Metabolic profile of high intensity intermittent exercises

Izumi Tabata, Kouichi Irisawa, Motoki Kouzaki, Kouji Nishimura, Futoshi Ogita, Motohiko Miyachi

Research output: Contribution to journalArticlepeer-review

135 Citations (Scopus)

Abstract

To evaluate the magnitude of the stress on the aerobic and the anaerobic energy release systems during high intensity bicycle training, two commonly used protocols (IE1 and IE2) were examined during bicycling. IE1 consisted of one set of 6-7 bouts of 20-s exercise at an intensity of approximately 170% of the subject's maximal oxygen uptake (V̇O(2max) with a 10-s rest between each bout. IE2 involved one set of 4-5 bouts of 30-s exercise at an intensity of approximately 200% of the subject's V̇O(2max) and a 2-min rest between each bout. The accumulated oxygen deficit of IE1 (69 ± 8 ml · kg-1, mean ± SD) was significantly higher than that of IE2 (46 ± 12 ml · kg-1, N = 9, p < 0.01). The accumulated oxygen deficit of IE1 was not significantly different from the maximal accumulated oxygen deficit (the anaerobic capacity) of the subjects (69 ± 10 ml · kg-1), whereas the corresponding value for IE2 was less than the subjects' maximal accumulated oxygen deficit (P < 0.01). The peak oxygen uptake during the last 10 s of the IE1 (55 ± 6 ml · kg-1 · min-1) was not significantly less than the V̇O(2max) of the subjects (57 ± 6 ml · kg-1 · min-1). The peak oxygen uptake during the last 10 s of IE2 (47 ± 8 ml · kg-1 · min-1) was lower than the V̇O(2max) (P < 0.01). In conclusion, this study showed that intermittent exercise defined by the IE1 protocol may tax both the anaerobic and aerobic energy releasing systems almost maximally.

Original languageEnglish
Pages (from-to)390-395
Number of pages6
JournalMedicine and Science in Sports and Exercise
Volume29
Issue number3
DOIs
Publication statusPublished - 1997 Mar
Externally publishedYes

Keywords

  • ACCUMULATED OXYGEN DEFICIT
  • ANAEROBIC CAPACITY
  • BICYCLING
  • MAXIMAL OXYGEN UPTAKE

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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