scholarly journals Reliability of a Progressive Maximal Cycle Ergometer Test to Assess Peak Oxygen Uptake in Children With Mild to Moderate Cerebral Palsy

2014 ◽  
Vol 94 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Merel-Anne Brehm ◽  
Astrid C.J. Balemans ◽  
Jules G. Becher ◽  
Annet J. Dallmeijer
Keyword(s):  
Cerebral Palsy ◽  
Oxygen Uptake ◽  
Cardiorespiratory Fitness ◽  
Peak Oxygen Uptake ◽  
Cycle Ergometer ◽  
Small Sample ◽  
Cycle Ergometer Test ◽  
Ergometer Test ◽  
Maximal Cycle ◽  
Gmfcs Level

BackgroundRehabilitation research in children with cerebral palsy (CP) is increasingly addressing cardiorespiratory fitness testing. However, evidence on the reliability of peak oxygen uptake (V̇o2peak) measurements, considered the best indicator of aerobic fitness, is not available in this population.ObjectiveThe objective of this study was to establish the reliability of a progressive maximal cycle ergometer test when assessing V̇o2peak in children with mild to moderate CP.DesignRepeated measures were used to assess test-retest reliability.MethodsEligible participants were ambulant, 6 to 14 years of age, and classified as level I, II, or III according to the Gross Motor Function Classification System (GMFCS). Two progressive maximal cycle ergometer tests were conducted (separated by 3 weeks), with the workload increasing every minute in steps of 3 to 11 W, dependent on height and GMFCS level. Reliability was determined by means of the intraclass correlation coefficient (ICC [2,1]) and smallest detectable change (SDC).ResultsTwenty-one children participated (GMFCS I: n=4; GMFCS II: n=12; and GMFCS III: n=5). Sixteen of them (9 boys, 7 girls; GMFCS I: n=3; GMFCS II: n=11; and GMFCS III: n=2) performed 2 successful tests, separated by 9.5 days on average. Reliability for V̇o2peak was excellent (ICC=.94, 95% confidence interval=.83–.98). The SDC was 5.72 mL/kg/min, reflecting 14.6% of the mean.LimitationsThe small sample size did not allow separate analysis of reliability per GMFCS level.ConclusionsIn children with CP of GMFCS levels I and II, a progressive maximal cycle ergometer test to assess V̇o2peak is reliable and has the potential to detect change in cardiorespiratory fitness over time. Further study is needed to establish the reliability of V̇o2peak in children of GMFCS level III.

A Clinical Method for Estimation of VO2max Using Seismocardiography

2020 ◽  
Vol 41 (10) ◽  
pp. 661-668
Author(s):  
Kasper Sørensen ◽  
Mathias Krogh Poulsen ◽  
Dan Stieper Karbing ◽  
Peter Søgaard ◽  
Johannes Jan Struijk ◽  
...  
Keyword(s):  
Prediction Model ◽  
Cardiorespiratory Fitness ◽  
Demographic Data ◽  
Cycle Ergometer ◽  
Accurate Estimation ◽  
Clinical Method ◽  
Cycle Ergometer Test ◽  
Aortic Valve Closure ◽  
Proposed Model ◽  
Ergometer Test

AbstractThe purpose of this study was to investigate the correlation between the seismocardiogram and cardiorespiratory fitness. Cardiorespiratory fitness can be estimated as VO2max using non-exercise algorithms, but the results can be inaccurate. Healthy subjects were recruited for this study. Seismocardiogram and electrocardiogram were recorded at rest. VO2max was measured during a maximal effort cycle ergometer test. Amplitudes and timing intervals were extracted from the seismocardiogram and used in combination with demographic data in a non-exercise prediction model for VO2max. 26 subjects were included, 17 females. Mean age: 38.3±9.1 years. The amplitude following the aortic valve closure derived from the seismocardiogram had a significant correlation of 0.80 (p<0.001) to VO2max. This feature combined with age, sex and BMI in the prediction model, yields a correlation to VO2max of 0.90 (p<0.001, 95% CI: 0.83–0.94) and a standard error of the estimate of 3.21 mL·kg−1·min−1 . The seismocardiogram carries information about the cardiorespiratory fitness. When comparing to other non-exercise models the proposed model performs better, even after cross validation. The model is limited when tracking changes in VO2max. The method could be used in the clinic for a more accurate estimation of VO2max compared to current non-exercise methods.

Maximal heart rates and plasma lactate concentrations observed in middle-aged men and women during a maximal cycle ergometer test

1993 ◽  
Vol 66 (3) ◽  
pp. 281-284 ◽  
Author(s):  
A. M. P. M. Bovens ◽  
M. A. van Baak ◽  
J. G. P. M. Vrencken ◽  
J. A. G. Wijnen ◽  
F. T. J. Verstappen
Keyword(s):  
Cycle Ergometer ◽  
Plasma Lactate ◽  
Middle Aged ◽  
Men And Women ◽  
Heart Rates ◽  
Cycle Ergometer Test ◽  
Ergometer Test ◽  
Maximal Cycle

scholarly journals The association between birth by cesarean section and adolescent cardiorespiratory fitness in a cohort of 339,451 Swedish males

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Lucas D. Ekstrom ◽  
Viktor H. Ahlqvist ◽  
Margareta Persson ◽  
Cecilia Magnusson ◽  
Daniel Berglind
Keyword(s):  
Cesarean Section ◽  
Cardiorespiratory Fitness ◽  
Cycle Ergometer ◽  
Elective Cesarean Section ◽  
Cesarean Sections ◽  
Cycle Ergometer Test ◽  
Elective Cesarean ◽  
Birth Characteristics ◽  
Ergometer Test

