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Effect of hyperbaric oxygen on oxygen uptake and measurements in the blood and tissues in a normobaric environment
  1. A N H Hodges,
  2. J S Delaney,
  3. J M Lecomte,
  4. V J Lacroix,
  5. D L Montgomery
  1. McGill University, Montreal, Canada
  1. Correspondence to:
 Professor Montgomery
 Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal H2W 1S4, Canada;


Objective: To examine venous partial pressure of oxygen (Pvo2), transcutaneous oxygen tension (tcPo2), and Vo2max in a normobaric environment after a single hyperbaric oxygen (HBo2) treatment.

Methods: This was a prospective study of conditions after the intervention compared with baseline. The participants were 10 moderately trained (Vo2max =  57.6 ml/kg/min) men. Two HBo2 treatments consisting of breathing 95% oxygen at 2.5 atmospheres absolute (ATA) for 90 minutes were administered on non-consecutive days. Baseline testing included measures of Vo2max, tcPo2, and anthropometry. At 6.0 (1.0) minutes after the first HBo2 treatment, a Vo2max test was performed. After the second HBo2 treatment, leg and chest tcPo2 and Pvo2 were monitored for 60 minutes.

Results: Vo2max, running time, and peak blood lactate were not altered after the HBo2 treatment. Leg tcPo2 was lower (p  =  0.003) and chest tcPo2 was unchanged after the HBo2 treatment compared with baseline values. Pvo2 was significantly (p<0.001) lower in the first three minutes after treatment than subsequent values, but no other differences were found.

Conclusions: A single HBo2 treatment at 2.5 ATA for 90 minutes does not raise Pvo2, tcPo2, or Vo2max in a normobaric, normoxic environment.

  • ergogenic aid
  • maximal exercise
  • maximal oxygen uptake
  • transcutaneous tissue oxygen
  • HBo2, hyperbaric oxygen
  • Pvo2, venous partial pressure of oxygen
  • tcPo2, transcutaneous oxygen tension
  • Vo2max, maximum oxygen consumption

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