<i>Maximal Oxygen Intake as an Objective Measure of Cardio-Respiratory Performance</i>

Taylor, Henry L.; Buskirk, E. R.; Henschel, Austin

doi:10.1152/jappl.1955.8.1.73

Cited by 1,243 publications

(654 citation statements)

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“…Of the 308 subjects, 204 subjects (men, n = 112; women, n = 92), completed both the maximum oxygen uptake test and a 5-km performance test on the running track. The subject's maximum oxygen uptake was determined during inclined treadmill running using a modification of procedures originally described by Taylor et al (1955). The speed of the treadmill was constant throughout the test, but the elevation was increased by 2.5°70 every 3 min.…”

Section: Scaling Models and Statistical Methodsmentioning

confidence: 99%

Scaling physiological measurements for individuals of different body size

Nevill

Ramsbottom

Williams

1992

Europ. J. Appl. Physiol.

284

272

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Summary. This paper examines how selected physiological performance variables, such as maximal oxygen uptake, strength and power, might best be scaled for subject differences in body size. The apparent dilemma between using either ratio standards or a linear adjustment method to scale was investigated by considering how maximal oxygen uptake (l" rain-1), peak and mean power output (W) might best be adjusted for differences in body mass (kg). A curvilinear power function model was shown to be theoretically, physiologically and empirically superior to the linear models. Based on the fitted power functions, the best method of scaling maximum oxygen uptake, peak and mean power output, required these variables to be divided by body mass, recorded in the units kg 2/3. Hence, the power function ratio standards (ml.kg -2/3.min -1) and (W.kg-2/3) were best able to describe a wide range of subjects in terms of their physiological capacity, i.e. their ability to utilise oxygen or record power maximally, independent of body size. The simple ratio standards (ml. kg-1. min-1) and (W. kg -1) were found to best describe the same subjects according to their performance capacities or ability to run which are highly dependent on body size. The appropriate model to explain the experimental design effects on such ratio standards was shown to be log-normal rather than normal. Simply by taking logarithms of the power function ratio standard, identical solutions for the design effects are obtained using either ANOVA or, by taking the unscaled physiological variable as the dependent variable and the body size variable as the covariate, ANCOVA methods.

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Section: Scaling Models and Statistical Methodsmentioning

confidence: 99%

Scaling physiological measurements for individuals of different body size

Nevill

Ramsbottom

Williams

1992

Europ. J. Appl. Physiol.

284

272

View full text Add to dashboard Cite

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“…20 However, in many subjects, including children, a plateau in VO 2 is not observed. 15 Several secondary parameters have therefore been established to determine VO 2peak without a VO 2 plateau.…”

Section: Maximal Oxygen Uptakementioning

confidence: 99%

“…23 Because VO 2peak is strongly biased by body weight, it is usually expressed as VO 2peak per millilitre per minute per kilogram body mass. 20,24 This procedure, however, underestimates the fitness of overweight and obese subjects. 25 Moreover, VO 2peak /kg body mass also underestimates the VO 2peak of taller subjects.…”

Section: Maximal Oxygen Uptakementioning

confidence: 99%

Cardiopulmonary exercise testing in congenital heart disease: (contra)indications and interpretation

Takken¹,

Blank²,

Hulzebos³

et al. 2009

NHJL

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Cardiopulmonary exercise testing in congenital heart disease: (contra)indications and interpretation Cardiopulmonary exercise testing (CPET) in paediatric cardiology differs in many aspects from the tests performed in adult cardiology. Children's cardiovascular responses during exercise testing present different characteristics, particularly oxygen uptake, heart rate and blood pressure response, which are essential in interpreting haemodynamic data. Diseases that are associated with myocardial ischaemia are rare in children. The main indications for CPET in children are evaluation of exercise capacity and the identification of exercise-induced arrhythmias. In this article we will review the main indications for CPET in children with congenital heart disease, the contraindications for exercise testing and the indications for terminating an exercise test. Moreover, we will address the interpretation of gas exchange data from CPET in children with congenital heart disease. (Neth Heart J 2009;17:385-92.)

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“…Twenty two male and seven female subjects (n 29) performed an incremental treadmill test to exhaustion according to Taylor et al (1955) for the determination of O 2max . This was preceded by a 3-min recovery walk on the level at 1.39 m á s A1 (REC).…”

Section: Study 2 Maximal Laboratory Measurements and Proceduresmentioning

confidence: 99%

Implications of moderate altitude training for sea-level endurance in elite distance runners

Bailey

Davies

Romer

et al. 1998

European Journal of Applied Physiology

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Elite distance runners participated in one of two studies designed to investigate the e ects of moderate altitude training (inspiratory partial pressure of oxygen »115±125 mmHg) on submaximal, maximal and supramaximal exercise performance following return to sea-level. Study 1 (New Mexico, USA) involved 14 subjects who were assigned to a 4-week altitude training camp (1500±2000 m) whilst 9 performance-matched subjects continued with an identical training programme at sea-level (CON). Ten EXP subjects who trained at 1640 m and 19 CON subjects also participated in study 2 (Krugersdorp, South Africa). Selected metabolic and cardiorespiratory parameters were determined with the subjects at rest and during exercise 21 days prior to (PRE) and 10 and 20 days following their return to sealevel (POST). Whole blood lactate decreased by 23% (P < 0.05 vs PRE) during submaximal exercise in the EXP group only after 20 days at sea-level (study 1). However, the lactate threshold and other measures of running economy remained unchanged. Similarly, supramaximal performance during a standardised track session did not change. Study 2 demonstrated that hypoxia per se did not alter performance. In contrast, in the EXP group supramaximal running velocity decreased by 2% (P < 0.05) after 20 days at sea-level.Both studies were characterised by a 50% increase in the frequency of upper respiratory and gastrointestinal tract infections during the altitude sojourns, and two male subjects were diagnosed with infectious mononucleosis following their return to sea-level (study 1). Group mean plasma glutamine concentrations at rest decreased by 19% or 143 (74) lM (P < 0.001) after 3 weeks at altitude, which may have been implicated in the increased incidence of infectious illness.

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Maximal Oxygen Intake as an Objective Measure of Cardio-Respiratory Performance

Cited by 1,243 publications

References 0 publications

Scaling physiological measurements for individuals of different body size

Scaling physiological measurements for individuals of different body size

Cardiopulmonary exercise testing in congenital heart disease: (contra)indications and interpretation

Implications of moderate altitude training for sea-level endurance in elite distance runners

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