The V̇O2 response for an exhaustive treadmill run at 800-m pace: A breath-by-breath analysis

S. B. Draper, D. M. Wood

Research output: Contribution to journalJournal Article

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Abstract

Recent research in which data were averaged over 10 or 30 s suggests that the VO(2) response of aerobically fit individuals plateaus below VO(2 max) in an exhaustive square-wave run lasting approximately 2 min. To investigate this phenomenon we examined the breath-by-breath VO(2) response of trained runners to an exhaustive treadmill run at 800 m pace. Eight male competitive runners completed two treadmill tests on separate days: a ramp test to exhaustion and an exhaustive square-wave run at 800-m pace. For the ramp test, the breath-by-breath data were smoothed with a 15-s moving average and the highest of the smoothed values was taken as VO(2 peak) [mean (SD): 68.9 (5.6) ml kg(-1) min(-1)]. For the square-wave, the breath-by-breath data were interpolated to give one value per second and modelled using a monoexponential function. Following a delay of 11.2 (1.5) s, VO(2) increased quickly [phase-2 time constant of 10.7 (2.7) s] towards an asymptote that represented just 85 (6)% of VO(2 peak) from the ramp test. Expressed in ml kg(-1) min(-1), this asymptote was independent of VO(2 peak) (r=0.04, P=0.94). However, as a percentage of VO(2 peak) it was negatively correlated with VO(2 peak) itself (r=-0.96, P
Original languageEnglish
Pages (from-to)381-389
Number of pages9
JournalEuropean Journal of Applied Physiology
Volume93
Issue number4
DOIs
Publication statusPublished - Jan 2005
Externally publishedYes

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Keywords

  • Severeintensity
  • Treadmill running
  • V̇O2kinetics

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title = "The V̇O2 response for an exhaustive treadmill run at 800-m pace: A breath-by-breath analysis",
abstract = "Recent research in which data were averaged over 10 or 30 s suggests that the VO(2) response of aerobically fit individuals plateaus below VO(2 max) in an exhaustive square-wave run lasting approximately 2 min. To investigate this phenomenon we examined the breath-by-breath VO(2) response of trained runners to an exhaustive treadmill run at 800 m pace. Eight male competitive runners completed two treadmill tests on separate days: a ramp test to exhaustion and an exhaustive square-wave run at 800-m pace. For the ramp test, the breath-by-breath data were smoothed with a 15-s moving average and the highest of the smoothed values was taken as VO(2 peak) [mean (SD): 68.9 (5.6) ml kg(-1) min(-1)]. For the square-wave, the breath-by-breath data were interpolated to give one value per second and modelled using a monoexponential function. Following a delay of 11.2 (1.5) s, VO(2) increased quickly [phase-2 time constant of 10.7 (2.7) s] towards an asymptote that represented just 85 (6){\%} of VO(2 peak) from the ramp test. Expressed in ml kg(-1) min(-1), this asymptote was independent of VO(2 peak) (r=0.04, P=0.94). However, as a percentage of VO(2 peak) it was negatively correlated with VO(2 peak) itself (r=-0.96, P",
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The V̇O2 response for an exhaustive treadmill run at 800-m pace: A breath-by-breath analysis. / Draper, S. B.; Wood, D. M.

In: European Journal of Applied Physiology, Vol. 93, No. 4, 01.2005, p. 381-389.

Research output: Contribution to journalJournal Article

TY - JOUR

T1 - The V̇O2 response for an exhaustive treadmill run at 800-m pace: A breath-by-breath analysis

AU - Draper, S. B.

AU - Wood, D. M.

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