Influence of Oxygen Administration on Cardiovascular Function During Exercise and Recovery

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Abstract
The influence of O2 admn. before, during and after exercise on heart rate, blood pressure, blood lactate, endurance and subjective impressions has been studied. The admn. of O2 before exercise was without effect on the magnitude of these changes during exercise and recovery. Recovery was not hastened by the admn. of O2 during the recovery period. When O2 was given during the exercise, heart rate and blood pressure changes were not affected, but there was a small but significant decrease in max. blood lactate concn., and an increase in time required to produce exhaustion. Inadequate oxygenation of blood in the lungs is of minor importance in determining capacity for exercise and rate of recovery from exercise.

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