson, Patty S.; Hendelman, D.; Debold, Edward P.

doi:10.1139/h96-010

Cited by 39 publications

(18 citation statements)

References 13 publications

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“…The velocity attained during the last completed stage was determined as the subject's VIFT. Respiratory gas exchanges were measured with an automated portable metabolic system (VO2000; Medgraphics, St. Paul, MN) (34). Before each test, the O2 and CO2 analysis systems were calibrated.…”

Section: Experimental Designmentioning

confidence: 99%

Parasympathetic reactivation after repeated sprint exercise

Buchheit

Laursen²,

Ahmaidi³

2007

American Journal of Physiology-Heart and Circulatory Physiology

226

301

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Buchheit M, Laursen PB, Ahmaidi S. Parasympathetic reactivation after repeated sprint exercise. Am J Physiol Heart Circ Physiol 293: H133-H141, 2007. First published March 2, 2007; doi:10.1152/ajpheart.00062.2007.-The purpose of this study was to examine the effects of muscular power engagement, anaerobic participation, aerobic power level, and energy expenditure on postexercise parasympathetic reactivation. We compared the response of heart rate (HR) after repeated sprinting with that of exercise sessions of comparable net energy expenditure and anaerobic energy contribution. Fifteen moderately trained athletes performed 1) 18 maximal all-out 15-m sprints interspersed with 17 s of passive recovery (RS), 2) a moderate isocaloric continuous exercise session (MC) at a level of mean oxygen uptake similar to that of the RS trial, and 3) a high-intensity intermittent exercise session (HI) conducted at a level of anaerobic energy expenditure similar to that of the RS trial. Subjects were immediately seated after the exercise trials, and beatto-beat HR was recorded for 10 min. Parasympathetic reactivation was evaluated through 1) immediate postexercise HR recovery, 2) the time course of the root mean square for the successive R-R interval difference between successive 30-s segments (RMSSD30s) and 3) HR variability vagal-related indexes calculated for the last 5-min stationary period of recovery. RMSSD30s increased during the 10-min period after the MC trial, whereas RMSSD 30s remained depressed after both the RS and HI trials. Parasympathetic reactivation indexes were similar for the RS and HI trials but lower than for the MC trial (P Ͻ 0.001). When data of the three exercise trials were considered together, only anaerobic contribution was related to HR trial-derived indexes. Parasympathetic reactivation is highly impaired after RS exercise and appears to be mainly related to anaerobic process participation.heart rate recovery; vagal-related indexes; autonomic activity; sprint interval training REPEATED SPRINT (RS) training, characterized by recurring sessions of brief repeated bouts of supramaximal exercise, may be a time-efficient strategy for inducing metabolic adaptations in human skeletal muscle (15). Adaptations shown after a short time course of RS training include increased resting glycogen content (20), increased maximal activities of various enzymes involved in glycolytic (31) and oxidative energy provision (10,20), an increased H ϩ buffer capacity (17,20), and decreased cycling time-trial performance (10,15,20). As a result, RS training has been proposed as a viable alternative to classically prescribed submaximal endurance training (10,17,20).Today, there are growing social and psychological reasons to encourage RS training within clinical populations. First, RS training is remarkably time efficient and more compatible with the Western world's time-poor modern lifestyle. Second, the concept of RS training may also be more attractive than continuous exercise for sedentary individuals who have difficulty han...

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Section: Experimental Designmentioning

confidence: 99%

Parasympathetic reactivation after repeated sprint exercise

Buchheit

Laursen²,

Ahmaidi³

2007

American Journal of Physiology-Heart and Circulatory Physiology

226

301

View full text Add to dashboard Cite

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“…The minute ventilation (V E ) and the oxygen and carbon oxide expired fraction were continuously measured by means of open circuit indirect calorimetry (TEEM 100™ Total Metabolic Analysis System, Aerosport, Ann Arbor, Mich., USA) [17][18][19][20] . The subjects used a nose clip and a medium flow pneumotachometer (Hans Rudolph™, Kansas City, MO, USA).…”

Section: Group 1 (G-1) -mentioning

confidence: 99%

“…Simpler and cheaper ergospirometers were created for clinical and field investigation. Several studies validated the measurements of VO 2 , VCO 2 and V E by means of such clinical equipment [13][14][15][16][17][18][19] , however a few studies determined the quality of the derived measurements such as AT 20 .…”

mentioning

confidence: 99%

“…There are few studies related to the reliability of the metabolic analysis system of low cost, The 17 , the equipment was validated comparing it with a computerized reference system, and Pearson's correlation coefficients of 0.91 to 0.97 were found for V E and 0.88 to 0.97 for VO 2 . Wideman et al 19 found differences of 2% to 11% for VO 2 and 5% to 17% for VCO 2 in several intensities.…”

mentioning

confidence: 99%

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Precisão da medida do limiar anaeróbio por meio do calorímetro portátil

Nogueira¹,

Pompeu²

2010

Arq. Bras. Cardiol.

