Cerebral oxygenation during intermittent supramaximal exercise

Ken Ichi Shibuya, Junya Tanaka, Naomi Kuboyama, Tetsuro Ogaki

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

This study examined cerebral deoxygenation during intermittent supramaximal exercise in six healthy male subjects (age: 27.2±0.6 years (mean±S.E.)). The subjects performed seven times exercise at an intensity corresponding to 150% of maximal oxygen uptake (V̇O2max) on cycle ergometer (30 s exercise/15 s rest). Cerebral oxygenation was measured by near-infrared spectroscopy (NIRS). The peak blood lactate concentration after exercise was 15.3±0.2 mmol/l. Cerebral oxygenation increased in first repetition compared with at rest (+5.7±0.6 μM; P<0.05), but then decreased with time. Thus, in the last repetition cerebral oxygenation was -8.5±0.4 μM (P<0.05). There was no significant change in arterial oxygen saturation (99.6±0.1 at rest, 98.4±0.2 at the final set of intermittent exercise), and there was no correlated change in end-tidal CO 2 concentration with cerebral oxygenation (P>0.05). These findings suggest that the fatigue resulting from dynamic severe exercise related to a decrease in the cerebral oxygenation level.

Original languageEnglish
Pages (from-to)165-172
Number of pages8
JournalRespiratory Physiology and Neurobiology
Volume140
Issue number2
DOIs
Publication statusPublished - May 20 2004

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Exercise
Near-Infrared Spectroscopy
Fatigue
Lactic Acid
Healthy Volunteers
Oxygen

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Physiology
  • Pulmonary and Respiratory Medicine

Cite this

Cerebral oxygenation during intermittent supramaximal exercise. / Shibuya, Ken Ichi; Tanaka, Junya; Kuboyama, Naomi; Ogaki, Tetsuro.

In: Respiratory Physiology and Neurobiology, Vol. 140, No. 2, 20.05.2004, p. 165-172.

Research output: Contribution to journalArticle

Shibuya, Ken Ichi ; Tanaka, Junya ; Kuboyama, Naomi ; Ogaki, Tetsuro. / Cerebral oxygenation during intermittent supramaximal exercise. In: Respiratory Physiology and Neurobiology. 2004 ; Vol. 140, No. 2. pp. 165-172.
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