Abstract Birth by cesarean section is increasing worldwide and associates with offspring morbidities capable of adversely impacting cardiorespiratory fitness later in life. Whether birth by cesarean section associates with lower levels of cardiorespiratory fitness later in life is unknown and is of interest to public health. Four Swedish national registers were linked to follow 339,451 singleton males, born between 1973–1987 until December 31 2005, for Watt-maximum achieved on a cycle ergometer test at conscription into the Swedish military. Main exposure was birth by cesarean section which was compared to vaginal birth. A sub-population of 45,999 males born between 1982–1987 was identified to explore differentiated associations between elective and non-elective cesarean section with Watt-maximum. Within-family analyses of 34,252 families with 70,632 biological male siblings, who conscripted during the study period, were performed to explore the role of familial confounding on Watt-maximum. Swedish males born by cesarean section achieved lower mean Watt-maximum (− 2.32 W, 95%C.I. − 2.90 to − 1.75) and displayed excess odds of low cardiorespiratory fitness (aOR = 1.08, 95%C.I. 1.05 to 1.11) at conscription in the eighteenth life-year compared to males born vaginally after adjusting for birth characteristics, maternal morbidities and parental socioeconomic position. In the sub-population, males born 1982–1987, there was a greater negative association of elective cesarean section with cardiorespiratory fitness (− 4.42 W, 95%C.I. − 6.27 to − 2.57, p < 0.001) than non-elective cesarean sections (− 1.96 W, 95%C.I. − 3.77 to − 0.16, p = 0.033) as compared to vaginal births. No associations between modes of cesarean delivery and cardiorespiratory fitness levels persisted in the within-family analyses where biological male siblings were compared whilst controlling for factors shared within families. Males born by cesarean section had lower levels of cardiorespiratory fitness eighteen years later compared to males born vaginally. These findings appear to be largely explained by factors of familial confounding.

The Reliability and Validity of the 9-Minute Run in Third-Grade Children

1994 ◽  
Vol 6 (2) ◽  
pp. 178-187 ◽  
Author(s):  
Kenneth R. Turley ◽  
Jack H. Wilmore ◽  
Bruce Simons-Morton ◽  
Jean M. Williston ◽  
Jackie Reeds Epping ◽  
...  
Keyword(s):  
Cardiorespiratory Fitness ◽  
Reliability And Validity ◽  
Total Sample ◽  
Cycle Ergometer ◽  
Third Grade ◽  
Peak Oxygen Consumption ◽  
Validity And Reliability ◽  
Cycle Ergometer Test ◽  
Intraclass Correlations ◽  
Ergometer Test

This study was designed to determine the validity and reliability of the 9-min distance run in assessing cardiorespiratory fitness in third-grade children. Fifty-one children (27 girls and 24 boys) participated in at least one maximal cycle ergometer test to determine peak oxygen consumption (V̇O2peak) and in two 9-min runs. Significant (p < .01) test-retest intraclass correlations indicated that both the peak cycle ergometer test and the 9-min run were reliable measures in boys and girls and when the total sample was combined. Interclass correlations of r = .62 and r = .64 were attained between V̇O2peak (ml·kg−1·min−1) and 9-min Run 1 and 9-min Run 2, respectively. When data were separated by gender, 9-min Run 1 and 9-min Run 2 correlated to V̇O2peak (r = .56 and r = .48 for the girls and r = .65 and r = .71 for the boys, respectively). These results suggest that the 9-min distance run is a reasonably valid and highly reliable field test for estimating cardiorespiratory fitness in third-grade children.

Peak Oxygen Uptake in Children: Evaluation of an Older Prediction Method and Development of a New One

2008 ◽  
Vol 20 (1) ◽  
pp. 62-73 ◽  
Author(s):  
Sigurbjörn Árni Arngrímsson ◽  
Torarinn Sveinsson ◽  
Erlingur Jóhannsson
Keyword(s):  
Oxygen Uptake ◽  
Prediction Method ◽  
Resting Energy Expenditure ◽  
Prediction Equation ◽  
Peak Oxygen Uptake ◽  
Cycle Ergometer ◽  
Maximal Heart Rate ◽  
Maximal Power Output ◽  
Cycle Ergometer Test ◽  
New Equation

The purpose of this study was to validate an equation that has been used to predict peak oxygen uptake (VO2peak) and, if invalid, to develop a new equation predicting VO2peak from performance on a cycle ergometer test. Forty-five 9- and 15-year-old children underwent a VO2peak test and were randomized into developmental (DEV) and cross-validation (C-V) groups. The equation under validation, which requires knowledge of resting energy expenditure (REE), underestimated VO2peak (p < .05), but once adjusted with a new parameter calculated in DEV, it cross-validated well (rYY′ = .98, SE = .18 L · min−1). The accuracy of a new prediction equation built in DEV, not using REE, was confirmed in C-V (rYY′ = .98, SE = .17 L · min−1) and the slope and intercept were not different from the line of identity (p < .05). VO2peak in schoolchildren can be predicted with good accuracy from an equation based on the whole sample [VO2peak′ = −1.5986 + 0.0115 · (maximal power output) + 0.0109 · (mass) + 0.1313 · (gender) + 0.0085 · (maximal heart rate)].

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