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“…Considerando a precisão de um dos equipamentos mais utilizados no Brasil (4)(5)(6)(7)(8) , bem como a relação custo-benefício de utilização das equações metabólicas sugeridas pelo American College of Sports Medicine (ACSM) (1) , justifica-se a utilização das equações preditivas como estratégia de estimativa do consumo de oxigênio (VO 2 ) em atividades físicas diversas, incluindo a estimativa do VO 2máx .…”

Section: Introductionunclassified

Comparação entre as modalidades de caminhada e corrida na predição do consumo máximo de oxigênio

Santos

Furtado²,

Ribeiro³

et al. 2008

Rev Bras Med Esporte

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Artigo originAl RESUMOOs testes ergométricos de exercício realizados em esteira podem ser desempenhados a partir das modalidades de caminhada e corrida, contudo, sem haver grandes elucidações ao comparar resultados de VO 2máx obtidos nessas possibilidades de teste. Com o intuito de responder a essa questão, o presente estudo objetivou comparar a predição do VO 2máx entre um protocolo escalonado máximo de caminhada e um de corrida, ambos elaborados de modo a proporcionar demandas metabólicas idênticas em cada estágio. Foram voluntários para o presente estudo 23 indivíduos (15 masculinos e oito femininos) com 27,7 ± 7,6 anos de idade, 73,0 ± 14,9kg de massa corporal, 170,0 ± 1,0cm de estatura, 19,3 ± 8,6% de gordura corporal, 24,7 ± 3,3kg⋅m -2 de índice de massa corporal e 44,1 ± 6,0mL⋅kg -1 ⋅min -1 de potência aeróbia máxima. Um teste t pareado não demonstrou diferenças significativas (p = 0,364; IC 95 % = -2,2 a 0,85) entre o protocolo de caminhada e o de corrida, apesar de a média dos valores do VO 2máx na corrida ter sido 2,4% superior (42,4 vs. 43,4mL⋅kg -1 ⋅min -1 ). Com base nos resultados encontrados, conclui-se que a administração de diferentes estratégias de protocolos em esteira (caminhada ou corrida) não influenciou significativamente a estimativa do VO 2max , não interferindo na posterior tomada de decisão para a prescrição do treinamento cardiorrespiratório.Palavras-chave: teste de exercício, teste em esteira, correndo, caminhando. ABSTRACTExercise tests carried out on treadmills may be performed by running or gait; however, there is no agreement concerning the comparison of the VO 2max results obtained in these tests. Thus, the aim of this study was to compare the VO 2max prediction between both a running and a gait maximum scaled protocol, elaborated to cause identical metabolic demands in each stage. Twenty three subjects volunteered for this study -(15 men and eight women) aged 27.7 ± 7.6 years, 73.0 ± 14.9 kg of body mass, 170.0 ± 1.0 cm of height, 19.3 ± 8.6 % of body fat, 24.7 ± 3.3 kg×m -2 of body mass index and 44.1 ± 6.0 mL×kg -1 ×min -1 of maximum aerobic power. A paired t-test did not show significant differences (p = 0.364; RI 95 % = -2.2 to 0.85) between the gait and the running protocols; however, the mean value for VO 2max at running was 2.4 % higher (42.4 vs. 43.4 mL×kg -1 ×min -1 ). Based on these results, we conclude that the administration of different protocols on treadmill (gait or running) did not significantly influence the VO 2max estimation, and hence did not interfere in the subsequent decision for the prescription of the cardiorespiratory training. Keywords INTRODUÇÃOA avaliação da aptidão física e das condições gerais de saúde tem sido recomendada como base para elaboração de programas de exercício de forma individualizada, segura e eficaz. A definição de quais parâmetros avaliar está vinculada ao próprio conceito de aptidão física em saúde, constituída pela composição corporal, força e resistência, flexibilidade e potência aeróbia (1) .Dentre esses parâmetros, a potênci...

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Reliability and Validity of a Portable Metabolic Measurement System

Cited by 39 publications

References 13 publications

Parasympathetic reactivation after repeated sprint exercise

Parasympathetic reactivation after repeated sprint exercise

Precisão da medida do limiar anaeróbio por meio do calorímetro portátil

Comparação entre as modalidades de caminhada e corrida na predição do consumo máximo de oxigênio

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