scholarly journals Assessment of the 5-Minute Oxygen Uptake Efficiency Slope in Children With Obesity

2017 ◽  
Vol 29 (3) ◽  
pp. 350-360 ◽  
Author(s):  
Katrin A. Dias ◽  
Concetta E Masterson ◽  
Matthew P. Wallen ◽  
Arnt E. Tjonna ◽  
Mansoureh S. Hosseini ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Exercise Test ◽  
Nutrition Intervention ◽  
Peripheral Fatigue ◽  
Strongly Correlated ◽  
Cross Sectional ◽  
Uptake Efficiency ◽  
Exercise Treadmill ◽  
Sectional Analysis ◽  
Oxygen Uptake Efficiency Slope

Purpose:Poor cardiorespiratory fitness is associated with increased all cause morbidity and mortality. In children with obesity, maximum oxygen uptake (V̇O2max) may not be achieved due to reduced motivation and peripheral fatigue. We aimed to identify a valid submaximal surrogate for V̇O2max in children with obesity.Method:Ninety-two children with obesity (7–16 years) completed a maximal exercise treadmill test and entered a three-month exercise and/or nutrition intervention after which the exercise test was repeated (n = 63). Participants were required to reach V̇O2max to be included in this analysis (n = 32 at baseline and n = 13 at both time-points). The oxygen uptake efficiency slope (OUES) was determined as the slope of the line when V̇O2 (L/min) was plotted against log V̇E. Associations between the maximal OUES, submaximal OUES (at 3, 4, 5 and 6 min of the exercise test) and V̇O2max were calculated.Results:In the cross-sectional analysis, V̇O2max (L/min) was strongly correlated with 5-min OUES independent of Tanner puberty stage and sex (R2 = .80, p < .001). Longitudinal changes in V̇O2max were closely reflected by changes in 5-min OUES independent of change in percent body fat (R2 = .63, p < .05).Conclusion:The 5-min OUES is a viable alternative to V̇O2max when assessing children with obesity.

scholarly journals Oxygen uptake efficiency slope: a reliable surrogate parameter for exercise capacity in healthy and cardiac children?

2020 ◽  
Vol 105 (12) ◽  
pp. 1167-1174
Author(s):  
Arthur Gavotto ◽  
D'arcy Vandenberghe ◽  
Hamouda Abassi ◽  
Helena Huguet ◽  
Valerie Macioce ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Exercise Capacity ◽  
Tertiary Care ◽  
Multivariable Analysis ◽  
Female Gender ◽  
Index Number ◽  
Healthy Controls ◽  
Cross Sectional ◽  
Uptake Efficiency ◽  
Oxygen Uptake Efficiency Slope

ObjectivesCardiopulmonary exercise test (CPET) provides accurate evaluation of physical capacity and disease severity in children with congenital heart disease (CHD). However, full participation to obtain optimal measure of VO2max may be difficult. As an alternative, the oxygen uptake efficiency slope (OUES) is a reproducible and reliable parameter measured during CPET, which does not require a maximal exercise to be interpretable. This study aimed to evaluate the OUES of a large cohort of children with CHD, in comparison with healthy controls. We also intended to identify, in this specific population, the clinical and CPET variables associated with the OUES.MethodsThis cross-sectional study was carried out between November 2010 and September 2015 in two tertiary care paediatric and congenital cardiology centres.Results709 children were included (407 CHD and 302 healthy controls). The association of clinical characteristics with weight-normalised OUES (OUESkg) was studied using a multivariable analysis. The mean OUESkg was significantly lower in CHD than in healthy controls (38.6±8.5 and 43.9±8.5; p<0.001, respectively), especially in the most severe CHD. The OUESkg correlated with VO2max (r=0.85, p<0.001), with cut-off values for normal exercise capacity of 38.4 in boys and 31.0 in girls. The decrease of OUESkg was associated with increased age, increased Body Mass Index, number of cardiac catheter or surgical procedures, female gender and decreased forced vital capacity (Z-score).ConclusionThe OUES is significantly impaired in children with CHD and strongly correlates with VO2max. The OUES has the same clinical determinants as VO2max and therefore may be of interest in submaximal exercise.Trial registration numberNCT01202916.

scholarly journals The Influence of Maturation on the Oxygen Uptake Efficiency Slope

2012 ◽  
Vol 24 (3) ◽  
pp. 347-356 ◽  
Author(s):  
Michael P. Rogowski ◽  
Justin P. Guilkey ◽  
Brooke R. Stephens ◽  
Andrew S. Cole ◽  
Anthony D. Mahon
Keyword(s):  
Oxygen Uptake ◽  
Body Mass ◽  
Cycle Ergometer ◽  
Group Differences ◽  
Healthy Male ◽  
Uptake Efficiency ◽  
Graded Exercise ◽  
Oxygen Uptake Efficiency Slope ◽  
Male Subjects ◽  
One Way Anova

This study examined the influence of maturation on the oxygen uptake efficiency slope (OUES) in healthy male subjects. Seventy-six healthy male subjects (8–27 yr) were divided into groups based on maturation status: prepubertal (PP), midpubertal (MP), late-pubertal (LP), and young-adult (YA) males. Puberty status was determined by physical examination. Subjects performed a graded exercise test on a cycle ergometer to determine OUES. Group differences were assessed using a one-way ANOVA. OUES values (VO2L·min1/log10VEL·min−1) were lower in PP and MP compared with LP and YA (p < .05). When OUES was expressed relative to body mass (VO2mL·kg−1·min−1/log10VEmL·kg−1·min−1) differences between groups reversed whereby PP and MP had higher mass relative OUES values compared with LP and YA (p < .05). Adjusting OUES by measures of body mass failed to eliminate differences across maturational groups. This suggests that qualitative factors, perhaps related to oxidative metabolism, account for the responses observed in this study.

