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PREDICTIVE STUDIES VII (PS VII): Interactions of Hyperoxia, Exercise, and Immersion in Neurologic O2 Poisoning.
Major Category: Oxygen toxicity and oxygenation. Immersion. Exercise. (PS VII)
Subcategory 5: Development and characterization of underwater ergometer system.

Stressors: exercise, in dry and immersed states

Date: 1992

Expt. Title: Development of laboratory underwater ergometry system for controlled hyperoxic exercise. (Expt. 13.00)

Description:

See PS VII experiment protocols. Reports. A bicycle ergometer system was developed for use underwater. The ergometer itself was supported on a frame assembly out of the water, with its crank unit immersed. The system was calibrated in two ways. Rates of O2 uptake were determined in 8 Subjects pedaling at 60 rpm with imposed workloads of 30, 50, 75, 100, 125 and 150 watts while immersed, and with loads of 30, 50, 100, 150 and 200 watts in the dry condition. In addition, rates of O2 uptake were obtained as functions of pedal rate in the dry and immersed states in the same 8 Subjects. The data obtained allows for matching of O2 uptake rates during comparisons of physiologic responses to exercise and other stressors in the dry and immersed states.

Measurements:

Ventilation, mixed-expired gases for determination of rates of O2 uptake and CO2 elimination, pedal rate

REPORT: Beck, G. Jr., R. Gelfand, T.S. Pak, R.D. Fagan, and J.M. Clark. Immersion effects on bicycle ergometry (ABSTRACT). Undersea and Hyperbaric Med. 20 (S): 37, 1993.

07 February 2000 11:07:45 AM