Influence of continuous and interval training on oxygen uptake on-kinetics

Nicolas Berger, Keith Tolfrey, Alun G. Williams, Andrew M. Jones

    Research output: Contribution to journalArticle

    63 Citations (Scopus)

    Abstract

    Purpose: To examine the relative effectiveness of moderate-intensity continuous training and high-intensity interval training on pulmonary O 2 uptake (V̇O2) kinetics at the onset of moderate- and severe-intensity cycle exercise in previously sedentary subjects. Methods: Twenty-three healthy subjects (11 males; mean ± SD age 24 ± 5 yr; V̇O2peak 34.3 ± 5.5 mL·kg-1-min -1) were assigned to one of three groups: a continuous training group that completed three to four sessions per week of 30-min duration at 60% V̇O2peak (LO); an interval training group that completed three to four sessions per week involving 20 × 1-min exercise bouts at 90% V̇O2peak separated by 1-min rest periods (HI); or a control group (CON). Before and after the 6-wk intervention period, all subjects completed a series of step exercise tests to moderate and severe work rates during which pulmonary V̇O2 was measured breath-by-breath. Results: ANOVA revealed that continuous and interval training were similarly effective in reducing the phase II V̇O2 time constant during moderate (LO: from 31 ± 8 to 23 ± 5 s; HI: from 32 ± 9 to 21 ± 4 s; both P < 0.05; CON: from 30 ± 6 to 29 ± 7 s; NSD) and severe exercise (LO: from 35 ± 6 to 24 ± 7 s; HI: from 32 ± 11 to 24 ± 7 s; both P < 0.05; CON: from 27 ± 7 to 25 ± 5 s; NSD) and in reducing the amplitude of the V̇O2 slow component (LO: from 0.38 ± 0.10 to 0.29 ± 0.09 L·min-1; HI: from 0.41 ± 0.28 to 0.30 ± 0.28 L·min-1; both P < 0.05; CON: from 0.54 ± 0.22 to 0.66 ± 0.38 L·min-1; NSD). Conclusions: Six weeks of low-intensity continuous training and high-intensity interval training were similarly effective in enhancing V̇O2 on-kinetics following step transitions to moderate and severe exercise in previously untrained subjects.

    Original languageEnglish
    Pages (from-to)504-512
    Number of pages9
    JournalMedicine and Science in Sports and Exercise
    Volume38
    Issue number3
    DOIs
    Publication statusPublished - 1 Mar 2006

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