Oxygen Uptake To Work Rate Relationship During Exercise In Children With Lung, Heart Or Muscle Disease.

2009 ◽  
Vol 41 ◽  
pp. 114
Author(s):  
Wim G. Groen ◽  
Erik H. Hulzebos ◽  
Paul J. Helders ◽  
Tim Takken
Keyword(s):  
Oxygen Uptake ◽  
Work Rate ◽  
Muscle Disease ◽  
Rate Relationship

scholarly journals Maximal Oxygen Uptake Validation in Children With Expiratory Flow Limitation

2013 ◽  
Vol 25 (1) ◽  
pp. 84-100 ◽  
Author(s):  
Katherine E. Robben ◽  
David C. Poole ◽  
Craig A. Harms
Keyword(s):  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Constant Load ◽  
Work Rate ◽  
Flow Limitation ◽  
Expiratory Flow Limitation ◽  
Test Protocol ◽  
Wide Range ◽  
Rate Relationship ◽  
Expiratory Flow

A two-test protocol (incremental/ramp (IWT) + supramaximal constant-load (CWR)) to affirm max and obviate reliance on secondary criteria has only been validated in highly fit children. In girls (n = 15) and boys (n = 12) with a wide range of VO2max (17–47 ml/kg/min), we hypothesized that this procedure would evince a VO2-WR plateau and unambiguous VO2max even in the presence of expiratory flow limitation (EFL). A plateau in the VO2-work rate relationship occurred in 75% of subjects irrespective of EFL There was a range in RER at max exercise for girls (0.97–1.14; mean 1.06 ± 0.04) and boys (0.98−1.09; mean 1.03 ± 0.03) such that 3/15 girls and 2/12 boys did not achieve the criterion RER. Moreover, in girls with RER > 1.0 it would have been possible to achieve this criterion at 78% VO2max. Boys achieved 92% VO2max at RER = 1.0. This was true also for HRmax where 8/15 girls’ and 6/12 boys’ VO2max would have been rejected based on HRmax being < 90% of age-predicted HRmax. In those who achieved the HRmax criterion, it represented a VO2 of 86% (girls) and 87% (boys) VO2max. We conclude that this two-test protocol confirms VO2max in children across a threefold range of VO2max irrespective of EFL and circumvents reliance on secondary criteria.

scholarly journals The Oxygen Uptake Plateau—A Critical Review of the Frequently Misunderstood Phenomenon

2021 ◽  
Author(s):  
Max Niemeyer ◽  
Raphael Knaier ◽  
Ralph Beneke
Keyword(s):  
Oxygen Uptake ◽  
Anaerobic Capacity ◽  
Preliminary Evidence ◽  
Work Rate ◽  
Exercise Tests ◽  
Physiological Factors ◽  
Cycling Exercise ◽  
Rate Relationship ◽  
Sampling Intervals ◽  
Severe Exercise

AbstractA flattening of the oxygen uptake–work rate relationship at severe exercise indicates the achievement of maximum oxygen uptake $$\left({\text{VO}}_{2\max } \right)$$ VO 2 max . Unfortunately, a distinct plateau $$\left( {{{\text{VO}}}_{2} {\text{pl}}} \right)$$ VO 2 pl at $${{\text{VO}}}_{2\max }$$ VO 2 max is not found in all participants. The aim of this investigation was to critically review the influence of research methods and physiological factors on the $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl incidence. It is shown that many studies used inappropriate definitions or methodical approaches to check for the occurrence of a $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl . In contrast to the widespread assumptions it is unclear whether there is higher $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl incidence in (uphill) running compared to cycling exercise or in discontinuous compared to continuous incremental exercise tests. Furthermore, most studies that evaluated the validity of supramaximal verification phases, reported verification bout durations, which are too short to ensure that $${{\text{VO}}}_{2\max }$$ VO 2 max have been achieved by all participants. As a result, there is little evidence for a higher $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl incidence and a corresponding advantage for the diagnoses of $${{\text{VO}}}_{2\max }$$ VO 2 max when incremental tests are supplemented by supramaximal verification bouts. Preliminary evidence suggests that the occurrence of a $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl in continuous incremental tests is determined by physiological factors like anaerobic capacity, $${{\text{VO}}}_{2}$$ VO 2 -kinetics and accumulation of metabolites in the submaximal intensity domain. Subsequent studies should take more attention to the use of valid $${{\text{VO}}}_{2} {\text{pl}}$$ VO 2 pl definitions, which require a cut-off at ~ 50% of the submaximal $${{\text{VO}}}_{2}$$ VO 2 increase and rather large sampling intervals. Furthermore, if verification bouts are used to verify the achievement of $${{\text{VO}}}_{{2{\text{peak}}}}$$ VO 2 peak /$${{\text{VO}}}_{2\max }$$ VO 2 max , it should be ensured that they can be sustained for sufficient durations.

scholarly journals Prognostic power of oxygen uptake work rate relationship during submaximal exercise in cardiac patients

2002 ◽  
Vol 39 ◽  
pp. 151
Author(s):  
Akira Koike ◽  
Haruki Itoh ◽  
Makoto Kato ◽  
Tadanori Aizawa ◽  
Hiroyuki Iinuma ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Submaximal Exercise ◽  
Work Rate ◽  
Cardiac Patients ◽  
Rate Relationship ◽  
Prognostic Power

Oxygen Uptake to Work Rate Slope in Children with a Heart, Lung or Muscle Disease

2010 ◽  
Vol 31 (03) ◽  
pp. 202-206 ◽  
Author(s):  
W. Groen ◽  
H. Hulzebos ◽  
P. Helders ◽  
T. Takken
Keyword(s):  
Oxygen Uptake ◽  
Work Rate ◽  
Muscle Disease

scholarly journals Changes in Oxygen Uptake-Work Rate Relationship as A Compensatory Mechanism in Patients with Heart Failure.

1992 ◽  
Vol 56 (5) ◽  
pp. 504-508 ◽  
Author(s):  
HARUKI ITOH ◽  
MASATO NAKAMURA ◽  
CHIEKO IKEDA ◽  
ETSUKO YANAGISAWA ◽  
FUMIHIKO HATOGAI ◽  
...  
Keyword(s):  
Heart Failure ◽  
Oxygen Uptake ◽  
Work Rate ◽  
Compensatory Mechanism ◽  
Patients With Heart Failure ◽  
Rate Relationship

Association between the anaerobic threshold and the break-point in the double product/work rate relationship

1996 ◽  
Vol 75 (1) ◽  
pp. 14-21 ◽  
Author(s):  
M. Riley ◽  
K. Maehara ◽  
J. P�rsz�sz ◽  
M. P. K. J. Engelen ◽  
H. Tanaka ◽  
...  
Keyword(s):  
Anaerobic Threshold ◽  
Break Point ◽  
Work Rate ◽  
Double Product ◽  
Rate Relationship
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