Causes of nonlinearity of the oxygen uptake efficiency slope: a prospective study in patients with chronic heart failure

2012 ◽  
Vol 21 (3) ◽  
pp. 347-353 ◽  
Author(s):  
Victor M Niemeijer ◽  
Marcel van ‘t Veer ◽  
Goof Schep ◽  
Ruud F Spee ◽  
Adwin Hoogeveen ◽  
...  
Keyword(s):  
Heart Failure ◽  
Chronic Heart Failure ◽  
Oxygen Uptake ◽  
Prospective Study ◽  
Uptake Efficiency ◽  
A Prospective Study ◽  
Oxygen Uptake Efficiency Slope

Accuracy of oxygen uptake efficiency slope in adults with congenital heart disease

2009 ◽  
Vol 133 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Alessandro Giardini ◽  
Salvatore Specchia ◽  
Gaetano Gargiulo ◽  
Diego Sangiorgi ◽  
Fernando M. Picchio
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Oxygen Uptake ◽  
Congenital Heart ◽  
Uptake Efficiency ◽  
Oxygen Uptake Efficiency Slope

scholarly journals Validity of Reporting Oxygen Uptake Efficiency Slope from Submaximal Exercise Using Respiratory Exchange Ratio as Secondary Criterion

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Wilby Williamson ◽  
Jonathan Fuld ◽  
Kate Westgate ◽  
Karl Sylvester ◽  
Ulf Ekelund ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Test Data ◽  
Exercise Intensity ◽  
Respiratory Exchange Ratio ◽  
Fold Increase ◽  
Moderate Intensity ◽  
Uptake Efficiency ◽  
Highly Correlated ◽  
Oxygen Uptake Efficiency Slope ◽  
Treadmill Protocol

Background. Oxygen uptake efficiency slope (OUES) is a reproducible, objective marker of cardiopulmonary function. OUES is reported as being relatively independent of exercise intensity. Practical guidance and criteria for reporting OUES from submaximal tests has not been established.Objective. Evaluate the use of respiratory exchange ratio (RER) as a secondary criterion for reporting OUES.Design. 100 healthy volunteers (53 women) completed a ramped treadmill protocol to exhaustive exercise. OUES was calculated from data truncated to RER levels from 0.85 to 1.2 and compared to values generated from full test data. Results. Mean (sd) OUES from full test data and data truncated to RER 1.0 and RER 0.9 was 2814 (718), 2895 (730), and 2810 (789) mL/min per 10-fold increase in VE, respectively. Full test OUES was highly correlated with OUES from RER 1.0 (r=0.9) and moderately correlated with OUES from RER 0.9 (r=0.79).Conclusion. OUES values peaked in association with an RER level of 1.0. Sub-maximal OUES values are not independent of exercise intensity. There is a significant increase in OUES value as exercise moves from low to moderate intensity. RER can be used as a secondary criterion to define this transition.

scholarly journals Força muscular como determinante da eficiência do consumo de oxigênio e da máxima resposta metabólica ao exercício em pacientes com DPOC leve/moderada

2012 ◽  
Vol 38 (5) ◽  
pp. 541-549 ◽  
Author(s):  
Paulo de Tarso Guerrero Müller ◽  
Carlos Alberto de Assis Viegas ◽  
Luiz Armando Pereira Patusco
Keyword(s):  
Oxygen Uptake ◽  
Uptake Efficiency ◽  
Oxygen Uptake Efficiency Slope

OBJETIVO: Comparar o comportamento de oxygen uptake efficiency slope (OUES, inclinação da eficiência do consumo de oxigênio) com o do consumo de oxigênio no pico do exercício (VO2pico). MÉTODOS: Estudo prospectivo transversal envolvendo 21 pacientes (15 homens) com DPOC leve/moderada que foram submetidos a espirometria, dinamometria de preensão palmar (DIN), teste cardiopulmonar de exercício e medida de lactato no pico do exercício (LACpico). RESULTADOS: A média de peso foi 66,7 ± 13,6 kg, e a de idade foi 60,7 ± 7,8 anos. Com exceção de VEF1 e relação VEF1/CVF (75,8 ± 18,6 do previsto e 56,6 ± 8,8, respectivamente), as demais variáveis espirométricas foram normais, assim como DIN. As médias, em % do previsto, para VO2pico (93,1 ± 15,4), FC máxima (92,5 ± 10,4) e OUES (99,4 ± 24,4), assim como a da taxa de troca respiratória (1,2 ± 0,1), indicaram estresse metabólico e hemodinâmico importante. A correlação entre o VO2pico e a OUES foi elevada (r = 0,747; p < 0,0001). A correlação entre DIN e VO2pico (r = 0,734; p < 0,0001) foi mais expressiva do que com aquela entre DIN e OUES (r = 0,453; p < 0,05). Resultados semelhantes ocorreram em relação às correlações de VO2pico e OUES com PImáx. Houve correlação significativa entre VO2pico e LACpico (r = -0,731; p < 0,0001), mas essa só ocorreu entre OUES e LACpico/potência máxima (r = -0,605; p = 0,004). CONCLUSÕES: Nossos resultados sugerem que, na DPOC leve/moderada, determinantes do VO2, além da força muscular global, têm um maior impacto na OUES do que no VO2pico.

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