2011
DOI: 10.1055/s-0031-1273754
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Abstract: Exercise intensity has traditionally been described, prescribed and normalised as a fraction (%) of the maximal oxygen uptake ( V˙O (2max)). We hypothesised that the extent of inter-subject variability in the physiological responses to exercise would be greater when work rates were prescribed using % V˙O (2max) as compared to % 'delta' (Δ), a method of normalising exercise intensity in which both the gas exchange threshold (GET) and the V˙O (2max) are considered. 9 men completed a ramp incremental test on a cy… Show more

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Cited by 64 publications
(90 citation statements)
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“…In this study percentage of peak work rate was used to match relative intensities between sexes, however, recent work has suggested this methodology is not ideal due to differences in gas exchange threshold and critical power between individuals (Katch et al 1978; Lansley et al 2011). As such the moderate and vigorous intensities compared in this study may under/overestimate work rates or physiological demand for all individuals, which could shift individuals to different points on the VO 2 kinetic continuum and thereby alter the cardiopulmonary demand.…”
Section: Discussionmentioning
confidence: 99%
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“…In this study percentage of peak work rate was used to match relative intensities between sexes, however, recent work has suggested this methodology is not ideal due to differences in gas exchange threshold and critical power between individuals (Katch et al 1978; Lansley et al 2011). As such the moderate and vigorous intensities compared in this study may under/overestimate work rates or physiological demand for all individuals, which could shift individuals to different points on the VO 2 kinetic continuum and thereby alter the cardiopulmonary demand.…”
Section: Discussionmentioning
confidence: 99%
“…However, continued research in this area is needed to validate our findings, particularly at submaximal intensities. One alternative approach to standardizing cardiac demand may be to use the percent delta concept as described by Lansley et al (Lansley et al 2011) . Additionally, females in this study were not all tested in the early follicular phase of their menstrual cycle which could have added additional variability to the response observed in these women; however controlling for this phase would likely have made the differences noted in this study more robust.…”
Section: Discussionmentioning
confidence: 99%
“…It is also known that CP typically occurs between approximately 40-60% ∆, with a mean of 50% ∆ 6,11 . This is confirmed by the present data since only two subjects of the 15 subjects studied had a CP outside this range (CP was equivalent to 32% and 64% ∆ in the two subjects).…”
Section: Discussionmentioning
confidence: 99%
“…This is confirmed by the present data since only two subjects of the 15 subjects studied had a CP outside this range (CP was equivalent to 32% and 64% ∆ in the two subjects). Thus, according to Lansley et al 11 , the prescription of exercise at ≤ 40% ∆ and ≥ 60% ∆ should result in metabolic and physiological response profiles that are consistent with heavy-and severe-intensity exercise, respectively, in the majority of healthy subjects. However, considering some studies with small sample sizes (many studies have used seven subjects) 12,21 , any subject with a CP outside this range could compromise the results.…”
Section: Discussionmentioning
confidence: 99%
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